One mole of ideal gas undergoes cyclic process shown in figure. Process 1 \[\to \] 2 is adiabatic. Heat given to gas in the process is (nearly)-
A)
-59 J
done
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B)
-47J
done
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C)
-42 J
done
clear
D)
None of these
done
clear
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The pressure and volume of a given mass of gas at a given temperature are P and V respectively. Keeping temperature constant, the pressure is increased by 10% and then decreased by 10%. The volume now will be-
A)
less than V
done
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B)
more than V
done
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C)
equal to V
done
clear
D)
less than V for diatomic and more than V for monoatomic
done
clear
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A wire is 4 m long and has a mass 0.2 kg. The wire is kept horizontally. A transverse pulse is generated by plucking one end of the taut (tight) wire. The pulse makes four trips back and forth along the cord in 0.8 sec. The tension is the cord will be-
A)
80 N
done
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B)
160 N
done
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C)
240 N
done
clear
D)
320 N
done
clear
View Answer play_arrow
Two tuning forks when sounded together produced 4 beats/sec. The frequency of one fork is 256. The number of beats heard increases when the fork is loaded with wax. The frequency of the other fork is-
A)
504
done
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B)
520
done
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C)
260
done
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D)
252
done
clear
View Answer play_arrow
The apparent frequency of the whistle of an engine changes by the ratio 5/3 as the engine passes a stationary observer. If the velocity of sound is 340 m/s, then the velocity of the engine is-
A)
340 m/s
done
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B)
170 m/s
done
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C)
85 m/s
done
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D)
42.5 m/s
done
clear
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The frequency of a light ray is\[6\,\,\times \,\,{{10}^{14}}\,Hz\]. Its frequency when it propagates in a medium of refractive index 1.5, will be-
A)
\[1.67\times {{10}^{14}}Hz\]
done
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B)
\[\,9.10\times {{10}^{14}}\,Hz\]
done
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C)
\[\,6\times {{10}^{14}}Hz\]
done
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D)
\[\,4\times {{10}^{14}}\,Hz\]
done
clear
View Answer play_arrow
A converging beam of light forms a sharp image on a screen. A lens is placed 10 cm from the screen in the path of the beam. It was found that the screen has to be moved 8 cm further away to obtain the sharp image. Focal length of the lens is-
A)
6.43 cm
done
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B)
-2.5 cm
done
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C)
- 22.5 cm
done
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D)
2.66 cm
done
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View Answer play_arrow
The angle of prism is \[60{}^\circ \] and its refractive index is 1.5. There will be no emergent light if the angle of incidence on the first face is \[\left( Given\text{ }sin\text{ }42{}^\circ =2/3,\text{ }sin\text{ }18{}^\circ =0.309\text{ } \right)\]
A)
equal to \[30{}^\circ \]
done
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B)
less than \[30{}^\circ \]
done
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C)
more than \[30{}^\circ \]
done
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D)
equal to \[60{}^\circ \]
done
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View Answer play_arrow
The objective lens of an astronomical telescope has a focal length of 60 cm and the eyepiece has a focal length of 2 cm. How far apart should the lenses be placed in order to form a final image at infinity?
A)
62 cm
done
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B)
44 cm
done
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C)
76 cm
done
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D)
60 cm
done
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View Answer play_arrow
A triangular prism of glass is shown in figure, A ray incident normal to one face is totally reflected. If \[\theta \] is \[45{}^\circ \], then index of refraction of the glass is-
A)
less than 1.41
done
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B)
equal to 1.41
done
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C)
greater than 1.41
done
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D)
None of these
done
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View Answer play_arrow
The central fringe of the interference pattern produced by light of wavelength 6000 A is found to shift to the position of 4th bright fringe after a glass plate of refractive index 1.5 is introduced. The thickness of the glass plate would be-
A)
\[4.8\,\mu m\]
done
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B)
\[8.23\,\mu m\]
done
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C)
\[14.98\,\mu m\]
done
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D)
\[3.78\,\mu m\]
done
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View Answer play_arrow
Two monochromatic light waves of amplitudes A and 2A interfering at a point, have a phase difference of \[60{}^\circ \]. The intensity at that point will be proportional to-
A)
\[3{{A}^{2}}\]
done
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B)
\[5{{A}^{2}}\]
done
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C)
\[7{{A}^{2}}~\]
done
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D)
\[9{{A}^{2}}\]
done
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View Answer play_arrow
The three initial and final position of a man on the x-axis are given as:
(i) (-8m, 7m), (ii) (7m, - 3m) and (iii) (-7m, 3m) Which pair gives the negative displacement?
A)
(i)
done
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B)
(ii)
done
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C)
(iii)
done
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D)
(i) and (ii)
done
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View Answer play_arrow
The engine of a motorcycle can produce a maximum acceleration\[5\text{ }m/{{s}^{2}}\]. Its brakes can produce a maximum retardation\[10\text{ }m/{{s}^{2}}\]. What is the minimum time in which it can cover a distance of 1.5 km?
A)
30 sec
done
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B)
15 sec
done
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C)
10 sec
done
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D)
5 sec
done
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View Answer play_arrow
In figure, one car is at rest and velocity of light from head light is c, then velocity of light from head light for the moving car at velocity v, would be
A)
\[c+v~\]
done
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B)
\[c-v\]
done
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C)
\[c\times v\]
done
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D)
c
done
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View Answer play_arrow
A boat crosses a river from port A to port B, which are just on the opposite side. The speed of the water is \[{{V}_{W}}\] and that of boat is \[{{V}_{B}}\] relative to still water. Assume\[{{V}_{B}}=2{{V}_{W}}\]. What is the time taken by the boat, if it has to cross the river directly on the AB line?
A)
\[\frac{2D}{{{V}_{B}}\sqrt{3}}\]
done
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B)
\[\frac{\sqrt{3}D}{2{{V}_{B}}}\]
done
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C)
\[\frac{D}{{{V}_{B}}\sqrt{2}}\]
done
clear
D)
\[\frac{D\sqrt{2}}{{{V}_{B}}}\]
done
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View Answer play_arrow
A body is projected vertically up with a velocity v and after some time it returns to the point from which it was projected. The average velocity and average speed of the body for the total time of flight are
A)
\[\frac{\overrightarrow{v}}{2}\,\,and\,\,\frac{v}{2}\]
done
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B)
\[0\,\,and\,\,\frac{v}{2}\]
done
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C)
0 and 0
done
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D)
\[\,\,\,\frac{\overrightarrow{v}}{2}\,\,and\,\,0\]
done
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View Answer play_arrow
A circular road of radius 1000 m has banking angle\[45{}^\circ \]. The maximum safe speed of a car having mass 2000 kg will be, if the coefficient of friction between tyre and road is 0.5:
A)
172 m/s
done
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B)
124 m/s
done
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C)
99 m/s
done
clear
D)
86 m/s
done
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View Answer play_arrow
Force acting on a particle is\[\left( 2\widehat{i}+3\widehat{j} \right)N\]. Work one by this force is zero, when a particle is moved on the line\[3y+kx=5\]. Here value of k is-
A)
2
done
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B)
4
done
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C)
6
done
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D)
8
done
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View Answer play_arrow
A force \[\overrightarrow{F}=4\widehat{i}-5\widehat{j}+3\widehat{k}\] is acting a point? \[{{\overrightarrow{r}}_{1}}=\widehat{i}+2\widehat{j}+3\widehat{k}\]. The torque acting about a point \[{{\overrightarrow{r}}_{2}}=3\widehat{i}-2\widehat{j}-3\widehat{k}\] is-
A)
Zero
done
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B)
\[42\widehat{i}-30\widehat{j}+6\widehat{k}\]
done
clear
C)
\[42\widehat{i}+30\widehat{j}+6\widehat{k}\]
done
clear
D)
\[42\widehat{i}+30\widehat{j}-6\widehat{k}\]
done
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View Answer play_arrow
In the figure (i) half of the meter scale is made of wood while the other half, of steel. The wooden part is pivoted at O. A force F is applied at the end of steel part. In figure (ii) the steel part is pivoted at O and the same force is applied at the wooden end
A)
More acceleration will be produced in (i)
done
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B)
More acceleration will be produced in (ii)
done
clear
C)
Same acceleration will be produced in both conditions
done
clear
D)
Information is incomplete
done
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View Answer play_arrow
A glass tube of uniform internal radius (r) has a valve separating the two identical ends. Initially, the valve is in a tightly closed position. End 1 has a hemispherical soap bubble of radius r. End 2 has subhemispherical soap-bubble as shown in figure. Just after opening the valve.
A)
Air from end 1 flows towards end 2. No change in the volume of the soap bubbles
done
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B)
Air from end 1 flows towards end 2. Volume of the soap bubble at end 1 decreases
done
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C)
No change occurs
done
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D)
Air from end 2 flows towards end 1. Volume of the soap bubble at end 1 increases
done
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View Answer play_arrow
The displacement of a particle varies according to the relation \[x=4\,\,\,(cos\,\,\pi t\,\,+\,\,sin\,\,\pi t)\]. The amplitude of the particle is-
A)
8
done
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B)
-4
done
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C)
4
done
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D)
\[4\sqrt{2}\]
done
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View Answer play_arrow
A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring reads 49 N, when the lift is stationary. If the lift moves downward with an acceleration of \[5\text{ }m/{{s}^{2}}\], the reading of the spring balance will be:
A)
49 N
done
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B)
24 N
done
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C)
74 N
done
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D)
15 N
done
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View Answer play_arrow
The escape velocity for a body projected vertically upwards from the surface of earth is 11 km/s. If the body is projected at an angle of \[45{}^\circ \] with the vertical, the escape velocity will be:
A)
\[\frac{11}{\sqrt{2}}\,\,km/s\]
done
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B)
\[11\sqrt{2}\,\,km/s\]
done
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C)
22 km/s
done
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D)
11 km/s
done
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View Answer play_arrow
The photo sensitive surface is receiving light of wavelength \[5000\text{ }\overset{\text{o}}{\mathop{\text{A}}}\,\] at the rate of \[{{10}^{-8}}\text{ }J/s\]. The number of photons received per second is:
A)
\[2.5\times {{10}^{10}}\]
done
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B)
\[2.5\times {{10}^{11}}\]
done
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C)
\[2.5\,\,\times \,\,{{10}^{12}}\]
done
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D)
\[2.5\,\,\times \,\,{{10}^{9}}\]
done
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View Answer play_arrow
If electron, proton and He have same energy, then their de Broglie wavelength decreases in order:
A)
\[{{\lambda }_{e}}>{{\lambda }_{p}}>{{\lambda }_{He}}\]
done
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B)
\[{{\lambda }_{He}}>{{\lambda }_{p}}>{{\lambda }_{e}}\]
done
clear
C)
\[{{\lambda }_{He}}>{{\lambda }_{e}}>{{\lambda }_{p}}\]
done
clear
D)
\[{{\lambda }_{p}}>{{\lambda }_{e}}>{{\lambda }_{He}}\]
done
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View Answer play_arrow
The threshold frequency for a metallic surface corresponds to an energy of 6.2 eV, and the stopping potential for a radiation incident on this surface is 5V. The incident radiation lies in:
A)
X-ray region
done
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B)
ultraviolet region
done
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C)
infrared region
done
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D)
visible region
done
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View Answer play_arrow
When a metallic surface is illuminated with monochromatic light of wavelength\[\lambda \], stopping potential for photoelectric current is \[3{{V}_{0}}\], When the same metallic surface is illuminated with a light of wavelength\[2\lambda \], the stopping potential is\[{{V}_{0}}\]. The threshold wavelength for the surface is
A)
\[6\lambda \]
done
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B)
\[4\lambda \]
done
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C)
\[4\lambda /3\]
done
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D)
\[8\lambda \]
done
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View Answer play_arrow
A freshly prepared radioactive source of half- life 2 hours emits radiation of intensity which is 64 times the permissible safe level. The minimum time after which it would be possible to work safely with the source is:
A)
6 hours
done
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B)
12 hours
done
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C)
24 hours
done
clear
D)
128 hours
done
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View Answer play_arrow
Figure shows the electric lines of force emerging from a charged body. If the electric field at A and B are \[{{E}_{A}}\,and\,\,{{E}_{B}}\] respectively and if the displacement between A and B is r then-
A)
\[{{E}_{A}}\,>\,\,{{E}_{B}}\]
done
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B)
\[{{E}_{A}}\,<\,\,{{E}_{B}}\]
done
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C)
\[{{E}_{A}}\,=\,\,\frac{{{E}_{B}}}{r}\]
done
clear
D)
\[{{E}_{A}}\,=\,\,\frac{{{E}_{B}}}{{{r}^{2}}}\]
done
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View Answer play_arrow
ABC is an equilateral triangle. Charges +q are placed at each comer. The electric intensity at Owill be-
A)
\[\frac{1}{4\pi {{\varepsilon }_{0}}}\,\,\frac{q}{{{r}^{2}}}\]
done
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B)
\[\frac{1}{4\pi {{\varepsilon }_{0}}}\,\,\frac{q}{r}\]
done
clear
C)
Zero
done
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D)
\[\frac{1}{4\pi {{\varepsilon }_{0}}}\,\,\frac{3q}{{{r}^{2}}}\]
done
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View Answer play_arrow
Two parallel plate of area A are separated by two different dielectrics as shown in figure. The net capacitance is-
A)
\[\frac{4{{\varepsilon }_{0}}A}{3d}\]
done
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B)
\[\frac{3{{\varepsilon }_{0}}A}{4d}\]
done
clear
C)
\[\frac{2{{\varepsilon }_{0}}A}{d}\]
done
clear
D)
\[\frac{{{\varepsilon }_{0}}A}{d}\]
done
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View Answer play_arrow
In a potentiometer experiment two cells of emf \[{{E}_{1}}and\text{ }{{E}_{2}}\] are used in series and in conjunction and the balancing length is found to be 58 cm of the wire. If the polarity of \[{{E}_{2}}\] is reversed, then the balancing length becomes 29 cm. The ratio \[{{E}_{1}}/{{E}_{2}}\] of the emfs of the two cells is-
A)
1 : 1
done
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B)
2 : 1
done
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C)
3 : 1
done
clear
D)
4 : 1
done
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View Answer play_arrow
If an ammeter is to be used in place of a voltmeter then we must connect with the ammeter a-
A)
Low resistance in parallel
done
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B)
High resistance in parallel
done
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C)
High resistance in series
done
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D)
Low resistance in series
done
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View Answer play_arrow
The measurement of voltmeter in the following circuit is-
A)
2.4 V
done
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B)
3.4 V
done
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C)
4.0 V
done
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D)
6.0 V
done
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View Answer play_arrow
When a magnetic field is applied in a direction perpendicular to the direction of cathode rays, then their-
A)
Energy decreases
done
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B)
Energy increases
done
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C)
Momentum increases
done
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D)
Momentum and energy remain unchanged
done
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View Answer play_arrow
If an electron is going in the direction of magnetic field \[\overrightarrow{B}\] with the velocity of \[\overrightarrow{v}\] then the force on electron is-
A)
Zero
done
clear
B)
\[e\left( \overrightarrow{v}\,.\,\overrightarrow{B} \right)\]
done
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C)
\[e\left( \overrightarrow{v}\,\,\times \,\,\overrightarrow{B} \right)\]
done
clear
D)
None of these
done
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View Answer play_arrow
Two identical short bar magnets each having magnetic moment M are placed at a distance of 2d with their axes -L to each other in a horizontal plane. The magnetic induction at a point midway between them is-
A)
\[\frac{{{\mu }_{0}}}{4\pi }\sqrt{2}\,\frac{M}{{{d}^{3}}}\]
done
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B)
\[\frac{{{\mu }_{0}}}{4\pi }(\sqrt{3})\,\frac{M}{{{d}^{3}}}\]
done
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C)
\[\left( \frac{2{{\mu }_{0}}}{4\pi } \right)\,\frac{M}{{{d}^{3}}}\]
done
clear
D)
\[\frac{{{\mu }_{0}}}{4\pi }(\sqrt{5})\,\frac{M}{{{d}^{3}}}\]
done
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View Answer play_arrow
An arbitrary shaped closed coil is made of a wire of length L and a current I ampere is flowing in it. If the plane of the coil is perpendicular to magnetic filed \[\overrightarrow{B}\], the force on the coil is-
A)
Zero
done
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B)
IBL
done
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C)
2IBL
done
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D)
\[\frac{1}{2}\,IBL\]
done
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View Answer play_arrow
A solenoid has 2000 turns wound over a length of 0.30 m. Its area of cross-section is\[1.2\,\,\times \,\,{{10}^{-}}^{3}{{m}^{2}}\]. Around its central section a coil of 300 turns is wound. If an initial current of 2A in the solenoid is reversed in 0.25 sec, the emf induced in the coil is equal to-
A)
\[6\times {{10}^{-4}}\,Volt\]
done
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B)
\[4.8\times {{10}^{-2}}Volt\]
done
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C)
\[6\times {{10}^{-2}}\,Volt\]
done
clear
D)
48 kV
done
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View Answer play_arrow
A current \[I\,\,=\,\,10\text{ }sin\,\,(100\pi \,t)\] amp. is passed in first coil, which induces a maximum e.m.f of 57i volt in second coil. The mutual inductance between the coils is-
A)
5 mH
done
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B)
10 mH
done
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C)
15 mH
done
clear
D)
20 mH
done
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View Answer play_arrow
An rms voltage of 110 V is applied across a series circuit having a resistance 11 Q and impedance 22Q. The power consumed is-
A)
275 W
done
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B)
366 W
done
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C)
55 0 W
done
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D)
1100 W
done
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View Answer play_arrow
From the zener diode circuit shown in figure, the current through the zener is-
A)
34 mA
done
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B)
31.5 mA
done
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C)
36.5 mA
done
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D)
2.5 mA
done
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View Answer play_arrow
In the following common emitter configuration an NPN transistor with current gain \[\beta =100\] is used. The output voltage of the amplifier will be-
A)
10 mV
done
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B)
0.1 V
done
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C)
1.0 V
done
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D)
10 V
done
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View Answer play_arrow
1 amu is equal to-
A)
1.00758 g
done
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B)
0.000549 g
done
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C)
\[1.66\,\,\times \,\,{{10}^{-}}^{24}\]
done
clear
D)
\[6.02\,\,\times \,\,{{10}^{-}}^{23}g\]
done
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View Answer play_arrow
Energy levels A, B, C of a certain atom corresponds to increasing value of energy, i.e.,\[{{E}_{A}}<{{E}_{B}}<{{E}_{C}}\]. If \[{{\lambda }_{1}},\,\,{{\lambda }_{2}}\,\,and\,\,{{\lambda }_{3}}\] are the wavelengths of radiations corresponding to the transitions C to B, B to A and C to A respectively. Which of the following statement is correct-
A)
\[{{\lambda }_{3}}\,\,=\,\,\,{{\lambda }_{1}}\,+\,\,{{\lambda }_{2}}\]
done
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B)
\[{{\lambda }_{3}}\,=\,\,\frac{{{\lambda }_{1}}\,{{\lambda }_{2}}}{{{\lambda }_{1}}+\,{{\lambda }_{2}}}\]
done
clear
C)
\[{{\lambda }_{1}}\,+\,\,{{\lambda }_{2}}\,+\,\,{{\lambda }_{3}}\,\,=\,\,0\]
done
clear
D)
\[\lambda _{3}^{2}\,+\,\,\lambda _{1}^{2}\,\,+\,\,\lambda _{2}^{2}\,\]
done
clear
View Answer play_arrow
From the given data identify the oxide of nitrogen that will be most stable at standard state is-
\[2{{N}_{2}}{{O}_{5}}\rightleftharpoons 2{{N}_{2}}+5{{O}_{2}},\,\,{{K}_{p}}=1.2\times {{10}^{34}}\] \[2{{N}_{2}}O\rightleftharpoons 2{{N}_{2}}+{{O}_{2}},\,\,{{K}_{p}}=3.5\times {{10}^{33}}\] \[2NO\rightleftharpoons {{N}_{2}}+{{O}_{2}},\,\,{{K}_{p}}=2.2\times {{10}^{30}}\] \[2N{{O}_{2}}\rightleftharpoons {{N}_{2}}+2{{O}_{2}},\,\,{{K}_{p}}=6.71\times {{10}^{16}}\]
A)
\[N{{O}_{2}}\]
done
clear
B)
NO
done
clear
C)
\[{{N}_{2}}O\]
done
clear
D)
\[{{N}_{2}}{{O}_{5}}\]
done
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View Answer play_arrow
A schematic plot of \[\ell n\,\,{{K}_{eq}}\] versus inverse of temperature of a reaction is shown below
The reaction must be-
A)
One with negligible enthalpy change
done
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B)
Highly spontaneous at ordinary temperature
done
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C)
Exothermic
done
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D)
Endothermic
done
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View Answer play_arrow
Cod liver oil is-
A)
Fat dispersed in water
done
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B)
Water dispersed in fat
done
clear
C)
Water dispersed in oil
done
clear
D)
Fat dispersed in fat
done
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View Answer play_arrow
The arsenius sulphide sol has negative charge the maximum coagulating power for precipitating it is of-
A)
\[0.1\,\,\left( N \right)\,\,Zn{{\left( N{{O}_{3}} \right)}_{2}}\]
done
clear
B)
\[0.1\left( N \right)N{{a}_{3}}P{{O}_{4}}\]
done
clear
C)
\[0.1\text{ }\left( N \right)ZnS{{O}_{4}}\]
done
clear
D)
\[0.1\left( N \right)AlC{{l}_{3}}\]
done
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View Answer play_arrow
A buffer solution can be prepared from a mixture of-
[a] Sodium acetate and acetic acid in water [b] Sodium acetate and hydrochloric acid in water [c] Ammonia and ammonium chloride in water [d] Ammonia and sodium hydroxide in water
A)
[a], [b]
done
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B)
[b], [c]
done
clear
C)
[c], [d]
done
clear
D)
[a], [b], [c]
done
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View Answer play_arrow
The void space in fee lattice is-
A)
\[1-\frac{\pi }{6}\]
done
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B)
\[1-\frac{\sqrt{2}\pi }{3}\]
done
clear
C)
\[1-\frac{\sqrt{2}\pi }{6}\]
done
clear
D)
\[1-\frac{\sqrt{3}\pi }{4}\]
done
clear
View Answer play_arrow
A constant current of 1.50 amp is passed through an electrolytic cell containing 0.10 N solution of \[AgN{{O}_{3}}\] and a silver anode and platinum cathode are used. After some time, the concentration of \[AgN{{O}_{3}}\] solution may be-
A)
Equal to 0.10 M
done
clear
B)
Lessthan0.10M
done
clear
C)
Greater than 0.10M
done
clear
D)
Data are not sufficient
done
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View Answer play_arrow
Lead storage battery contains -
A)
Pb rod as anode
done
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B)
Pb rod as cathode
done
clear
C)
Pb plates coated with \[Pb{{O}_{2}}\] act as cathode
done
clear
D)
[a] & [c] both
done
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View Answer play_arrow
With what minimum pressure in Kpa of given volume of an ideal gas \[\left( Cp\,\,=\,\,\frac{7}{2}R \right)\] originally at 400 K and 100 kPa pressure, be adiabatically compressed in order to raise its temperature to 600 K-
A)
362.5 kpa
done
clear
B)
275 kpa
done
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C)
437.5 kpa
done
clear
D)
550 kpa
done
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View Answer play_arrow
A '15-volume' sample of an \[{{H}_{2}}S{{O}_{4}}\] solution is equivalent to-
A)
5.30 N
done
clear
B)
1.77 N
done
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C)
2.68 N
done
clear
D)
7.50 N
done
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View Answer play_arrow
When two mole of an ideal gas \[\left( Cp\,\,=\,\,\frac{5}{2}R \right)\] heated from 300 K to 600 K at constant pressure. The change in entropy of gas \[\left( \Delta S \right)\] is-
A)
\[\frac{3}{2}R\ell n2\]
done
clear
B)
\[-\frac{3}{2}R\ell n2\]
done
clear
C)
\[5\,R\ell n2\]
done
clear
D)
\[\frac{5}{2}\,R\ell n2\]
done
clear
View Answer play_arrow
pH of a 0.1 M monobasic acid is measured to be 2. Its osmotic pressure at a given temperature T K is-
A)
0.1 RT
done
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B)
0.11 RT
done
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C)
1.1 RT
done
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D)
0.01 RT
done
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View Answer play_arrow
If \[\Delta {{H}_{f}}\] of \[{{C}_{2}}{{H}_{4}}\] and \[{{C}_{2}}{{H}_{6}}\] are \[{{x}_{1}}\,and\text{ }{{x}_{2}}\] \[Kcal\text{ }mo{{l}^{-1}}\], then heat of hydrogenation of \[{{C}_{2}}{{H}_{4}}\] is-
A)
\[{{\text{x}}_{1}}+{{x}_{2}}\]
done
clear
B)
\[{{x}_{1}}-{{x}_{2}}\]
done
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C)
\[{{x}_{2}}-{{x}_{1}}\]
done
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D)
\[{{x}_{1}}+2{{x}_{2}}\]
done
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View Answer play_arrow
At 300 K the half life of a sample of a gaseous compound initially at 1 atm is 100 sec. When the pressure is 0.5 atm the half life is 50 sec. The order of reaction is-
A)
0
done
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B)
1
done
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C)
2
done
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D)
3
done
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View Answer play_arrow
D-glucose and D-fructose all form the same osazone derivative because all of them have:
A)
The same configuration at \[C-5\]
done
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B)
The same constitution at \[C-1\] and \[C-2\]
done
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C)
The same constitution overall
done
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D)
The same constitution and configuration at \[C-3,\text{ }C-4,\text{ }C-5\text{ }and\text{ }C-6\] but different constitution and configuration at \[C-1\] and \[C-2\] which becomes identical in osazone formation
done
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View Answer play_arrow
What could be the product for the following reaction?
A)
done
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B)
done
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C)
done
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D)
done
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View Answer play_arrow
Which of the following does not react with sodium bisulphite?
(I) HCHO (II) \[C{{H}_{3}}CO{{C}_{2}}{{H}_{5}}\] (III) (IV)
A)
(III) and (IV)
done
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B)
(II) and (IV)
done
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C)
(I) only
done
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D)
All reacts
done
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View Answer play_arrow
The IUPAC name of
is:
A)
2, 3-Methyl-1 -ethylcyclohex-4-ene
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B)
5-Ethyl-3, 4-dimethylcyclohex-1-ene
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C)
4-Ethyl-5, 6-dimethylcyclohex-1-ene
done
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D)
1-Ethyl-2, 3-dimethylcyclohex-4-ene
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View Answer play_arrow
An ice cube at \[0.00{}^\circ C\] is placed in 200 g of distilled water at\[25{}^\circ C\]. The final temperature after the ice completely melted is\[5{}^\circ C\]. What is the mass of the ice cube? \[(\Delta {{H}_{fus}},=340\,{{g}^{-1}},\,\,{{C}_{p}}=4.18\,J\,\,{{g}^{-1}}\,{}^\circ \,{{C}^{-1}})\]
A)
23.6g
done
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B)
36.3 g
done
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C)
50.0 g
done
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D)
800g
done
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View Answer play_arrow
\[C{{H}_{2}}=CH-C\equiv CH\] on reaction with 1 mole of DBr gives:
A)
\[C{{H}_{2}}=CH-CBr=CHD\]
done
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B)
\[C{{H}_{2}}\left( Br \right)-CHDC\equiv CH\]
done
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C)
\[DC{{H}_{2}}-CHBrC\equiv CH\]
done
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D)
\[C{{H}_{2}}=CH-CD=CHBr\]
done
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View Answer play_arrow
The acidity order of the protons (FT) in each of the following is:
A)
(i) > (ii) > (iii)
done
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B)
(ii) > (iii) > (i)
done
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C)
(i) > (iii) > (ii)
done
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D)
(iii) > (i) > (ii)
done
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View Answer play_arrow
A)
done
clear
B)
done
clear
C)
done
clear
D)
done
clear
View Answer play_arrow
Anisole is treated with HI under two different conditions \[C+D\text{ }\xleftarrow{^{HI(g)}}~{{C}_{6}}{{H}_{5}}OC{{H}_{3}}\xrightarrow{Conc.\,HI}\,\,A\,\,+\,\,B\,\] The nature of A to D will be:
A)
A and B are \[C{{H}_{3}}I\] and \[{{C}_{6}}{{H}_{5}}OH\] while C and D are \[C{{H}_{3}}OH\] and\[{{C}_{6}}{{H}_{5}}I\].
done
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B)
A and B are \[C{{H}_{3}}OH\] and\[{{C}_{6}}{{H}_{5}}I\], while C and D are \[C{{H}_{3}}I\] and \[{{C}_{6}}{{H}_{5}}OH\].
done
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C)
Both A and B as well as both C and D are \[C{{H}_{3}}I\] and \[{{C}_{6}}{{H}_{5}}OH\]
done
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D)
A and B are \[C{{H}_{3}}I\] and\[{{C}_{6}}{{H}_{5}}OH\], while there is no reaction in the second case
done
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View Answer play_arrow
A)
done
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B)
done
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C)
done
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D)
done
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View Answer play_arrow
The reaction
is an example of:
A)
Oxidation
done
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B)
Reduction
done
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C)
Both
done
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D)
Aldol condensation
done
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View Answer play_arrow
Identify compound [X] in the given reaction \[Me-C\equiv C-H\xrightarrow[dil.\,{{H}_{2}}S{{O}_{4}}]{1%\,HgS{{O}_{4}}}[{{P}_{1}}]\,\xleftarrow[{{H}^{\oplus }}]{KMn{{O}_{4}}}[X]\]
A)
done
clear
B)
done
clear
C)
done
clear
D)
done
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View Answer play_arrow
The major product is :
A)
done
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B)
done
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C)
done
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D)
done
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View Answer play_arrow
Which of the following statements is correct regarding the slag obtained during the extraction of a metal like copper or iron?
A)
The slag is lighter and lower melting than the metal
done
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B)
The slag is heavier and lower melting then the metal
done
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C)
The slag is lighter and higher melting than the metal
done
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D)
The slag is heavier and higher melting than the metal
done
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View Answer play_arrow
Product mixture \[\xrightarrow{{{O}_{3}}/Zn-{{H}_{2}}O}\] Final product mixture The final product mixture contains:
A)
\[C{{H}_{3}}CHO\,\,+\,\,C{{H}_{3}}COC{{H}_{3}}\]
done
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B)
\[C{{H}_{3}}CHO+C{{H}_{3}}C{{H}_{2}}CHO+HCHO\]
done
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C)
\[C{{H}_{3}}CHO\,\text{ }HCHO\]
done
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D)
\[C{{H}_{3}}CHO+C{{H}_{3}}COC{{H}_{3}}+HCHO\]
done
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View Answer play_arrow
Select incorrect statement-
A)
\[L{{i}_{2}}C{{O}_{3}}\] is only sparingly soluble in water and no \[LiHC{{O}_{3}}\] has been isolated
done
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B)
\[{{K}_{2}}C{{O}_{3}}\] cannot be made by solvay?s process
done
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C)
\[L{{i}_{2}}C{{O}_{3}}\] and \[MgC{{O}_{3}}\] both are thermally unstable
done
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D)
Carbonates of Ca & Mg are precipitated on adding calgon to water
done
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View Answer play_arrow
Select incorrect statement-
A)
Stability of superoxides of alkali metals increases with increase in size of the metal ion
done
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B)
Not all bicarbonates of IIA exist in solution
done
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C)
Increase in stability in is due to stabilisation of large anions by larger cations through lattice energy effects
done
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D)
The low solubility of LiF is due to its high lattice energy whereas low solubility of CsI is due to smaller hydration energy
done
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View Answer play_arrow
The hybridiszation present in \[I{{F}_{3}}\] is:
A)
\[\text{s}{{\text{p}}^{\text{3}}}\text{d}\]
done
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B)
\[s{{p}^{3}}\]
done
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C)
\[s{{p}^{3}}{{d}^{2}}\]
done
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D)
\[s{{p}^{3}}{{d}^{3}}\]
done
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View Answer play_arrow
Calculate the mass of anhydrous HCl in 10 ml of concentrated HCl \[\left( d=1.2\text{ }g/ml \right)\] solution having \[37%\] HCl by weight.
A)
4.44 g
done
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B)
4.44 mg
done
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C)
\[4.44\,\,\times \,\,{{10}^{-3}}\,g\]
done
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D)
\[0.444\text{ }\mu g\]
done
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View Answer play_arrow
Which of the following is not the characteristic of interhalogen compounds?
A)
They are more reactive than halogens
done
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B)
They are quite unstable but none of them is explosive
done
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C)
They are covalent in nature
done
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D)
They have low boiling points and are highly volatile
done
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View Answer play_arrow
Most favourable conditions for electrovalent bonding are-
A)
Low ionisation potential of one atom and high electron affinity of the other atom
done
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B)
High electron affinity and high ioinisation potential of both the atoms
done
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C)
Low electron affinity and low ionization potential of both the atoms
done
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D)
High ionisation potential of one atom and low electron affinity of the other atom
done
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View Answer play_arrow
The dissolution of \[Al{{\left( OH \right)}_{3}}\] by a solution of NaOH results in the formation of:
A)
\[{{\left[ Al{{\left( {{H}_{2}}O \right)}_{4}}{{\left( OH \right)}_{2}} \right]}^{+}}\]
done
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B)
\[\left[ Al{{\left( {{H}_{2}}O \right)}_{3}}{{\left( OH \right)}_{3}} \right]\]
done
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C)
\[{{\left[ Al{{\left( {{H}_{2}}O \right)}_{2}}{{\left( OH \right)}_{4}} \right]}^{-}}\]
done
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D)
\[\left[ Al{{\left( {{H}_{2}}O \right)}_{6}}{{\left( OH \right)}_{3}} \right]\]
done
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View Answer play_arrow
Methane is quite stable whereas silane is unstable? Because-
A)
C ? C bond energy is large greater than Si ? Si bond energy
done
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B)
Si ? H bond energy is much lower than C ? H bond energy
done
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C)
Si has vacant p orbitals which are more susceptible for nucleophilic attack
done
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D)
All of above reasons
done
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View Answer play_arrow
\[K{{O}_{2}}\] (potassium super oxide) is used in oxygen cylinders in space and submarines because it-
A)
Eliminates nitrogen
done
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B)
Eliminates moisture
done
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C)
Absorbs \[C{{O}_{2}}\]
done
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D)
Produce ozone
done
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View Answer play_arrow
Which of the following is correct-
A)
Solubility: \[BeS{{O}_{4}}>MgS{{O}_{4}}>CaSO4\]
done
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B)
Reducing character: \[Li<Na<K<Rb<Cs\]
done
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C)
Thermal stability: \[BeC{{O}_{3}}>MgC{{O}_{3}}>CaC{{O}_{3}}\]
done
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D)
\[M.P.:LiF>NaF>KF>RbF\]
done
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View Answer play_arrow
In the Baeyer's process-
A)
\[A{{l}_{2}}{{O}_{3}}\] goes into solution as soluble \[Al{{\left( OH \right)}_{4}}\] while other basic oxides as \[Ti{{O}_{2}}\] and \[F{{e}_{2}}{{O}_{3}}\] remain insoluble
done
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B)
\[A{{l}_{2}}{{O}_{3}}\] changes to AlN which in turn decomposed by \[{{H}_{2}}O\].
done
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C)
\[A{{l}_{2}}{{O}_{3}}\] changes to \[A{{l}_{2}}{{\left( C{{O}_{3}} \right)}_{3}}\] which changes to \[AlC{{l}_{3}}\]
done
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D)
Cryolite is added to lower the melting point of bauxite
done
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View Answer play_arrow
IUPAC name of \[\left[ Pt{{\left( N{{H}_{3}} \right)}_{3}}\left( Br \right)\left( N{{O}_{2}} \right)Cl \right]Cl\] is-
A)
Triamminechlorobromonitroplatinum (IV) chloride
done
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B)
Triamminebromonitrochloroplatinum (IV) chloride
done
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C)
Triamminebromochloronitroplatinum (IV) chloride
done
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D)
Triamminenitrochlorobromoplatinum (IV) chloride
done
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View Answer play_arrow
\[A{{g}^{+}}\] forms many complexes, some of these are \[{{\left[ Ag{{\left( N{{H}_{3}} \right)}_{2}} \right]}^{+}}\], \[{{\left[ Ag{{\left( CN \right)}_{2}} \right]}^{-}}\] and \[{{\left[ Ag{{\left( {{S}_{2}}{{O}_{3}} \right)}_{2}} \right]}^{3-}}\]-. Which of the following statement is true-
A)
In these complexes, \[A{{g}^{+}}\] is a lewis base
done
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B)
The hybridisation of \[A{{g}^{+}}\] is \[s{{p}^{2}}\]
done
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C)
The \[A{{g}^{+}}\] complexes are good reducing agents
done
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D)
These complexes are all linear
done
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View Answer play_arrow
Which of the following regarding \[{{N}_{2}}O\] is not correct?
A)
The solubility of \[{{N}_{2}}O\] in greater is cold solution as compared to a hot solution
done
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B)
The solubility of \[{{N}_{2}}O\] is more in hot solution as compared to a cold solution
done
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C)
The gas \[{{N}_{2}}O\] is known as laughing gas
done
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D)
Nitrous oxide mixed with oxygen is used as anaesthetic
done
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View Answer play_arrow
In plants, mosaic formation, leaf rolling and curling, yellowing of plant parts, vein clearing. dwarfing and stunted growth, necrosis etc. are the symptoms of
A)
bacterial diseases
done
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B)
mycoplasmal diseases
done
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C)
viral diseases
done
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D)
fungal diseases
done
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View Answer play_arrow
Cnidoblast consist of-
A)
Stinging capsule
done
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B)
Nematocyte
done
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C)
Stinging capsule or nematocyte
done
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D)
None of above
done
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View Answer play_arrow
Medusa formed by-
A)
Sexual reproduction
done
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B)
Asexual reproduction
done
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C)
Parthenogenesis
done
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D)
Regeneration
done
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View Answer play_arrow
In Aschehelminthese excretory tube removes body wastes from........ through excretory pore
A)
Blood
done
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B)
Tissue
done
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C)
Body cavity
done
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D)
Haemolymph
done
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View Answer play_arrow
Choose how many of following statement is/are not true?
[A] In cephalochordate and urochordate tail persist throughout their life [B] In echinodermata mouth is ventral and anus is dorsal [C] Medusa is free swimming while polyp is sessile [D] Planaria and fasciola have high power regeneration
A)
Two
done
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B)
One
done
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C)
Four
done
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D)
Three
done
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View Answer play_arrow
Hypostome is-
A)
Single opening of paragastric cavity of coelenterates
done
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B)
Single opening of gastro-vascular cavity of coelenterates
done
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C)
Single opening of gastro-vascular cavity of porifera
done
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D)
Single opening of spongocoel of porifera
done
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View Answer play_arrow
Poisionous snakes are-
A)
Bangarus
done
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B)
Naja
done
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C)
Vipera
done
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D)
All of above
done
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View Answer play_arrow
Name reptilian refer to-
A)
Creeping mode of locomotion
done
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B)
Dry and comified skin
done
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C)
Tympanum represents ear
done
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D)
All of above
done
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View Answer play_arrow
Hind limbs of aves are modified for-
A)
Walking
done
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B)
Swimming
done
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C)
Clasping the tree branches
done
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D)
All of above
done
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View Answer play_arrow
Claspers are-
A)
Present in pelvic fins of carchardon
done
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B)
Present in pelvic fins of pterophyllum
done
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C)
Present in pectoral fins of scoliodon
done
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D)
Present in pectoral fins of exocoetus
done
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View Answer play_arrow
Maximum mode of respiration present in-
A)
Mammals
done
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B)
Aves
done
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C)
Reptile
done
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D)
Amphibia
done
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View Answer play_arrow
Match List-I with List-II and choose the correct answer-
List-I (PGR) List-II (Application) A. Increase yield of sugarcane i. Zeatin B. Promotes lateral shoot growth ii. \[G{{A}_{3}}\] C. Sprouting of potato tuber iii. ABA D. Inhibites seed germination iv. Ethylene
A)
A-iv B-i C-ii D-iii
done
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B)
A-iv B-ii C-iii D-iv
done
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C)
A-ii B-i C-iv D-iii
done
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D)
A-ii B-I C-iii D-iv
done
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View Answer play_arrow
Which of the following chemicals are respectively antiauxin and auxin precursor?
A)
NAA, Acetyl CoA
done
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B)
Tryptophan, Methionin
done
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C)
Morphectins, Tryptophan
done
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D)
MH, Acetyl CoA
done
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View Answer play_arrow
Choose the enzyme participate in both the process of photosynthesis and cell respiration-
A)
Pyruvate dehydrogenase
done
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B)
ATPase
done
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C)
Cytochrome oxidase
done
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D)
PEPcase
done
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View Answer play_arrow
Net gain of ATP from glycolysis during aerobic respiration-
A)
2
done
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B)
6
done
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C)
10
done
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D)
4
done
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View Answer play_arrow
Choose the correct order of energy of oxidation of following respiratory substrates-
A. 1 gm of fat B. 1 gm of protein C. 1 gm of glucose D. 0.5 gm of protein & 0.5 gm of glucose
A)
\[A>B>C>D\]
done
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B)
\[A>B>D>C\]
done
clear
C)
\[B>A>C>D\]
done
clear
D)
\[A>D>C>B\]
done
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View Answer play_arrow
In \[{{C}_{4}}\] plants the photolysis of water and \[C{{O}_{2}}\] fixation into glucose occurs respectively at-
A)
Both in bundle sheeth cells
done
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B)
Bundle sheath cells, Mesophyll cells
done
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C)
Mesophyll cells, Bundle sheath cells
done
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D)
Both in mesophyll cells
done
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View Answer play_arrow
\[{{C}_{4}}\] plants are better than \[{{C}_{3}}\] plants in which of the following parameters-
[a] \[C{{O}_{2}}\] assimilation into glucose [b] Maximizing transpirational loss of water [c] Utilization of assimilatory power in \[C{{O}_{2}}\] assimilation [d] Minimizing transpirational loss
A)
A, B, C, D
done
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B)
A, B, C
done
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C)
A, D
done
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D)
B, D
done
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View Answer play_arrow
The trophic levels of Nepenthes, Utricularia, Drosera are-
A)
Primary producer
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B)
Primary consumers
done
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C)
Secondary consumers
done
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D)
Both [a] and [c]
done
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View Answer play_arrow
A farmer supplies Ca, Mg and Fe regularly to his crop field and yet he observed that the plant show deficiency symptoms like chlorosis and necrosis. The probable cause is-
A)
Molybdenum is deficient in plants
done
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B)
Mangnese may be more than critical concentration
done
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C)
Roots not able to properly absorb these minerals
done
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D)
Radial conduction of minerals should be inhibited
done
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View Answer play_arrow
Choose the number of incorrect statement-
[a] Cell shrink in hypotonic solutions and swells in hypertonic solution, [B] Imbibition is a special type of diffusion when water is absorbed by living cell [C] Most of water flows in the roots occurs via the symplast [D] Food translocation is mainly by symplast while water conduction is mainly by apoplast
A)
2
done
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B)
3
done
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C)
4
done
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D)
1
done
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View Answer play_arrow
In the developmental history of mammalian heart, it is observed that it passes through a two chambered fish like heart, three chambered frog like heart and finally four chambered stage. To which hypothesis can this above cited statement be approximated?
A)
Lamarck?s principle
done
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B)
Mendelian principle
done
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C)
Biogenetic law
done
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D)
Hardy Weinberg law
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View Answer play_arrow
Which of the following is not ?stress? for plants?
A)
Herbivores
done
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B)
Drought
done
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C)
Transpiration
done
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D)
Water logging
done
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View Answer play_arrow
Climax stage is achieved quickly in secondary succession as compared to primary succession as secondary succession-
A)
It occurs on bare area
done
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B)
Occurs after primary succession
done
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C)
Occur on area where previously build organic matter is present
done
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D)
Autotrophs are pioneer
done
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View Answer play_arrow
Select the incorrect match-
A)
Hydrilla - Rooted submerged hydrophyte
done
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B)
Nymphea - Non rooted floating hydrophyte
done
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C)
Vallisenaria - Rooted submerged hydrophyte
done
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D)
Typha - Rooted floating hydrophyte
done
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View Answer play_arrow
What will happen to an ecosystem if all herbivores are eliminated?
A)
Complete ecosystem will unstable and functioning of ecosystem damage
done
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B)
Population of carnivores will decrease
done
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C)
Rate of decomposition will decrease
done
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D)
No effect on stability of ecosystem as producer and decomposers can maintains the structure and function of ecosystem
done
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View Answer play_arrow
In Disaccharide, if the reducing group of monosaccharide are bonded than these are non- reducing sugar, which of the following is a non-reducing sugar-
A)
done
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B)
done
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C)
done
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D)
done
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View Answer play_arrow
Which is true regarding DNA polymerase?
A)
It is DNA dependant DNA polymerase
done
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B)
It uses RNA or DNA template to catalyse the polymerization of deoxynucleotide
done
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C)
It can start DNA replication
done
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D)
[a] & [b] Both
done
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View Answer play_arrow
Fluid nature of membrane is important in-
A)
Cell growth and division
done
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B)
Endocytosis
done
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C)
Secretion
done
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D)
All of the above
done
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View Answer play_arrow
How many of the following are not true regarding mitochondria:
[a] Matrix possess single circular DNA [b] It has protein synthesizing enzyme [c] Inner membrane form discontinous boundary [d] Mitoribosome are similar to eukaryotic ribosome
A)
Three
done
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B)
Four
done
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C)
One
done
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D)
Two
done
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View Answer play_arrow
Nucleosome contains-
A)
RNA
done
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B)
DNA
done
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C)
Non-histone protein
done
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D)
All of the above
done
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View Answer play_arrow
Bivalent are formed in ......A........stage but they are clearly visible in ......B........stage. What are A & B respectively-
A)
Pachytene & Zygotene
done
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B)
Zygotene & Pachytene
done
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C)
Pachytene & Diplotene
done
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D)
Zygotene & Metaphase-I
done
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View Answer play_arrow
Read the following statements about cell division and select the correct ones
(i) M phase represent the phase when actual cell division occurs and I phase represents the phase between two successive M phase (ii) In the 24 hours average duration of cell cycle of a human cell, cell division proper lasts for only about an hour (iii) M phase constitutes more than \[95%\] of the duration of cell cycle
A)
(i) and (ii)
done
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B)
(ii) and (iii)
done
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C)
(i) and (iii)
done
clear
D)
(i), (ii) and (iii)
done
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View Answer play_arrow
What is true for 'lactational amenorrhea'?
(i) It means absence of menstruation
(ii) Ovulation does not occur during the lactational period.
(iii) Chances of contraception are almost nil upto six months following parturition.
(iv) Side-effects are almost nil
(v) Contraceptive efficiency reduces after the period of intense lactation.
(vi) It is a natural method of contraception
(vii) It increases phagocytosis of sperms
A)
(ii), (iii), (iv) (v) and (vi)
done
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B)
(i), (ii), (iii) and (iv)
done
clear
C)
(ii), (iii), (iv) (v) and (vii)
done
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D)
(i), (ii), (iii) (iv) (v) and (vi)
done
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View Answer play_arrow
Match the Column-I with Column-II and select the option given below-
Column-I
Column-II
M
Plum
A.
Perigynous
N
Guava
B.
Epigynous
O
Mustard
C.
Tetradynamous
P
Lady's Finger
D.
Monoadelphous
A)
M = A; N = B; O = D; P = E
done
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B)
M = A; N = B; O = C; P = E
done
clear
C)
M = B; N = A; O = C; P = E
done
clear
D)
M = B; N = A; O = D; P = E
done
clear
View Answer play_arrow
How many of the following show the placentation given in figure-
Onion, Lemon, wheat, cabbage Primrose, Sunflower, Gulmohar, China Rose, Tulip
A)
Six
done
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B)
Four
done
clear
C)
Five
done
clear
D)
Seven
done
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What can be the correct floral formula of an actinomorphic flower which is bisexual, hypogynous with five free sepal, five free petal, indefinite free stamen and marginal placentation.
A)
Data insufficient
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B)
done
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C)
done
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D)
[b] & [c] are possible
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Simple permanent living tissues which are made up of thin-walled similar isodiametric cells are called-
A)
parenchyma tissues
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B)
collechyma tissues
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C)
sclerenchyma tissues
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D)
meristematic tissues
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From evolutionary point of view tracheids and sieve cells are more primitive than vessels and sieve tube respectively. The angiosperms have which of the following attributes of xylem?
A)
vessel and sieve tube only
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B)
tracheids, vessels and sieve tube
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C)
vessel, sieve cells and sieve tube
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D)
tracheids, vessel and sieve cells
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In leaf, the vascular bundles are found in the-
A)
Veins
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B)
Palisade tissue
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C)
Lower epidermis
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D)
Upper epidermis
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Pollen grains may be viable for months in plants of
A)
Rosaceae
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B)
Leguminosae
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C)
Solanaceae
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D)
All the above
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The largest cell of female gametophyte is-
A)
Egg Cell
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B)
Central Cell
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C)
Antipodal Cell
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D)
Synergid Cell
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To the developing embryosac in megasporangium, the nutrition is provided by:
A)
Tapetum
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B)
Endosperm
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C)
Nucellus
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D)
Cotyledon
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A plant breeder employ technique of emasculation
A)
To cover the flower with a bag
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B)
To prevent self-pollination
done
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C)
To prevent stamen from being contaminated
done
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D)
To produce female plant
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Zoospores of brown algae are-
A)
Pear shaped with two equal laterally inserted flagella
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B)
Pear shaped with two equal anterior inserted flagella
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C)
Pear shaped with two unequal laterally inserted flagella
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D)
Pear shaped with two unequal anterior inserted flagella
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An intervening long lived dikaryophase occurs in the life cycle of-
A)
Morels, Truffles
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B)
Bread mould, Mucor
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C)
Ustilago and Puccinia
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D)
Yeast, Penicillium
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Select the correct options w.r.t Protonema of Mosses-
[a] Develops directly from spore [b] Creeping, green, branched and filamentous stage [c] Posses sex organs [d] Its lateral bud develops into Leafy stage [e] Helps in vegetative reproduction by fragmentation and budding
A)
b, c, d and e
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B)
a, b, d and e
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C)
a, b and d
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D)
b, c and d
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Choose incorrect option w.r.t. site of meiosis-
A)
Claviceps - Ascus
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B)
Ustilago - Basidium
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C)
Rhizopus - Zygospore
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D)
Colletotrichum - Oospore
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Which of the following can be regarded as seedless vascular plants?
A)
Angiosperms
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B)
Gymriosperms
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C)
Bryophytes
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D)
Pteridophytes
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Read carefully the following statement about the sexual reproduction in homosporous ferns-
I. Water is essential for fertilization. II. Male gametophyte bears antheridia, while female gametophyte bears archegonium, which produces antherozoids and egg cell, respectively. III. Antherozoids and egg cell fuses to give rise zygote. Zygote develops into young embryo. Embryo give rise to sporophyte. Which of the statements given above are correct?
A)
I and II
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B)
II and III
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C)
I and III
done
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D)
I, II and III
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Read carefully the following statements about pteridophytes.
I. They are called vascular cryptogams. II. They produce spores rather than seeds. III. They are used for medicinal purposes. IV. They are used as soil binders. V. They are frequently grown as ornaments. Which of the statements given above are correct?
A)
I, II and V
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B)
II, IV and V
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C)
II, III, IV and V
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D)
I, II, III, IV and V
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Select the odd one out w.r.t. category-
A)
Primata
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B)
Arthropoda
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C)
Sapindales
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D)
Poales
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Arrange the following taxa in increasing order of common character w.r.t. housefly-
[a] Musca [b] Insecta [c] Chordata [d] Muscidae [e] Diptera
A)
c < b < e < d < a
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B)
b < e < d < a
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C)
b > e > d > a
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D)
c > b > e > d > a
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What generally maintains the electrical charge across the neuronal membrane-
A)
\[N{{a}^{+}}\,-{{K}^{+}}\] pump
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B)
Action potential
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C)
Excited potential
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D)
Voltage - gated channels
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Which of the following statements is correct?
A)
The electrical potential difference across the resting plasma membrane is called as the resting potential
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B)
The impulse is action potential
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C)
\[N{{a}^{+}}\] ions are responsible for generating an action potential
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D)
All
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Hormone responsible for regulation of calcium & phosphate is secreted by-
A)
Follicular cells
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B)
Aldosterone
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C)
Oxytocin
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D)
Parathyroide
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Disorders caused by hypersecrtion of concerned hormone-
A)
Critinism, diabetes mellitus
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B)
Ricketes & diabetes insipidus
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C)
Gigantism & exophathalamic goitre
done
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D)
Addison disease & cushing disease
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Retinal cells involved in colour vision are-
A)
Cones
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B)
Rods
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C)
Neurons
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D)
Neuroglial cells
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Utriculus is the part of internal ear or membranous labyrinth which forms-
A)
Lower chamber and is concerned with maintenance of equilibrium
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B)
Lower chamber and is concerned with transmission of sound
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C)
Upper chamber and is concerned with maintenance of equilibrium
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D)
Upper chamber and is concerned with transmission of sound
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The figure depicts an eye defect and its correction. Select the most appropriate alternative from the following that best explain this-
A)
Myopia, concave lens of suitable focal length
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B)
Hypermetropia, concave lens of suitable focal length
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C)
Myopia, concvex lens of suitable focal length
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D)
Hypermetropia, convex lens of suitable focal length
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During the process of digestion, food is exposed to a range of pH. The relative pH of fluids in I, II and III regions of the alimentary canal shown in this diagram is-
A)
I < II > III
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B)
I > II > III
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C)
I < II < III
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D)
I > II < III
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Ependymal epithelum is made up of?
A)
Ciliated cuboidal
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B)
Ciliated squamous
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C)
Simple ciliated columnar
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D)
Stratified cuboidal
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Suppose evolution on earth has occurred in such a way that there are 96 amino acids instead of 20. DNA has 12 different types of bases and DNA synthesis occur in the same way as today. The minimum number of bases per DNA codon would be-
A)
12
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B)
8
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C)
2
done
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D)
3
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Select the correct choice which represents the substance which do not contain any enzyme but important in fat digestion and the organ from where it is secreted-
A)
Bile - Pancreas
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B)
Saliva - Salivary gland
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C)
Bile - Liver
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D)
Gastric juice - Stomach
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Which statement is false?
A)
Deficiency of vita. 'E' is too one of the cause of anaemia
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B)
The hypothalamus is a region of the hind brain important in regulating cardiovascular function, such as heart rate and blood pressure
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C)
In typical reflex arcs, impulses in sensory neurons activate motor neurons via intemeurons
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D)
Marasmus is caused by protein deficiency with low calorific value diet
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Heparin is produced by-
A)
Kidney cells
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B)
Blood cells
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C)
Liver cells
done
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D)
Bone marrow
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Diazepam (Valium) suppress which part of out body-
A)
Reticular activating system of brain
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B)
T-killer cell
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C)
B-cell
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D)
Pain receptor
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Which of following anticancer drug used in AIDS-
A)
Cyclosporin
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B)
Vincristin
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C)
Zidovudine
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D)
Alprazolam
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Match the following
Column-I Column-II [A] \[\phi \,\,\times \,\,174\] (i) 48502 bp [B] Lambda phage (ii) 5386 Nucleotides [C] E.coli (iii) \[6.6\times {{10}^{9}}\,bp\] [D] Human somatic cell (iv) \[4.6\times {{10}^{6}}\,bp\]
A)
A-(i) B-(ii) C-(iv) D-(iii)
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B)
A-(ii) B-(i) C-(iv) D-(iii)
done
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C)
A-(i) B-(ii) C-(iii) D-(iv)
done
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D)
A-(iv) B-(iii) C-(ii) D-(i)
done
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Mimosaceae can be distinguished from Caesalpiniaceae on the basis of
A)
Number of anthers
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B)
Adhesion of anthers
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C)
Characters of carpels
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D)
Characters of calyx
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Due to the cross between \[TTRr\,\,\times \,\,ttrr\] the resultant progenies showed how many percent plants tall, red flowered-
A)
\[50%\]
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B)
\[75%\]
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C)
\[25%\]
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D)
\[100%\]
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Mangolian idiots are due to trisomy in 21st chromosome is called-
A)
Down's syndrome
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B)
Turner's syndrome
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C)
Kleinfelters syndrome
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D)
Triplex syndrome
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Which of the following statements is correct?
A)
Animals can show mitotic divisions in both haploid
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B)
After S phase the number of chromosomes becomes double i.e. 2n to 4n
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C)
During the \[{{G}_{2}}\] phase, proteins are synthesized in preparation for mitosis while cell growth continues.
done
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D)
S or synthesis phase marks the period during which RNA synthesis takes place.
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Genetics modified crops (GMC) are usefull in agriculture because-
A)
They are more tolerant to abiotic stresses
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B)
They increase reliance on chemical pesticide
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C)
They have reduced nutrilitional value
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D)
All the above
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In RNA interference (RNA)-
A)
The silencing of a specific mRNA due to a complementary dsRNA molecule binds to and prevent translation of the mRNA
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B)
The silencing of a specific mRNA due to ds DNA
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C)
The silencing of a specific mRNA due to tRNA
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D)
All the above.
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In which stage of cell cycle, DNA replication occurs-
A)
\[{{G}_{1}}\,\,-\,\,phase\]
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B)
S - phase
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C)
\[{{G}_{2}}\,\,-\,\,phase\]
done
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D)
M - phase
done
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Which photosynthetic pigment converts nascent oxygen to molecular oxygen:
A)
Chlorophyll-a
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B)
Carotenoids
done
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C)
Phycobilins
done
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D)
Chlorophyll-b
done
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What is true for plasmid?
A)
Plasmids are widely used in gene transfer
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B)
These are found in virus
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C)
Plasmid contain gene for vital activities
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D)
These are main part of chromosome
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Blood carries the \[C{{O}_{2}}\] in 3 forms. The correct percentages of \[C{{O}_{2}}\] in these forms are-
A)
As carbinohaemoglobin in RBC As bicarbonates Dissolved form in plasma 20-25% 70% 7%
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B)
As carbinohaemoglobin in RBC As bicarbonates Dissolved form in plasma 70% 20-25% 7%
done
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C)
As carbinohaemoglobin in RBC As bicarbonates Dissolved form in plasma 20-25% 7% 70%
done
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D)
As carbinohaemoglobin in RBC As bicarbonates Dissolved form in plasma 7% 20-25% 70%
done
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View Answer play_arrow
Identify correct statement-
(i) Chest expands because diaphragm expands (ii) Chest expands because air enters into lungs (iii) The affinity ofcarbondioxide for haemoglobin is higher than the affinity of oxygen for haemoglobin (iv) Carbaminohaemoglobin is a more stable compound than carboxyhaemoglobin
A)
(i) & (iv)
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B)
(iii) only
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C)
(ii) & (iii)
done
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D)
None
done
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The third stage of parturition is called "after- birth". In this stage
A)
excessive bleeding occurs
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B)
fetus is born and cervix and vagina contraction to normal condition happens
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C)
fetus is born and contraction of uterine wall prevents excessive bleeding
done
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D)
placenta is expelled out
done
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50 primary spermatocytes give rise to-
A)
200 spermatocytes
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B)
50 spermatocytes
done
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C)
200 spermatozoa
done
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D)
50 spermatozoa.
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Read the following statements regarding the various techniques used in cancer detection
(i) Cancer detection is based on biospy and histophathological studies of the tissue, and blood and bone marrow tests for increased cell counts in case of leukaemia (ii) In biopsy, a piece of the suspected tissue cut into thin sections is stained and examined under microscope by a pathologist (iii) Techniques like radiography (use of X-rays), CT (computed tomography) and MRI (magnetic resonance imaging) are very useful to detect cancers of the internal organs. (iv) Computed tomography uses strong magnetic fields and non-ionising radiations to detect physiological changes in living tissues. (v) MRI uses X-rays and ionising radiation to generate a 3-D image of the internal structure of an object. Which of the above statements are incorrect?
A)
(i) and (iii)
done
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B)
(ii) and (iv)
done
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C)
(iii) and (iv)
done
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D)
(iv) and (v)
done
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In foetus, ductus arteriosus connects
A)
aorta and pulmonary artery
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B)
aorta and pulmonary vein
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C)
hepatic and pancreatic duct
done
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D)
pulmonary artery and vein
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One of the following is not a component of kidney stones-
A)
calcium oxalate
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B)
calcium phosphate
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C)
cholesterol
done
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D)
none of above
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View Answer play_arrow
Which of the following statement is false?
A)
ADH helps in water elimination making urine hypotonic
done
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B)
Protein free fluid is filtered from blood plasma into the Bowman?s capsule
done
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C)
Glucose is actively reabsorbed in the proximal convoluted tubule
done
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D)
Henle?s loop plays an important role in concentrating the urine
done
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View Answer play_arrow
Identify the correct arrangement of periods of Palaeozoic era in ascending order in geological time scale
A)
Cambrian \[\to \] Devonian \[\to \] Ordovician \[\to \] Silurian \[\to \] Carboniferous \[\to \] Permian
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B)
Cambrian \[\to \] Ordovician \[\to \] Silurian \[\to \] Devonian \[\to \] Carboniferous \[\to \]Permian
done
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C)
Cambrian \[\to \] Ordovician \[\to \] Devonian \[\to \] Silurian \[\to \] Carboniferous \[\to \] Permian
done
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D)
Silurian \[\to \] Devonian \[\to \] Cambrian \[\to \] Ordovician \[\to \] Permian \[\to \] Carboniferous
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In the Oparin theory, the most important/ essential element was-
A)
Proteins
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B)
Oxygen
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C)
Amino acids
done
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D)
Hydrogen, ammonia and methane
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Consider the statements given below regarding contraception and answer as directed thereafter.
[a] Medical Termination of Pregnancy (MTP) during first trimester is generally safe [b] Generally chances of conception are nil until mother breast-feeds the infant upto two years [c] Intrauterine devices like copper-T are effective contraceptives [d] Contraceptive pills may be taken upto one week after coitus to prevent concention Which two of the above statements are correct?
A)
b, c
done
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B)
c, d
done
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C)
a, c
done
clear
D)
a, b
done
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View Answer play_arrow
Plants bend toward the light because-
A)
They need light for photosynthesis
done
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B)
They need light for respiration
done
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C)
Light attracts them
done
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D)
Cells on the shaded side elongate more
done
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