Three concentric spherical metallic shells A, B and C of radii a, b and c \[\left( a<b<c \right)\] have surface charge densities\[\sigma \], -\[\sigma \] and \[\sigma \] respectively. If the shells A and C are at same potential, then the correct relation between a, b and c is-
A)
\[a+c=b\]
done
clear
B)
\[b+c=a\]
done
clear
C)
\[a-b=c\]
done
clear
D)
\[a+b=c\]
done
clear
View Answer play_arrow
In the circuit shown in the figure, the potential difference across the \[4.5\text{ }\mu F\] capacitor-
A)
\[8\text{ }volt\]
done
clear
B)
\[6\text{ }volt\]
done
clear
C)
\[4\text{ }volt\]
done
clear
D)
\[\frac{8}{3}\,\,volt\]
done
clear
View Answer play_arrow
Shown in the figure below is a meter-bridge set up with null deflection in the galvanometer.
The value of the unknown resistor R is-
A)
\[13.75\,\,\Omega \]
done
clear
B)
\[220\,\,\Omega \]
done
clear
C)
\[110\,\,\Omega \]
done
clear
D)
\[55\,\,\Omega \]
done
clear
View Answer play_arrow
Four identical bulbs A, B, C, D are connected in a circuit as shown in figure. Now whenever any bulb fails, then it cannot conduct current through it. Then
Ideal Battery?
[a] Brightness of bulb C is highest [b] If C fails, brightness of bulb D increases [c] If C fails, brightness of all bulbs remain same [d] If A fails, B will not glow
Correct option is-
A)
a, c, d
done
clear
B)
a, b, d
done
clear
C)
c, d
done
clear
D)
b, d
done
clear
View Answer play_arrow
Two straight and long conductors AOB and COD are perpendicular to each other and carry currents of \[{{I}_{1}}\,\,and\,\,{{I}_{2}}\]. The magnitude of the magnetic field at a point P at a distance a from point O in a direction perpendicular to the plane ABCD is-
A)
\[\frac{{{\mu }_{0}}}{2\pi a}({{I}_{1}}+{{I}_{2}})\]
done
clear
B)
\[\frac{{{\mu }_{0}}}{2\pi a}({{I}_{1}}-{{I}_{2}})\]
done
clear
C)
\[\frac{{{\mu }_{0}}}{2\pi a}{{(I_{1}^{2}-I_{2}^{2})}^{1/2}}\]
done
clear
D)
\[\frac{{{\mu }_{0}}}{2\pi a}\frac{{{I}_{1}}{{I}_{2}}}{({{I}_{1}}+{{I}_{2}})}\]
done
clear
View Answer play_arrow
A 2 MeV proton is moving perpendicular to a uniform magnetic field of 2.5 T. The force on the proton is-
A)
\[2.5\times {{10}^{-10}}\,N\]
done
clear
B)
\[8\times {{10}^{-11}}\,N\]
done
clear
C)
\[2.5\times 10{{~}^{-11}}\,N\]
done
clear
D)
\[8\times {{10}^{-~12}}\,N\]
done
clear
View Answer play_arrow
In an ac circuit, the voltage applied is \[E={{E}_{0}}\] sin cot. The resulting current in the circuit is\[I={{I}_{0}}\,sin\left( \omega t-\pi /2 \right)\]. The power consumption in the circuit is-
A)
\[\sqrt{2}\,{{E}_{0}}{{I}_{0}}\]
done
clear
B)
\[\,\frac{{{E}_{0}}{{I}_{0}}}{\sqrt{2}}\]
done
clear
C)
\[\,\frac{{{E}_{0}}{{I}_{0}}}{2}\]
done
clear
D)
\[zero\]
done
clear
View Answer play_arrow
In a transformer, the no. of turns in the primary and secondary are 400 and 2000 respectively. The power input to the primary is 10 kW at 200 V. The efficiency of the transformer is\[90\,%\]. Then which is wrong
A)
The output voltage is 1000 V
done
clear
B)
The output power is 9 Kw
done
clear
C)
The current in the primary is 50 A
done
clear
D)
The current in the second is 10 A
done
clear
View Answer play_arrow
If three bulbs of 40 W, 60 W and 100 W are connected in series with a 200 V power supply, then-
[a] the potential difference will be maximum across the 40 W bulb [b] the current will be maximum through the 100 W bulb [c] the 40 W bulb has the maximum resistance [d] the current in the circuit is 1.2 A
Correct option is-
A)
a, b
done
clear
B)
b, c
done
clear
C)
a, c
done
clear
D)
c, d
done
clear
View Answer play_arrow
Two short dipoles \[p\widehat{k}\,\,and\,\,\frac{p}{2}\widehat{k}\] are located at (0, 0, 0) and (1m, 0,2m) respectively. The resultant electric field due to the two dipoles at the point (1 m, 0, 0) is-
A)
\[\frac{9p}{32\pi {{\in }_{0}}}\widehat{k}\]
done
clear
B)
\[\frac{-7p}{32\pi {{\in }_{0}}}\widehat{k}\]
done
clear
C)
\[\frac{-9p}{32\pi {{\in }_{0}}}\widehat{k}\]
done
clear
D)
\[\frac{4p}{32\pi {{\in }_{0}}}\widehat{k}\]
done
clear
View Answer play_arrow
Flux \[\phi \] (in weber) in a closed circuit of resistance \[10\,\Omega \] varies with time t (in seconds) according to the equation, \[\phi \,\,\text{=}\,\,\,6{{t}^{2}}-5t+1\]. The magnitude of the induced current in the circuit at \[t\,\,=\,\,0.25\text{ }s\] is-
A)
0.2 A
done
clear
B)
0.6 A
done
clear
C)
0.8 A
done
clear
D)
1.2 A
done
clear
View Answer play_arrow
The magnetic field due to a current carrying circular loop of radius 3 cm at a point on its axis at a distance of 4 cm from the centre is\[54\,\mu T\]. The magnetic field (in \[(in\,\,\mu T)\] at the centre of the loop will be
A)
250
done
clear
B)
150
done
clear
C)
125
done
clear
D)
72
done
clear
View Answer play_arrow
Which is diamagnetic material-
A)
Fe
done
clear
B)
Cu
done
clear
C)
Co
done
clear
D)
Cr
done
clear
View Answer play_arrow
A ray of monochromatic light is incident on the plane surface of separation between two media [a] and [b] with angle of incidence 'i' in the medium [a] and angle of refraction 'r' in the medium [b]. The graph shows the relation between sin r and sin i, then which of the following statements are correct-
A)
the speed of light in the medium [b] is \[\sqrt{3}\] times than in medium [a]
done
clear
B)
the speed of light in the medium [b] is \[\frac{1}{\sqrt{3}}\] times than in medium [a]
done
clear
C)
the total internal reflection can take place when the incidence is in medium [a]
done
clear
D)
the total internal can take place when the incidence is medium [b]
done
clear
View Answer play_arrow
An object O is placed between a concave mirror and a plane mirror so that the first image in both the mirrors coincide at I. What should be the position of centre of curvature of concave mirror
A)
A
done
clear
B)
B
done
clear
C)
C
done
clear
D)
O
done
clear
View Answer play_arrow
A beam of light consisting of red, green and blue colours is incident on a right-angled prism. The refractive indices of the material of the prism for the red, green and blue wavelengths are 1.39, 1.44 and 1.47 respectively. The prism will-
A)
separate the red colour from the green and blue colours
done
clear
B)
separate the blue colour from the red and green colours
done
clear
C)
separate all the three colours from one another
done
clear
D)
none of these
done
clear
View Answer play_arrow
A ray of unpolarised light is incident on a glass plate at the polarising angle\[57{}^\circ \]. Then-
A)
the reflected ray and the transmitted ray both will be completely polarized
done
clear
B)
the reflected ray will be completely polarized and the transmitted ray will be partially polarized
done
clear
C)
the reflected ray will be partially polarised and the transmitted ray will be completely polarized
done
clear
D)
the reflected and transmitted both rays will be partially polarized
done
clear
View Answer play_arrow
In a double-slit experiment, two parallel slits are illuminated first by light of wavelength 400 nm and then by light of unknown wavelength. The fourth-order dark fringe resulting from the known wavelength of light falls in the same place on the screen as the second-order bright fringe from the unknown wavelength. The value of unknown wavelength of the light is-
A)
900 nm
done
clear
B)
700 nm
done
clear
C)
300 nm
done
clear
D)
none of these
done
clear
View Answer play_arrow
A slit of width a is illuminated by red light\[(\lambda =6500\,\overset{{}^\circ }{\mathop{A}}\,)\]. The first minima for red light will fall at \[\theta =30{}^\circ \], when a will be-
A)
\[3250\,\,\overset{{}^\circ }{\mathop{A}}\,\]
done
clear
B)
\[6.5\times {{10}^{-4}}\,cm\]
done
clear
C)
\[1.3\,\,micron\]
done
clear
D)
\[2.6\times {{10}^{-4}}\,cm\]
done
clear
View Answer play_arrow
An electron is confined to a tube of length L. The electron?s potential energy in one half of the tube is zero, while the potential energy in the other half is 10 eV. If the electron has a total energy \[E=15\,\,eV\], then the ratio of the de- Broglie wavelength of the electron in the 10 eV region of the tube to that in the other half is-
A)
\[1/\sqrt{3}\]
done
clear
B)
\[\sqrt{3}\]
done
clear
C)
\[3\]
done
clear
D)
\[\frac{1}{3}\]
done
clear
View Answer play_arrow
In the diagram shown a uniform electric field E is applied in a direction perpendicular to plates as shown. The work function of metal plates is \[h\nu \] and incident light has photon energy\[2h\nu \]. What will be the maximum kinetic energy of \[{{e}^{-}}\] when reaching at plate 2?
A)
\[h\nu \]
done
clear
B)
\[h\nu +eEd\]
done
clear
C)
\[h\nu -eEd\]
done
clear
D)
\[2h\nu -eEd\]
done
clear
View Answer play_arrow
The mean lives of a radioactive element are 1620 yr and 405 yr for \[\alpha -emission\] and \[\beta -emission\] respectively. The mean-life of the composite event is
A)
\[1620+405\,\,yr\]
done
clear
B)
\[\frac{1620\times 405}{1620+405\,\,}yr\]
done
clear
C)
\[\sqrt{1620\times 405}\,yr\]
done
clear
D)
\[\frac{1620+405}{2\,\,}yr\]
done
clear
View Answer play_arrow
A radioactive element of mass number 214 at rest disintegrates by emitting an\[\alpha -particle\]. If E is the energy of the emitted \[\alpha -particle\], the energy of disintegration is:
A)
\[\frac{105}{107}\,E\]
done
clear
B)
\[\frac{107}{105}\,E\]
done
clear
C)
\[\frac{52}{51}\,E\]
done
clear
D)
\[\frac{51}{52}\,E\]
done
clear
View Answer play_arrow
If the rest mass of electron or positron is 0.51 MeV, then the kinetic energy of each particle in the electron-positron pair production by a y-photon of 2.42 MeV will be-
A)
0.3 MeV
done
clear
B)
1.9 MeV
done
clear
C)
0.7 MeV
done
clear
D)
1.5 MeV
done
clear
View Answer play_arrow
Two loops P and Q are made from a uniform wire. The radii of P and Q are \[{{r}_{1}}\text{ }and\text{ }{{r}_{2}}\] respectively, and their moments of inertia are Ii and 12 respectively. If \[{{I}_{2}}=4{{I}_{1}}\], then \[{{r}_{2}}/{{r}_{1}}\] equals
A)
\[{{4}^{2/3}}\]
done
clear
B)
\[{{4}^{1/3}}\]
done
clear
C)
\[{{4}^{-2/3}}\]
done
clear
D)
\[{{4}^{-1/3}}\]
done
clear
View Answer play_arrow
A point mass m is suspended from a light thread of length l, fixed at O, is whirled in a horizontal circle at constant speed as shown. From your point of view, stationary with respect to the mass, the forces on the mass are-
A)
done
clear
B)
done
clear
C)
done
clear
D)
done
clear
View Answer play_arrow
The ratio of Earth's orbital angular momentum (about the Sun) to its mass is\[4.4\times {{10}^{15}}\,{{m}^{2}}/s\]. The area enclosed by Earth's orbit is approximately.
A)
\[6.94\times {{10}^{22}}{{m}^{2}}\]
done
clear
B)
\[6.94\times {{10}^{20}}{{m}^{2}}\]
done
clear
C)
\[6.94\times {{10}^{18}}{{m}^{2}}\]
done
clear
D)
\[6.94\times {{10}^{24}}{{m}^{2}}\]
done
clear
View Answer play_arrow
Which of the following expressions represent simple harmonic motion
[a] \[x=A\text{ }sin\left( \omega t+\delta \right)\] [b] \[x=B\text{ }cos\text{ }(\omega t+\phi )\] [c] \[x=A\text{ }tan\text{ }\left( \omega t+\phi \right)\] [d] \[x=A\text{ }sin\text{ }\omega t\text{ }cos\text{ }\omega t\]
A)
a, b, c
done
clear
B)
b, c, d
done
clear
C)
a, b, d
done
clear
D)
a, d
done
clear
View Answer play_arrow
If a simple harmonic motion is represented by\[\frac{{{d}_{2}}x}{d{{t}_{2}}}+\alpha x=0\] ; its time period is-
A)
\[2\pi \alpha \]
done
clear
B)
\[2\pi \sqrt{\alpha }\]
done
clear
C)
\[\frac{2\pi }{\alpha }\]
done
clear
D)
\[\frac{2\pi }{\sqrt{\alpha }}\]
done
clear
View Answer play_arrow
The height of a barometer filled with a liquid of density 3.4 g/cc under normal condition is approximately-
A)
8 m
done
clear
B)
5 m
done
clear
C)
3 m
done
clear
D)
1 m
done
clear
View Answer play_arrow
In the Boolean algebra \[(\overline{\overline{A}.\overline{B}}).A\] equals to:
A)
\[\overline{A+B}\]
done
clear
B)
\[A\]
done
clear
C)
\[\overline{A.B}\]
done
clear
D)
\[A+B\]
done
clear
View Answer play_arrow
A sound wave starting from source S, follows two paths SEFD and SEABFD. Given that \[AB=l,\text{ }AE=\text{ }BE=0.6\text{ }l\] and wavelength of wave is\[\lambda =11\,m\]. If maximum sound is heard at D, then minimum value of length l is-
A)
11 m
done
clear
B)
6 m
done
clear
C)
2.5 m
done
clear
D)
5 m
done
clear
View Answer play_arrow
If the frequency of a closed organ pipe is f in fundamental mode. If it is suddenly get opened then the frequency of the pipe in fundamental mode is
A)
\[f/2\]
done
clear
B)
\[2f\]
done
clear
C)
\[f+10\]
done
clear
D)
\[f-10~\]
done
clear
View Answer play_arrow
A 2kg copper block is heated to \[500{}^\circ \text{ }C\] and then it is placed on a large block of ice at\[0{}^\circ C\]. If the specific heat capacity of copper is \[400\text{ }J/kg\,C{}^\circ \]and latent heat of fusion of water is \[3.5\times {{10}^{5}}J/kg\], the amount of ice that can melt is:
A)
\[\frac{7}{8}\,kg\]
done
clear
B)
\[\frac{8}{7}\,kg\]
done
clear
C)
\[\frac{5}{7}\,kg\]
done
clear
D)
\[\frac{7}{5}\,kg\]
done
clear
View Answer play_arrow
By what percentage should the pressure of a given mass of a gas be increased so as to decreases its volume by 10% at a constant temperature?
A)
\[8.1\,%\]
done
clear
B)
\[9.1\,%\]
done
clear
C)
\[10.1\,%\]
done
clear
D)
\[11.1\,%\]
done
clear
View Answer play_arrow
What amount of heat is to be transferred to nitrogen in isobaric heating process for that gas to perform work\[\Delta W=2J\]?
A)
3 J
done
clear
B)
5 J
done
clear
C)
9 J
done
clear
D)
7 J
done
clear
View Answer play_arrow
. The power radiated by a black body is P, and it radiates maximum energy around the wavelength\[{{\lambda }_{0}}\]. If the temperature of black body is now changed so that it radiates maximum energy around a wavelength \[3\lambda /4\], the power radiated by it will
A)
\[\frac{4}{3}\]
done
clear
B)
\[\frac{16}{9}\]
done
clear
C)
\[\frac{64}{27}\]
done
clear
D)
\[\frac{256}{81}\]
done
clear
View Answer play_arrow
Two metal cubes A and B of same size are arranged as shown in the figure. The extreme ends of the combination are maintained at the indicated temperature. The arrangement is thermally insulated. The coefficients of thermal conductivity of A and B are \[300\text{ }W/m{}^\circ C\] and\[200\text{ }W/m{}^\circ C\], respectively. After steady state is reached, the temperature of the interface will be-
A)
\[45{}^\circ \,C\]
done
clear
B)
\[90{}^\circ \,C\]
done
clear
C)
\[30{}^\circ \,C\]
done
clear
D)
\[60{}^\circ \,C\]
done
clear
View Answer play_arrow
A particle is constrained to move on a straight line path. It returns to the starting point after 10 sec. The total distance covered by the particle during this time is 30 m. Which of the following statement about the motion of the particle is false-
A)
Displacement of the particle is zero
done
clear
B)
Average speed of the particle is 3 m/s
done
clear
C)
Displacement of the particle is 30 m
done
clear
D)
Both [a] and [b]
done
clear
View Answer play_arrow
A particle has an initial velocity of \[9\text{ }m/s\] due east and a constant acceleration of \[2\text{ }m/{{s}^{2}}\] due west. The distance covered by the particle in the fifth second of its motion is-
A)
0
done
clear
B)
0.5 m
done
clear
C)
2m
done
clear
D)
none of these
done
clear
View Answer play_arrow
A particle moves in the plane xy with velocity\[v={{k}_{1}}\,\,i+{{k}_{2}}\,\,x\,\,j\], where i and j are the unit vectors of the x and y axes, and \[{{k}_{1}}\,\,and\,\,{{k}_{\text{2}}}\] are constants. At the initial moment of time the particle was located at the point \[x=y=0\], then the equation of the particle?s trajectory y (x) is-
A)
\[y=\frac{{{k}_{1}}}{2{{k}_{2}}}\,{{x}^{2}}\]
done
clear
B)
\[y=\frac{{{k}_{2}}}{2{{k}_{1}}}\,{{x}^{2}}\]
done
clear
C)
\[y=\frac{2{{k}_{1}}}{{{k}_{2}}}\,{{x}^{2}}\]
done
clear
D)
\[y=\frac{2{{k}_{2}}}{{{k}_{1}}}\,{{x}^{2}}\]
done
clear
View Answer play_arrow
In the system shown in the adjoining figure, the acceleration of the 1 kg mass is-
A)
\[\frac{g}{4}\,\,downwards\]
done
clear
B)
\[\frac{g}{4}\text{ }upwards\]
done
clear
C)
\[\frac{g}{2}\,\,downwards\]
done
clear
D)
\[\frac{g}{2}\,\,upwards\]
done
clear
View Answer play_arrow
A spring has a length \[{{l}_{1}}\] when tension in it is\[{{n}_{1}}\left( in\text{ }N \right)\]. It has a length \[{{l}_{2}}\] when tension is\[{{n}_{2}}\left( in\,N \right)\]. Find its spring constant-
A)
\[\frac{({{n}_{2}}{{l}_{2}}-{{n}_{1}}{{l}_{1}})}{({{l}_{1}}-{{l}_{2}})}\]
done
clear
B)
\[\frac{({{n}_{1}}-{{n}_{2}})}{({{l}_{1}}-{{l}_{2}})}\]
done
clear
C)
\[\frac{({{n}_{2}}-{{n}_{1}})}{({{l}_{1}}-{{l}_{2}})}\]
done
clear
D)
\[\frac{({{n}_{1}}{{l}_{1}}-{{n}_{2}}{{l}_{2}})}{({{l}_{1}}-{{l}_{2}})}\]
done
clear
View Answer play_arrow
A particle of mass m is moving in X-Y plane under the action of a central force \[\overline{F}\] in such a mannar that at any instant t, the components of the veloicity of the particle are- \[{{V}_{x}}=4\text{ }cos\text{ }t,\text{ }{{v}_{y}}=4\text{ }sint\text{ }t\] Then the amount of the work done by the force in a time interval \[t=0\] to t is-
A)
zero
done
clear
B)
4F
done
clear
C)
4F/t
done
clear
D)
none of the above
done
clear
View Answer play_arrow
The distance x moved by a body of mass 0.5 kg by a force varies with time t as \[x=3{{t}^{2}}+4t+5\] where x is expressed in metre and t in second. What is the work done by the force in the first 2 seconds?
A)
25 J
done
clear
B)
50 J
done
clear
C)
75 J
done
clear
D)
100 J
done
clear
View Answer play_arrow
\[KMn{{O}_{4}}\] can be decolourised by acidified-
A)
\[FeC{{l}_{2}}\]
done
clear
B)
\[FeS{{O}_{4}}.7{{H}_{2}}O\]
done
clear
C)
\[FeS{{O}_{4}}.{{\left( N{{H}_{4}} \right)}_{2}}S{{O}_{4}}.6{{H}_{2}}O\]
done
clear
D)
All of these
done
clear
View Answer play_arrow
Which of the following process is used in the extractive metallurgy of magnesium?
A)
Fused salt electrolysis
done
clear
B)
Self-reduction
done
clear
C)
Electrolysis of aqueous solution
done
clear
D)
Thermite reduction
done
clear
View Answer play_arrow
If the bond length of CO bond in carbon mono oxide is\[1.128\overset{{}^\circ }{\mathop{A}}\,\], then what is the value of CO bond length in\[Fe{{\left( CO \right)}_{5}}\]?
A)
\[1.15\,\overset{{}^\circ }{\mathop{A}}\,\]
done
clear
B)
\[1.128\,\overset{{}^\circ }{\mathop{A}}\,\]
done
clear
C)
\[1.72\,\overset{{}^\circ }{\mathop{A}}\,\]
done
clear
D)
\[1.118\,\overset{{}^\circ }{\mathop{A}}\,\]
done
clear
View Answer play_arrow
On treatment of 100 ml of 0.1 M solution of the complex \[CoC{{l}_{3}}.6{{H}_{2}}O\] with excess of \[AgN{{O}_{3}},\,\,4.305g\] of \[AgCl\] was obtained. The complex is-
A)
\[\left[ Co{{\left( {{H}_{2}}O \right)}_{6}} \right]C{{l}_{3}}\]
done
clear
B)
\[\left[ Co\left( {{H}_{2}}O \right)5Cl \right]C{{l}_{2}}.{{H}_{2}}O\]
done
clear
C)
\[\left[ Co{{\left( {{H}_{2}}O \right)}_{3}}C{{l}_{3}} \right].3{{H}_{2}}O\]
done
clear
D)
\[\left[ Co{{\left( {{H}_{2}}O \right)}_{4}}C{{l}_{2}} \right]Cl.2{{H}_{2}}O\]
done
clear
View Answer play_arrow
The compound in which the number of \[p\pi -d\pi \] bonds are equal to those present in\[ClO_{4}^{-}\].
A)
\[Xe{{O}_{4}}\]
done
clear
B)
\[Xe{{F}_{6}}\]
done
clear
C)
\[Xe{{O}_{3}}\]
done
clear
D)
\[S{{O}_{3}}\]
done
clear
View Answer play_arrow
Consider the following statements-
[I] Atomic hydrogen obtained by passing hydrogen through an electric arc [II] Hydrogen gas will not reduce heated aluminium oxide [III] Finely divided palladium absorbs large volume of \[{{H}_{2}}\] gas.
Correct is/are -
A)
I only
done
clear
B)
I, II
done
clear
C)
I, II, III
done
clear
D)
II, III
done
clear
View Answer play_arrow
\[Xe{{F}_{6}}\] on hydrolysis do not give-
A)
\[Xe{{O}_{2}}{{F}_{2}}\]
done
clear
B)
\[XeO{{F}_{4}}\]
done
clear
C)
\[Xe{{O}_{4}}\]
done
clear
D)
\[Xe{{O}_{3}}\]
done
clear
View Answer play_arrow
Which of the following pair can be distinguished by the action of heat?
(I) \[N{{a}_{2}}C{{O}_{3}}\,\,\And \,\,CaC{{O}_{3}}\] (II) \[MgC{{l}_{2}}.6{{H}_{2}}O\,\,\text{ }\!\!\And\!\!\text{ }\,\,CaC{{l}_{2}}.6{{H}_{2}}O\] (III) \[Ca{{(N{{O}_{3}})}_{2}}\,\,\And \,\,NaN{{O}_{3}}\]
Correct is-
A)
I, II
done
clear
B)
I, II, III
done
clear
C)
I, III
done
clear
D)
I only
done
clear
View Answer play_arrow
If for an element (P) the value of successive ionisation energies \[{{I}_{1}},\,\,{{I}_{2}},\,\,{{I}_{3}},\,\,{{I}_{4}}\,\,and\,\,{{I}_{5}}\] are 800, 2427, 3658, 25024 and 32824? kJ/mole respectively, then the number of valence electron present are-
A)
5
done
clear
B)
4
done
clear
C)
3
done
clear
D)
2
done
clear
View Answer play_arrow
Which of the following pair consists of only paramagnetic species?
A)
\[[O_{2}^{+},\,\,O_{2}^{-2}]\]
done
clear
B)
\[[O_{2}^{{}},\,\,NO]\]
done
clear
C)
\[[NO,\,\,N{{O}^{+}}]\]
done
clear
D)
\[[CO,\,\,NO]\]
done
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View Answer play_arrow
The bond order in NO is 2.5 while that in \[N{{O}^{+}}\] is ?3?. Which of the following statement is true for these two species?
A)
bond length in \[N{{O}^{+}}\] is greater than in NO
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B)
bond length in NO is greater than in \[N{{O}^{+}}\]
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C)
bond length in \[N{{O}^{+}}\] is equal than in NO
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D)
bond length is unpredictable
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View Answer play_arrow
Hydrolysis of \[P{{I}_{3}}\] yield-
A)
Monobasic acid and a dibasic acid
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B)
Monobasic acid and a salt
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C)
A monobasic acid and tribasic salt
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D)
A monoacidic base and a dibasic acid
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View Answer play_arrow
Which among the following complexes is/are not expected to be coloured?
A)
\[\left[ Cr{{\left( N{{H}_{3}} \right)}_{6}} \right]C{{l}_{3}}\]
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B)
\[{{K}_{3}}\left[ V{{F}_{6}} \right]\]
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C)
\[\left[ Ti{{\left( N{{O}_{3}} \right)}_{4}} \right]~\]
done
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D)
All of these
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View Answer play_arrow
An unknown compound A dissociates at \[500{}^\circ \,C\] to give products as follows \[\underset{(g)}{\mathop{A}}\,\,\,\,\rightleftharpoons \,\,\,\underset{(g)}{\mathop{B}}\,\,\,\,\,+\,\,\,\,\,\underset{(g)}{\mathop{C}}\,\,\,\,\,\,\,+\,\,\,\,\underset{(g)}{\mathop{D}}\,\] vapour density of the equilibrium mixture is 50 it dissociate to the extent of \[10\,%\]. What will be the molecular weight of compound A
A)
60
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B)
120
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C)
130
done
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D)
140
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View Answer play_arrow
The number of optically active isomers possible for
is-
A)
2
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B)
3
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C)
6
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D)
8
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View Answer play_arrow
Potential energy of the tertiary carbocation is represented by the point
A)
A
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B)
B
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C)
C
done
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D)
Any of A, B, C
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View Answer play_arrow
In the following reaction is-
A)
done
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B)
done
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C)
both of these
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D)
none of these
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View Answer play_arrow
Which type of polymer is the Buna-S rubber?
A)
Copolymer
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B)
Homo polymer
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C)
Condensation polymer
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D)
It is not a polymer
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View Answer play_arrow
Which of the following statements pertaining to an \[{{S}_{N}}2\] reaction are true?
[I] The rate of reaction is independent of the concentration of the nucleophile [II] The nucleophile attacks carbon on the side of the molecule opposite the group being displaced [III] The reaction proceeds with simultaneous bond formation and bond rupture [IV] Partial racemization of an optically active substrate results
A)
I, IV
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B)
I, III, IV
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C)
II, III
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D)
All of these
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View Answer play_arrow
An alkyne combines with a conjugated diene to give an unconjugated cycloalkadiene. The most likely title of this reaction is-
A)
Schotten-Baumann reaction
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B)
Hofmann-bromamie reaction
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C)
Pinacol-Pinacolone rearrangement
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D)
Diels-Alder reaction
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View Answer play_arrow
Sucrose is not a reducing sugar because its-
A)
hemiacetal groups cannot be converted to aldehyde groups
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B)
disaccharide bond is an a-1,4 linkage
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C)
disaccharide bond is a \[\beta -1,\,\,4\] linkage
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D)
disaccharide bond is a 1, 2 anomeric link
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View Answer play_arrow
Which is correct about above reaction-
A)
I is \[S{{N}^{1}}\] and II is \[{{E}^{2}}\]
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B)
I is \[S{{N}^{2}}\] and II is \[{{E}^{2}}\]
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C)
I is \[S{{N}^{1}}\] and II is \[{{E}^{1}}\]
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D)
I is \[S{{N}^{2}}\] and II is \[{{E}^{1}}\]
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View Answer play_arrow
The products obtained when benzyl phenyl ether is reacted with HI in the mole ratio \[1\,\,:\,\,1\] are-
[a] phenol [b] benzyl alcohol [c] benzyl iodide [d] iodobenzene
A)
a and c only
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B)
c and d only
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C)
a and d only
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D)
b and d only
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View Answer play_arrow
For the following compound, which nitrogen is having least tendency to be protonated?
A)
Nitrogen indicated by arrow 'b'
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B)
Nitrogen indicated by arrow 'a'
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C)
Nitrogen indicated by arrow 'c'
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D)
Nitrogen indicated by arrow 'd'
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A)
done
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B)
done
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C)
done
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D)
done
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A)
done
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B)
done
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C)
done
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D)
done
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Identify the 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
Ethanol cannot be concentrated by fractional distillation because-
A)
It is an inflammable liquid
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B)
Its boiling point is very close to that of water
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C)
It forms a constant boiling mixture with water
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D)
It is soluble in water in all proportions
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View Answer play_arrow
A compound possesses \[8\,%\] sulphur by mass. The least molecular mass is-
A)
200
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B)
400
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C)
155
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D)
355
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View Answer play_arrow
\[d{{z}^{2}}\] orbital has:
A)
a lobe along z-axis and a ring along xy-plane
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B)
a lobe along z-axis and a lobe along xy-plane
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C)
a lobe along z-axis and a ring along yz-plane
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D)
a lobe and a ring along z-axis
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View Answer play_arrow
If kinetic energy of a proton is increased nine times the wavelength of the de-Broglie wave associated with it would become
A)
3 times
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B)
9 times
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C)
\[\frac{1}{2}\,\,times\]
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D)
\[\frac{1}{9}\,\,times\].
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View Answer play_arrow
Oxidation number of P in \[M{{g}_{2}}{{P}_{2}}{{O}_{7}}\] is-
A)
+3
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B)
+2
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C)
+5
done
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D)
-3
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View Answer play_arrow
Which of the following plots is correct about endothermic 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
A certain monobasic acid (weak) serves as indicator. Assuming that colour change is seen when \[\frac{1}{3}\,rd\] of the indicator has been converted 3 to ions and that at end point the pH of solution is 6. What is the value of \[p{{K}_{In}}\]-
A)
5.533
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B)
0.301
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C)
6.477
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D)
6.301
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View Answer play_arrow
pH of the following solution is not affected by dilution-
[a] \[0.01\,\,M\,\,C{{H}_{3}}COONa\] [b] \[0.01\,\,M\,\,NaHC{{O}_{3}}\] [c] Buffer of 0.01 \[M\,\,C{{H}_{3}}COONa\] and 0.01 \[M\,\,C{{H}_{3}}COOH\] [d] \[0.01\,\,M\,\,C{{H}_{3}}COON{{H}_{4}}\]
A)
a, b, d
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B)
b, c, d
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C)
a, d
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D)
a, c, d
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View Answer play_arrow
Alcohol soluble in water due to presence of
A)
Ionic bond
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B)
Covalent bond
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C)
Hydrogen bond
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D)
Coordinate bond
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View Answer play_arrow
The solubility of \[Fe{{\left( OH \right)}_{3}}\] is\[x\text{ }mol\text{ }{{L}^{-}}^{1}\]. Its \[{{K}_{sp}}\] would be-
A)
\[9{{x}^{3}}\]
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B)
\[3{{x}^{4}}\]
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C)
\[27{{x}^{4}}\]
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D)
\[9{{x}^{4}}\]
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View Answer play_arrow
Which molecules does not exist-
(i) \[N{{F}_{5}}\] (ii) \[PC{{l}_{5}}\] (iii) \[O{{F}_{6}}\] (iv) \[Cl{{F}_{5}}\]
A)
only (i) and (iv)
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B)
only (i) and (ii)
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C)
only (i) and (iii)
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D)
only (ii) and (iv)
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View Answer play_arrow
10 moles of an ideal gas confined to a volume of 10 L is released into atmosphere at 300 K where the pressure is 1 bar. The work done by the gas is \[\left( R=0.083\text{ }L\text{ }bar\text{ }{{K}^{-}}^{1}\,mo{{l}^{-1}} \right)\]
A)
-249 L bar
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B)
-259 L bar
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C)
- 239 L bar
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D)
-220 L bar
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View Answer play_arrow
A crystal is made of particles A and B. A forms FCC packing and B occupies all the octahedral voids. If all the particles along the plane as shown in figure are removed, then, the formula of the crystal would be:
A)
\[AB\]
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B)
\[{{A}_{5}}{{B}_{7}}\]
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C)
\[{{A}_{7}}{{B}_{5~}}\]
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D)
\[{{A}_{2}}{{B}_{3}}\]
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View Answer play_arrow
Two liquids A and B have \[{{P}_{A}}{}^\circ :{{P}_{B}}{}^\circ =1\,\,:\,\,3\] at a certain temperature. If the mole fraction ratio of \[{{x}_{A}}:{{x}_{B}}=\,\,1\,\,:\,\,3\], the mole fraction of A in vapour in equilibrium with the solution at a given temperature is-
A)
0.1
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B)
0.2
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C)
0.5
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D)
1.0
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View Answer play_arrow
Graph between \[\log \frac{x}{m}\] and log P is a straight line at angle \[45{}^\circ \] with intercept as shown.
Hence, \[\frac{x}{m}\] at a pressure of 2 atm is:
A)
4
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B)
2
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C)
1
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D)
8
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View Answer play_arrow
Consider following sets:
Blue colour solution changes to colourless (or fades) in:
A)
I, II, III
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B)
I, II
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C)
II, III
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D)
I, III
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View Answer play_arrow
The reaction \[2NO\,\,+\,\,B{{r}_{2}}\,\,\to \,\,2NOBr\] follows the mechanism given below
I. \[NO+B{{r}_{2}}\rightleftharpoons NOB{{r}_{2}}\] .......Fast II. \[NOB{{r}_{2}}\,\,+\,\,NO\,\,\to \,\,2NOBr\] ......Slow
If concentration of both NO and \[B{{r}_{2}}\] are increased two times, the rate of reaction would become
A)
4 times
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B)
2 times
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C)
8 times
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D)
6 times
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View Answer play_arrow
Plotting a graph of \[\log \,\,{{t}_{1/2}}\] against log \[\log \,\,{{[A]}_{0}}\] of a reactant for a first order reaction, the slope will be-
A)
-1
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B)
-2
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C)
0
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D)
+1
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View Answer play_arrow
Which one of the following organisms reproduces sexually only once in its life time?
A)
Banana plant
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B)
Mango
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C)
Tomato
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D)
Eucalyptus
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View Answer play_arrow
Exponential growth occurs when there is-
A)
A great environmental resistance.
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B)
No Environmental resistance
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C)
A fixed carrying capacity
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D)
No biotic potential
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View Answer play_arrow
High degree biodiversity is found in:
A)
Deserts
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B)
Alpine biomes
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C)
Temperate biomes
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D)
Tropical biomes
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View Answer play_arrow
In the boxes A, B, C, D, E are-
A)
\[NAD{{H}_{2}}\] ATP Citric acid \[\alpha \]-keto- gluta- rate Malate
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B)
OAA \[FAD{{H}_{2}}\] \[\alpha \]-keto- gluta- rate Malic acid ATP
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C)
\[\alpha \]-keto- gluta- rate \[NAD{{H}_{2}}\] \[FAD{{H}_{2}}\] Malic Acid OAA
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D)
\[\alpha \]-keto- gluta- rate \[FAD{{H}_{2}}\] \[NAD{{H}_{2}}\] Succinic acid OAA
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View Answer play_arrow
Select the number of incorrect statements for the process of fermentation-
A. It involves only partial breakdown of glucose \[NAD{{H}_{2}}\] is oxidized to NAD by reduction of organic compound
C. No ATP are produced during fermentation as it is extracellular process in some microbes.
D. There is no ETS and Kreb's cycle
E. NADHs oxidized into NAD vigrously
F. Less than \[7\,%\] of energy of glucose is released
G. Products are useful for fermenting cells
H. Maximum concentration of Alcohol in alcoholic brevarage is \[100\,%\]
A)
2
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B)
3
done
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C)
4
done
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D)
5
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View Answer play_arrow
In frog, kidneys are lodged in
A)
Cisterna magna
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B)
mediastinal space
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C)
subvertebral space i front of heart
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D)
subcutaneous lymph space above the vertebral column
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View Answer play_arrow
Generally for conservation of germplasm by tissue culture, which plant part is used
A)
Root tip meristem
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B)
Apical and axillary meristem
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C)
Axillary root meristem
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D)
Shoot
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View Answer play_arrow
In moong bean, resistance to yellow mosaic virus were induced by
A)
Polyploidy
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B)
Mutation breeding
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C)
Hydridization
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D)
Genetic Engineering
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View Answer play_arrow
When a plant cell is placed in a solution which is hypertonic to the cell sap, which of the following conditions will not apply
A)
The water potential of the cell sap will fall
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B)
The suction pressure of the cell sap will rise
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C)
The cell will become turgid
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D)
The turgor pressure of the cell will fall
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View Answer play_arrow
Water passes quickly through cell membranes because
A)
the bilayer is hydrophilic
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B)
it moves through hydrophobic channels
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C)
water movement is tied to ATP hydrolysis
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D)
it moves through aquaporins in the membrane
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View Answer play_arrow
The smallest known plant having the same pigments as grasses and trees, belongs to
A)
Chlorophyceae
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B)
Schizomycetes
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C)
Bryophyta
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D)
Angiosperms
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View Answer play_arrow
The evolution of the animal immune system was probably driven by
A)
herbivores pushing the animals toward extinction
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B)
the selective pressures of parasities and disease organisms.
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C)
competition between the animals for their habitats
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D)
Competition between the animals and their predators.
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View Answer play_arrow
Which of the following statements about food chains and energy flow through ecosystems is false?
A)
A single organism can feed at several tropic levels
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B)
The lower the trophic level at which an organism feeds the more energy is available
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C)
Detritous food chain may have 5-6 trophic levels.
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D)
Food webs include two or more food chains
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View Answer play_arrow
Lenticels and hydathodes are small pores with following common attributes-
A)
Their opening and closing is not regulated
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B)
They allow exchange of gases
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C)
They always remain closed
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D)
They are found on the same organ of plants
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View Answer play_arrow
Select true statement regarding given cells:
A)
Water potential of cell B is greater than cell A
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B)
DPD of cell A is greater than cell B
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C)
Movement of water occurs from cell B to cell A
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D)
Movement of water occurs from cell A to cell B
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View Answer play_arrow
Tapetum occurs in-
A)
anther wall
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B)
ovary wall
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C)
male gametophyte
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D)
female gametophyte
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View Answer play_arrow
Plant stored food mainly in form of starch as starch is?
A)
is a polymer
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B)
Easily digestable
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C)
Chemically inert
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D)
Osmotically inactive
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View Answer play_arrow
The most commonly used enzyme for polymerase chain reaction is
A)
DNA polymerase-II
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B)
Reverse transcriptase
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C)
DNA polymerase-I
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D)
Taq polymerase
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View Answer play_arrow
Match list-I with list-II and select the correct answer using the codes given below the lists:
List-I List-II [A] DNA structure [1] Muller and stadder [B] Semiconservative replication of DNA [2] Beadle and Tatum [C] One gene-one enzyme theory [3] Watson and Crick [D] Induction of [4] Meselson and stahl mutation
A)
A-1 B-2 C-3 D-4
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B)
A-3 B-4 C-1 D-2
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C)
A-3 B-4 C-2 D-1
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D)
A-1 B-3 C-2 D-4
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View Answer play_arrow
GFH
List-I List-II [I] Southern blotting [A] Running of DNA fragments on gel [II] Gel electrophoresis [B] Cutting of DNA into fragment [III] Cleavage [C] Transfer of DNA fragments from gel to nitrocellulose sheet [IV] DNA probing [D] Searching for desired DNA fragments
A)
I-D, II-A, III-B, IV-C
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B)
I-C, II-A, III-B, IV-D
done
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C)
I-D, II-A, III-C, IV-B
done
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D)
I-A, II-D, III-B, IV-C
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View Answer play_arrow
Match list-I and list-II and select the correct answer using the code-
S.No. List-I List-II 1. Ligase Joins short segments of DNA together 2. DNA polymerase Cuts DNA at specific DNA sequence 3. Helicase Breaks the hydrogen bonds between complementary pairs during DNA replication
A)
1, 2 and 3 are correct
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B)
1 and 2 are correct
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C)
1 is correct
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D)
1 and 3 are correct
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View Answer play_arrow
In operon model, RNA polymerase binds to-
A)
Regulator
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B)
Structural gene
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C)
Promoter gene
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D)
Operator gene
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View Answer play_arrow
The number of genes present in human genome is approximately-
A)
100, 000 genes
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B)
20,000 to 30,000 genes
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C)
50,000 genes
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D)
10,000 to 13,000 genes
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View Answer play_arrow
The role of phycobilins in photosynthesis is to
A)
Absorb and transfer energy to chlorophyll
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B)
Donate electrons to the electron transport system
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C)
Fix carbon dioxide
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D)
Carry hydrogen or electrons
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Match the columns and select the correct option:
Column-I (Protein) Column-II (Function) [A] Insulin [P] Transport of carbohydrate in cell [B] Antibody [Q] Intercellular ground matrix [C] GLUT-4 [R] Regulate blood glucose level [D] Collagen [S] Defence against pathogen
A)
A-R, B-Q, C-P, D-S
done
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B)
A-P, B-Q, C-R, D-S
done
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C)
A-R, B-S, C-P, D-Q
done
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D)
A-P, B-S, C-R, D-Q
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View Answer play_arrow
Match the following & select the correct option:
Column-A Column-B [A] Toxin [P] Vincrestein [B] Alkaloid [Q] Concanavalin A [C] Drugs [R] Anthocynine [D] Pigment [S] Ricin [E] Lectin [T] Morphin
A)
A-S B-Q C-P D-R E-T
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B)
A-S B-T C-P D-R E-Q
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C)
A-T B-S C-P D-R E-Q
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D)
A-S B-T C-Q D-P E-R
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View Answer play_arrow
Even though a donor X and a recipient Y belongs to the same blood group, tranfusion of blood leads to agglutinisation. This is because-
A)
X is \[R{{h}^{+}}\] and Y is \[R{{h}^{-}}\]
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B)
Haemoglobin of X and Y is different
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C)
X is \[R{{h}^{-}}\] and Y is \[R{{h}^{+}}\]
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D)
Both are \[R{{h}^{+}}\]
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View Answer play_arrow
First discovered human metabolic genetic disorder was?
A)
PKU (phenylketoneuria)
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B)
AKU (alkaptoneuria)
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C)
Down syndrome
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D)
TB
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View Answer play_arrow
Turnover number of an enzyme depends on-
A)
Active sites
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B)
size of enzyme
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C)
molecular weight of enzyme
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D)
Concentration of substrate
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View Answer play_arrow
What is the role of complement in the body's defense?
A)
It interferes with viral replication
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B)
It is involved with antibody production
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C)
It aids antigen presentation
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D)
It causes pathogen lysis
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The type of immunoglobulin, whose function is possible antigen recognition by B-cells, may be-
A)
IgE
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B)
IgA
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C)
IgD
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D)
IgG
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View Answer play_arrow
Natural killer (NK) cells can destroy-
A)
Invading micro-organisms
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B)
Virus infected cells
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C)
Some tumor cells
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D)
All of these
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View Answer play_arrow
In the fluid mosaic model of the cell membrane
A)
Lipids are arranged in a single layer
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B)
Proteins are sandwiched between two layers of lipid
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C)
Proteins are represented as islands or icebergs in a lipid sea
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D)
Proteins are arranged in a continuous sheet on the membrane surface
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View Answer play_arrow
Which of the following statements about the endoplasmic reticulum is correct?
A)
It is involved in glycogenesis
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B)
It consists of a collection of unconnected vesicle
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C)
It is continuous with the outer mitochondrial membrane
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D)
It contains enzymes for the breakdown of cellular organelles
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View Answer play_arrow
A cell in prophase of mitosis can be distinguished from a cell in prophase - I of meiosis by-
A)
The presence of only half as many chromosomes in the meiotic cell
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B)
The formation of tetrads in the meiotic cell
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C)
The presence of twice as many chromosomes in the meiotic cell
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D)
None of the above
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View Answer play_arrow
The two chromatids of a metaphase chromosome represent-
A)
Homologous chromosome of a diploid set
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B)
Replicated chromosome to be separated at anaphase
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C)
Nonhomologous chromosomes joined at the centromere
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D)
Maternal and paternal chromosomes joined at the centromere
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View Answer play_arrow
Bryophyllum is an example of vegetative propagation by-
A)
Leaves
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B)
Rower buds
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C)
Roots
done
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D)
Stem cuttings
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View Answer play_arrow
Fasciculated roots for food storage and vegetative propagation are found in-
A)
Ipomoea batata
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B)
Raphanus sativus
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C)
Grasses
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D)
Dahlia
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Kanha national park is famous for-
A)
Birds
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B)
Rhinoceros
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C)
Crocodiles
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D)
Tigers
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Consider the following statements-
A. In racemose inflorescence, flowers are basipetally arranged B. Epigynous flowers are seen in rose plant C. In brinjal, the ovary is superior of these statements-
A)
A and B are true but C is false
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B)
A and C are true but B is false
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C)
A and B are false but C is true
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D)
B and C are true but A is false
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The bacteria which attack dead animals are-
A)
First link of the food chain and are known as primary producers
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B)
Second link of the food chain and are herbivorous
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C)
Third link of the food chain and are tertiary consumers
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D)
The end of food chain and are decomposers
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The living organisms can be unexceptionally distinguished from the nonliving things on the basis of their ability for-
A)
Reproduction
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B)
Growth and movement
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C)
Responsiveness to touch
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D)
Interaction with the environment and progressive evolution
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Match the kingdoms listed under Column-I with the characteristics given under Column-II. Choose the answer which gives the correct combination of the alphabets of the two columns
Column-I (Kingdom) Column-II (Characteristics) [A] Animalia [P] Prokaryotes [B] Plantae [Q] Multicellular ingestive heterotrophs [C] Protista [R] Multicellular and photosynthetic [D] Monera [S] Usually unicellular eukaryotes
A)
A=S, B=Q, C=R, D=P
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B)
A=Q, B=R, C=S, D=P
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C)
A=S, B=R, C=Q, D=P
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D)
A=R, B=Q, C=S, D=P
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The biological definition of a species depends on-
A)
Reproductive isolation of two groups of organisms
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B)
Difference in the adaptation of two groups of organisms
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C)
The geographical distribution of two groups of organisms
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D)
Anatomical and developmental differences between the two groups of organisms
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According to Bateson and Punnett, the correct sequence is-
A)
Coupling -\[AABB\text{ }\times \text{ }aabb\] Repulsion-\[AAbb\text{ }\times \text{ }aaBB\]
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B)
Coupling -\[AABB\text{ }\times \text{ }aabb\] Repulsion-\[AABB\text{ }\times \text{ }aabb\]
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C)
Coupling -\[AABB\text{ }\times \text{ }aabb\] Repulsion-\[AAbb\text{ }\times \text{ }aabb\]
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D)
Coupling -\[AAbb\text{ }\times \text{ }aaBB\] Repulsion-\[AAbb\text{ }\times \text{ }aabb\]
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Which of the following statement is correct?
A)
All bacteria are heterotrophic
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B)
Bacteria are either heterotrophic or chemoautotrophic
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C)
Bacteria are either heterotrophic or photoautotrophic
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D)
Bacteria are only occasional autotrophic
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Which of the following are the characters of dinoflagellates?
A. Planktonic golden-yellow algae with soap box-like structure B. Marine biflagellated protista C. Appear yellow, green, brown in colour. D. Biflagellated organisms with pellicle E. Saprophytic (or) parasitic unicellular forms
A)
B and C only
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B)
B and E only
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C)
C, D and E only
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D)
A, B and C only
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Which one single organism or the pair of organisms is correctly assigned to its or their named taxonomic group?
A)
Nostoc and Anabaena are examples of Protista
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B)
Paramecium and Plasmodium belong to the same kingdom as that of Penicillium
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C)
Lichen is a composite organism formed from symbiotic association of algae and protozoan
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D)
Yeast used in making bread and beer is a fungus
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Mycorrhiza promotes plant growth by-
A)
Absorbing inorganic phosphate ions from soil
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B)
Helping the plant in utilizing atmosphere nitrogen
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C)
Protecting the plant from infection
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D)
Serving as plant growth regulator
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The plant part which consists of two generations one within the other is-
A)
Germinated pollens
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B)
Embryo
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C)
Unfertilized ovule
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D)
Seeds
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A bacterial cell was transformed with a recombinant DNA that was generated using a human gene. However, the transformed cells did not produce the desired protein. Reasons could be-
A)
Human gene may have intron which bacteria cannot process
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B)
Amino acid codons for humans and bacteria are different
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C)
Human protein is formed but degraded by bacteria
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D)
All of the above
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Which has vascular tissue, produces spores but not seeds?
A)
Bryophytes
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B)
Pteridophytes
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C)
Gymnosperms
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D)
Angiosperms
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Match the column A with column B and select the correct option given below
Column-A Column-B [A] Glycogen synthesis [1] SER [B] Acrosome formation [2] Lysosome [C] Protein degradation [3] Golgi body [D] Protein synthesis [4] Ribosome
A)
A-P B-Q C-R D-S
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B)
A-R B-Q C-P D-S
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C)
A-P B-R C-Q D-S
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D)
A-P B-R C-S D-Q
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\[2N=42\] chromosome are present in root tip cell of wheat. Match the number of chromosome and plant organ given in column-I and column-II respectively and select the correct option given below-
Column-I Column-II [A] 21 [P] Embryo [B] 63 [Q] Endosperm [C] 42 [R] Megaspore [S] Megospore mother cell
A)
A=R; B=Q; C=P, S
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B)
A=R; B=P; C=Q
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C)
A=R, S; B=P; C=Q
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D)
A=S; B=Q; C=R
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Extraembryonic membrane amnion is not found in amphibians because-
A)
Amphibious habit
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B)
They lay eggs in water
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C)
Egg hatches to tadpole
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D)
They have smooth skin
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Which of the following is present in dicot leaf-
A. Water containing cavity B. Parenchymatous bundle sheath C. Reticulate venation D. Palisade tissue
A)
A, B, C
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B)
B, C & D
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C)
Only B
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D)
A, B, D
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Few diagram are given below identity the figure which belongs to monocot plant only-
A)
B & D only
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B)
B, C, D
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C)
A, C & D
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D)
Only A
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Consider the diagrams given below- How many kingdoms are related with the organisms (a to d) w.r.t. classification system given by Whittaker?
A)
Four
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B)
Three
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C)
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D)
Two One
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Presence of sexual reproduction, multicellular organism, nuclear membrane present, septum present, heterotrophs, filamentous. These character are observed in-
A)
Ascomycetes only
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B)
Basidiomycetes only
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C)
Ascomycetes and basidiomycetes
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D)
Ascomycetes, basidiomycetes and deuteromycetes
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Which of the following is Dioecious
A. Pinus B. Pisum C. Papaya D. Marchantia
A)
Only C
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B)
A, C & D
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C)
C & D
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D)
Only D
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Leaf can be differentiated from leaflet on the basis of-
A)
Axillary bud
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B)
Nodes
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C)
Venation
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D)
All of the above
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Which of the following is not a matching pair?
A)
Biting and chewing type = Grasshopper, cockroach
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B)
Piercing and Sucking type = female mosquito
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C)
Chewing and lapping type = Bed bugs
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D)
Sponging type = House fly
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Which of the following match is incorrect?
A)
Struthio - Africa
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B)
Cassowary and Emu - Australi
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C)
Preen glands - Oil secreting gland
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D)
Penguin - Neognathae
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In frog, jelly around the eggs is deposited-
A)
in water after fertilization
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B)
in water during fertilization
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C)
in the oviduct
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D)
in the ovary
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Outermost layer of our skin has dead, cornified cells. Had these cells been living, the possible disadvantage would be-
A)
Skin would be hairless
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B)
Bacteria and other microbes could freely enter into the inner tissues
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C)
Microbes could grow and multiply upon skin surface
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D)
Sweat could not be poured out
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Class Crustacea have which of the following feature-
A)
Cephalothorax, biramous appendages and gills
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B)
Cephalothorax, book lungs and chitinous exoskeleton
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C)
Head and thorax, book lungs and chitinous exoskeleton
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D)
Head and thorax, biramous appendages and book lungs
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Which of the above is Zwitter ionic form?
A)
A
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B)
C
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C)
B
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D)
All
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Echinoderms are headless, brainless and heartless. Yet they are placed at the top of invertebrates because of presence of-
A)
Enterocoel
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B)
Exclusive marine forms
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C)
High power of regeneration
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D)
Great power of reproduction
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The amount of air which remains in the lungs after normal expiration is called as
A)
Vital capacity
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B)
Functional residual capacity
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C)
Expiratory capacity
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D)
Inspiratory capacity
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\[{{C}_{4}}\] 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
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B)
A, B, C
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C)
A, D
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D)
B, D
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Which of the following statement is incorrect?
A)
S-T segment is elevated in acute myocardial infarction
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B)
Correct place for connection of artificial pace maker is right atrium in case of bradycardia
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C)
Conduction speed in Purkinje system is less than atrial pathway
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D)
Myocardial infarction is the death of a part of heart muscle following cessation of blood supply to it
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Which of the following statement is wrong-
A)
The cardiac output of a person varies according to his physiological demand
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B)
Stroke volume of heart is almost equal to the amount of blood transferred from left auricle to left ventricle
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C)
Stroke volume is the amount of blood pumped by the left ventricle in the systemic aorta in one beat
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D)
End systolic volume of auricles is about 50 ml
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The mammalian and avian skeletal muscles contain two kinds of striated muscle fibres, red and white. Which of the following difference between the two fibres is incorrect?
Red Muscle Fibre White muscle fibre
A)
They are thin, dark red due to myoglobin. They are thick, white, have less myoglobin.
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B)
Rich in mitochondria. Poor in mitochondria.
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C)
High amount of sarcoplasmic reticulum Low amount of sarcoplasmic reticulum
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D)
Aerobic contraction without accumulating lactic acid Anaerobic contraction with accumulation of lactic acid
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The term tetanus refers to-
A)
The state of muscle fatigue caused by depletion of ATP and accumulation of lactic acid.
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B)
A stronger contraction resulting from multiple motor unit Summation.
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C)
The result of wave Summation, which produces a smooth and Sustained contraction of a muscle.
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D)
The partial sustained contraction of major supporting muscles.
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Which of the following is incorrect?
A)
In collecting tubule the filtrate can be first termed as urine
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B)
During micturition contraction occurs in detrusor muscle & internal sphincter is relaxed
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C)
ANF opposes the regulation of RAAS and promotes the reabsorption of \[N{{a}^{+}}\] by the collecting duct
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D)
Alkaptonuria is a genetic disease in which homogentisic acid is excreted out with urine
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Which of the following match is wrong?
A)
High threshold - \[N{{a}^{+}}\], glucose, Amino Acid substance
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B)
Uraemia - Increased concentration of urea in blood
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C)
Cortical Nephrons - Constitute about \[85\,%\] of the total nephron having long loop of Henie
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D)
Uric acid - Derived from nucleic acid metabolism
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The base height of the dingdong plant is 10 cm. three pair genes contribute to the height of the plant and each dominant allele contributed 4 cm. to height. If your cross a 10 cm. Plant \[({{a}_{1}}\text{ }{{a}_{1}}\text{ }{{a}_{2}}\text{ }{{a}_{2}}\,{{a}_{3}}\text{ }{{a}_{3}}\text{ }recessive)\] with a 34 cm. plant, how many phenotypic classes will there be in the\[{{F}_{2}}\]?
A)
7
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B)
8
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C)
5
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D)
9
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Which of the following is not associated with parathyroid hormone (PTH)?
A)
It promotes release of \[C{{a}^{2+}}\] from bone matrix into the blood
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B)
It stimulates kidney to release calcitriol
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C)
More PTH is released when blood calcium level rises
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D)
Hypoparathyroidism results in parathyroid tetany
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The extra-embryonic membrances of the mammalian embryo are derived from-
A)
Formative cells
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B)
Follicle cells
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C)
Inner cell mass
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D)
Trophoblast
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After examining the evidence related to the evolution of haemoglobin, you might conclude that
A)
Bird?s haemoglobin evolved prior to lamprey haemoglobin
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B)
Frogs are more closely related to lampreys than to birds
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C)
Evolutionary changes occur at molecular level
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D)
Only DNA can be examined for establishing evolutionary differences
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The ear detects sound by the movement of
A)
The basilar membrane
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B)
The tectorial membrane
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C)
The cupula that surrounds the hair cells
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D)
The fluid in the semi-circular canals
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The pyramid of energy is the best representation of an ecosystem because it indicates-
A)
Relation of all plants and animals
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B)
Total energy present in an ecosystem
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C)
The rate of food flow through the food chain
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D)
None of these
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Rearrange the following groups of plants in an ascending evolutionary scale. Progymnosperms; Psilophyton; Seed ferns; Cycads; Gnetales
A)
Progymnosperms, Seed ferns, Psilophyton, Gnetales, Cycads
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B)
Psilophyton, Progymnosperms, Seed ferns, Cycads, Gnetales
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C)
Psilophyton, Seed ferns, Progymnosperms, Gnetales, Cycads
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D)
Psilophyton, Progymnosperms, Cycads, Seed ferns Gnetales
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The anaerobic environment required for the biological \[{{N}_{2}}\] fixation in root nodules of leguminous plants is maintained by:
A)
Nodulin
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B)
Lectin
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C)
Leghaemoglobin
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D)
Nitrogenase
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Following is a list of the events (in a random order) that lead to the formation of an auditory impulse.
a. Vibration is transferred from the malleus to the incus to the stapes. b. Basilar membrane moves up and down. c. Never impulse is transmitted in cochlear nerve to auditory cortex of brain for impulse analysis and recognitions. d. Sound waves pass through ear canal. e. Stereocilia of hair cells of organ of Corti rub against tectorial membrane. f. Sound waves cause ear drum to vibrate. g. Nerve impulse is generated. h. Vibration move from fluid of vestibular canal to the fluid of tympanic canal. i. Membrane at oval window vibrates.
Which of the following options represents these events in a correct order?
A)
[d], [t], [a], [i], [h], [b], [e]. [g], [c]
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B)
[a], [b], [c]. [d], [e], [f], [h], [h], [i]
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C)
(i), [h], [g], [f], [e], [d], [c], [b], [a]
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D)
[d], [f], [a], [h], (i), [b], [e], [g], [c]
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Different region of brain controls different function which of the following is incorrectly matched?
A)
Cerebrum - Thinking, intelligence, memory, will power
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B)
Diencephalon - Heat, cold, pain, hunger, thirst
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C)
Hypothalamus - Appetite, satiety, emotion, anger, pleasure
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D)
Medulla oblongata - Involuntary muscular, co-ordination, maintains posture, equilibrium of body
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XXY Drosophila is female but XXY human is an abnormal male. It suggests that-
A)
Human and Drosophila have different types of sex determinants
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B)
Y chromosomes is sex determining factor
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C)
X chromosome is the sex determining factor
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D)
XXY Drosophila can also be abnormal
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Which of the following statement about 'Saheli' the new oral contraceptive pill is incorrect?
A)
It was developed by scientists at Central Drug Research Institute (CDRI) in Lucknow
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B)
It is once a week pill with very few side effects and high contraceptive value
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C)
It is non-steroidal, pill
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D)
It inhibits the release of FSH and LH
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If the length of the double helical DNA is 1.7 meters. The numbers of base pairs present in the DNA is
A)
\[5\times {{10}^{9}}\]
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B)
\[1.7\times {{10}^{9}}\]
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C)
\[3.4\times {{10}^{9}}\]
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D)
\[1.7\times {{10}^{5}}\]
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The structure of nuclear membrane facilitates
A)
Synapsis of homologous chromosomes at meiosis
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B)
Nucleo-cytoplasmic exchange of materials
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C)
Anaphasic separation of daughter chromosomes
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D)
Organization of spindles
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