A bucket tied at the end of a 1.6m long string is whirled in a vertical circle with constant speed. What should be the minimum speed so that the water from the bucket does not spill when the bucket is at the highest position?
A)
4 m/sec
done
clear
B)
6.25 m/sec
done
clear
C)
16 m/sec
done
clear
D)
8 m/sec
done
clear
View Answer play_arrow
Steam at \[100{}^\circ C\] is passed into 1.1 kg of water contained in a calorimeter of water equivalent 0.02 kg at \[15{}^\circ C\] till the temperature of the calorimeter and its contents rises to \[80{}^\circ C.\] The mass of the steam condensed in kg is
A)
0.130
done
clear
B)
0.065
done
clear
C)
0260
done
clear
D)
0.135
done
clear
View Answer play_arrow
A thick uniform rope of length L is hanging from a rigid support. A transverse wave of wavelength \[{{\lambda }_{0}}\] is set up at the middle of rope as shown in figure. The wavelength of the wave as it reaches to the topmost point is
A)
\[2{{\lambda }_{0}}\]
done
clear
B)
\[\sqrt{2}{{\lambda }_{0}}\]
done
clear
C)
\[\frac{{{\lambda }_{0}}}{\sqrt{2}}\]
done
clear
D)
\[{{\lambda }_{0}}\]
done
clear
View Answer play_arrow
Light enters at an angle of incidence in a transparent rod of refractive index n. For what value of the refractive index of the material of the rod the light once entered into it will not leave it through its lateral face whatsoever be the value of angle of incidence?
A)
\[n>\sqrt{2}\]
done
clear
B)
\[n=1\]
done
clear
C)
\[n=1.1\]
done
clear
D)
\[n=1.3\]
done
clear
View Answer play_arrow
The net magnetic moment of two identical magnets each of magnetic moment \[{{M}_{0}},\] inclined at \[60{}^\circ \] with each other is
A)
\[{{M}_{0}}\]
done
clear
B)
\[\sqrt{2}\,{{M}_{0}}\]
done
clear
C)
\[\sqrt{3}\,{{M}_{0}}\]
done
clear
D)
\[2\,{{M}_{0}}\]
done
clear
View Answer play_arrow
The turn ratio in a step up transformer is 1: 2. If a cell of 1.5 V is connected across the input, then the voltage across the output will be
A)
0.1 V
done
clear
B)
1.5 V
done
clear
C)
0.75 V
done
clear
D)
zero
done
clear
View Answer play_arrow
The condition for an achromatic doublet, is (\[{{f}_{1}}\] and\[{{f}_{2}}\]are the focal lengths of individual lenses)
A)
\[{{f}_{1}}-{{f}_{2}}=\frac{{{\omega }_{1}}{{\omega }_{2}}}{2}{{f}_{2}}\]
done
clear
B)
\[{{\omega }_{1}}{{f}_{1}}+{{\omega }_{2}}{{f}_{2}}=0\]
done
clear
C)
\[\frac{{{\omega }_{1}}}{{{f}_{1}}}+\frac{{{\omega }_{2}}}{{{f}_{2}}}=0\]
done
clear
D)
\[\frac{{{f}_{1}}}{{{f}_{2}}}+\frac{{{\omega }_{1}}}{{{\omega }_{1}}}=0\]
done
clear
View Answer play_arrow
Consider two thin identical conducting wires covered with very thin insulating material. One of the wires is bent into a loop and produces magnetic field \[{{B}_{1}},\] at its centre when a current I passes through it. The ratio \[{{B}_{1}}:{{B}_{2}}\] is:
A)
1 : 1
done
clear
B)
1 : 3
done
clear
C)
1 : 9
done
clear
D)
9 : 1
done
clear
View Answer play_arrow
A square loop of side a is rotating about its diagonal with angular velocity co in a perpendicular magnetic field B. It has 10 turns. The emf induced is
A)
\[B\,\,{{a}^{2}}\omega \,\,\sin \,\,\omega t\]
done
clear
B)
\[B\,\,{{a}^{2}}\omega \,\,\cos \,\,\omega t\]
done
clear
C)
\[5\,\,\sqrt{2}\,\,B\,\,{{a}^{2}}\]
done
clear
D)
\[10\,B\,\,{{a}^{2}}\omega \,\,\sin \,\,\omega t\]
done
clear
View Answer play_arrow
When light of wavelength 300 nm (nanometre) falls on a photoelectric emitter, photoelectrons are emitted. For another emitter, however, light of 600 nm wavelength is sufficient for creating photoemission. What is the ratio of the work functions of the two emitters?
A)
1 : 2
done
clear
B)
2 : 1
done
clear
C)
4 : 1
done
clear
D)
1 : 4
done
clear
View Answer play_arrow
The binding energy of deuteron \[(_{1}^{2}H)\] is 1.15 MeV per nucleon and an alpha particle \[(_{2}^{4}He)\] has a binding energy of 7.1 MeV per nucleon. Then in the reaction \[_{1}^{2}H+_{1}^{2}H\xrightarrow{{}}_{2}^{4}He+Q\] the energy released Q is
A)
5.95 MeV
done
clear
B)
26.1 MeV
done
clear
C)
23.8 MeV
done
clear
D)
289.4 MeV
done
clear
View Answer play_arrow
The linear velocity of a rotating body is given by \[\overrightarrow{v}=\overrightarrow{\omega }\times \overrightarrow{r}\] If \[\overrightarrow{\omega }=\overrightarrow{i}-2\hat{j}+2\hat{k}\] and \[\overrightarrow{r}=4\hat{j}-3\hat{k},\] then the magnitude of \[\overrightarrow{v}\] is
A)
\[\sqrt{29}\]units
done
clear
B)
\[\sqrt{31}\] units
done
clear
C)
\[\sqrt{37}\]units
done
clear
D)
\[\sqrt{37}\] units
done
clear
View Answer play_arrow
The initial speed of a bullet fired from a rifle is 630 m/s. The rifle is fired at the centre of a target 700 m away at the same level as the target. How far above the centre of the target?
A)
1.0 m
done
clear
B)
4.2 m
done
clear
C)
6.1 m
done
clear
D)
9.8 m
done
clear
View Answer play_arrow
What is the work done in blowing a soap bubble of radius 0.2 m? (The surface tension of soap solution is 0.06 N/m)
A)
\[192\pi \times {{10}^{-4}}J\]
done
clear
B)
\[96\pi \times {{10}^{-4}}J\]
done
clear
C)
\[194.2\pi \times {{10}^{-4}}J\]
done
clear
D)
None of these
done
clear
View Answer play_arrow
A particle describes a horizontal circle in a conical funnel whose inner surface is smooth with speed of 0.5 m/s. What is the height of the plane of circle from vertex of the funnel?
A)
0.25 cm
done
clear
B)
2 cm
done
clear
C)
4 cm
done
clear
D)
2.5 cm
done
clear
View Answer play_arrow
The molar specific heat at constant pressure of an ideal gas is (7/2) R. The ratio of specific heat at constant pressure to that at constant volume is
A)
8/7
done
clear
B)
5/7
done
clear
C)
9/7
done
clear
D)
7/5
done
clear
View Answer play_arrow
Two parallel large thin metal sheets have equal surface charge densities \[(\sigma =26.4\times {{10}^{-12}}c/{{m}^{2}})\] of opposite signs. The electric field between these sheets is
A)
\[1.5N/C\]
done
clear
B)
\[1.5\times {{10}^{-10}}N/C\]
done
clear
C)
\[3\,N/C\]
done
clear
D)
\[3\times {{10}^{-10}}N/C\]
done
clear
View Answer play_arrow
The correct statement of the law of equipartition of energy is
A)
the total energy of a gas is equally divided among all the molecules
done
clear
B)
the gas possess equal energies in all the three directions x, y and z-axis
done
clear
C)
the total energy of a gas is equally divided between kinetic and potential energies
done
clear
D)
the total kinetic energy of a gas molecules is equally divided among translational and rotational kinetic energies
done
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View Answer play_arrow
The equivalent capacitance between a and b for the combination of capacitors shown in figure where all capacitances are in microfarad is
A)
\[6.0\mu F\]
done
clear
B)
\[4.0\mu F\]
done
clear
C)
\[2.0\mu F\]
done
clear
D)
\[3.0\mu F\]
done
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View Answer play_arrow
An electric dipole placed in a non-uniform electric field experiences
A)
both, a torque and a net force
done
clear
B)
only a force but no torque
done
clear
C)
only a torque but no net force
done
clear
D)
no torque and no net force
done
clear
View Answer play_arrow
If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by a monochromatic blue light of the same intensity
A)
fringe width will decrease
done
clear
B)
fringe width will increase
done
clear
C)
fringe width will remain unchanged
done
clear
D)
fringes will become less intense
done
clear
View Answer play_arrow
The transfer ratio \[\beta \] of a transistor is 50. The input resistance of the transistor when used in the common emitter configuration is \[1\,k\Omega \] the peak value of the collector A.C. current for an A.C. input voltage of 0.01 V, is
A)
\[500\,\mu A\]
done
clear
B)
\[0.25\,\mu A\]
done
clear
C)
\[0.01\,\mu A\]
done
clear
D)
\[100\,\mu A\]
done
clear
View Answer play_arrow
Magnetic flux \[\phi \] in weber in a closed circuit of resistance 10W varies with time t (sec) as \[\phi =6{{t}^{2}}-5t+1.\] The magnitude of induced current at t = 0.25s is
A)
0.2 A
done
clear
B)
0.6 A
done
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C)
1.2 A
done
clear
D)
0.8 A
done
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View Answer play_arrow
A body falls on the ground from a height of 10 m and rebounds to a height of 2.5 m. Then the ratio of velocities of the body just before and just after the collision will be
A)
2 : 1
done
clear
B)
1 : 2
done
clear
C)
4 : 1
done
clear
D)
1 : 3
done
clear
View Answer play_arrow
A body is initially at rest. It undergoes one- dimensional motion with constant acceleration. The power delivered to it at time t is proportional to:
A)
\[{{t}^{1/2}}\]
done
clear
B)
\[t\]
done
clear
C)
\[{{t}^{3/2}}\]
done
clear
D)
\[{{t}^{2}}\]
done
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View Answer play_arrow
A point particle is held on the axis of a ring of mass m and radius rat a distance r from its centre C. When released, it reaches C under the gravitational attraction of the ring. Its speed at C will be
A)
\[\sqrt{\frac{2Gm}{r}\left( \sqrt{2}-1 \right)}\]
done
clear
B)
\[\sqrt{\frac{Gm}{r}}\]
done
clear
C)
\[\sqrt{\frac{2Gm}{r}\left( 1-\frac{1}{\sqrt{2}} \right)}\]
done
clear
D)
\[\sqrt{\frac{2Gm}{r}}\]
done
clear
View Answer play_arrow
The pressure of an ideal gas varies with volume as \[P=\alpha V,\] where \[\alpha \] is a constant. One mole of the gas is allowed to undergo expansion such that its volume becomes 'm' times its initial volume. The work done by the gas in the process is
A)
\[\frac{\alpha V}{2}\left( {{m}^{2}}-1 \right)\]
done
clear
B)
\[\frac{{{\alpha }^{2}}\,{{V}^{2}}}{2}\left( {{m}^{2}}-1 \right)\]
done
clear
C)
\[\frac{\alpha }{2}\left( {{m}^{2}}-1 \right)\]
done
clear
D)
\[\frac{\alpha \,{{V}^{2}}}{2}\left( {{m}^{2}}-1 \right)\]
done
clear
View Answer play_arrow
A piece of copper and another of germanium are cooled from room temperature to \[80{}^\circ \,\,K.\] The resistance of
A)
each of them increases
done
clear
B)
each of them decreases
done
clear
C)
copper increases and germanium decreases
done
clear
D)
copper decreases and germanium increases
done
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View Answer play_arrow
A simple pendulum of length \[l\] has a maximum angular displacement\[\theta \]. The maximum kinetic energy of the bob is
A)
\[mgl\,(1-cos\theta )\]
done
clear
B)
\[0.5\,mgl\]
done
clear
C)
\[mgl\]
done
clear
D)
\[5\,mgl\]
done
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View Answer play_arrow
Current \[{{I}_{1}}\] in the following circuit is
A)
\[0.4\,A\]
done
clear
B)
\[-\,0.4\,A\]
done
clear
C)
\[0.8\,A\]
done
clear
D)
\[-\,0.8\,A\]
done
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View Answer play_arrow
Two bullets are fired horizontally with different velocities from the same height. Which will reach the ground first?
A)
Slower one
done
clear
B)
Faster one
done
clear
C)
Both will reach simultaneously
done
clear
D)
It cannot be predicted
done
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View Answer play_arrow
A proton and an \[\alpha \]-particle enter a uniform magnetic field perpendicularly with the same speed. If proton takes \[25\,\,\mu \] second to make 5 revolutions, then the time period for the \[\alpha \]-particle would be
A)
\[50\,\,\mu \]sec
done
clear
B)
\[25\,\,\mu \]sec
done
clear
C)
\[10\,\,\mu \]sec
done
clear
D)
\[5\,\,\mu \]sec
done
clear
View Answer play_arrow
In the figure shown, ABC is a uniform wire. If centre of mass of wire lies vertically below point A, then \[\frac{BC}{AB}\] is close to :
A)
1.85
done
clear
B)
1.5
done
clear
C)
1.37
done
clear
D)
3
done
clear
View Answer play_arrow
One of the lines in the emission spectrum of \[L{{i}^{2+}}\] has the same wavelength as that of the \[{{2}^{nd}}\] line of Balmer series in hydrogen spectrum. The electronic transition corresponding to this line is \[n=12\to n=x.\] Find the value of x.
A)
8
done
clear
B)
6
done
clear
C)
7
done
clear
D)
5
done
clear
View Answer play_arrow
A conical pendulum of length 1 m makes an angle \[\theta =45{}^\circ \] w.r.t. Z-axis and moves in a circle in the XY plane. The radius of the circle is 0.4 m and its centre is vertically below O. The speed of the pendulum, in its circular path, will be:
(Take\[g=10\,m/{{s}^{-2}}\])
A)
0.4 m/s
done
clear
B)
4 m/s
done
clear
C)
0.2 m/s
done
clear
D)
2 m/s
done
clear
View Answer play_arrow
A student when discussing the properties of a medium (except vacuum) writes: Velocity of light in vacuum = velocity of light in medium. This formula is
A)
dimensionally correct
done
clear
B)
dimensionally incorrect
done
clear
C)
numerically incorrect
done
clear
D)
Both [a] and [c]
done
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View Answer play_arrow
The Fraunhoffer ?diffraction? pattern of a single slit is formed in the focal plane of a lens of focal length 1 m. The width of slit is 0.3 mm. If third minimum is formed at a distance of 5 mm from central maximum, then wavelength of light will be
A)
\[5000\,\overset{{}^\circ }{\mathop{\,A}}\,\]
done
clear
B)
\[2500\,\,\overset{{}^\circ }{\mathop{A}}\,\]
done
clear
C)
\[7500\,\,\overset{{}^\circ }{\mathop{A}}\,\]
done
clear
D)
\[8500\,\,\overset{{}^\circ }{\mathop{A}}\,\]
done
clear
View Answer play_arrow
In thermodynamic processes, which of the following statements is not true?
A)
In an isochoric process pressure remains constant
done
clear
B)
In an isothermal process the temperature remains constant
done
clear
C)
In an adiabatic process \[P{{V}^{\gamma }}=\] constant
done
clear
D)
In an adiabatic process the system is insulated from the surroundings
done
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View Answer play_arrow
Thermal capacity of 40 g of aluminium (specific heat, \[s=0.2\,cal/g\,\,K\]) is
A)
\[168\,joule/{}^\circ C\]
done
clear
B)
\[672\,joule/{}^\circ C\]
done
clear
C)
\[840\,joule/{}^\circ C\]
done
clear
D)
\[33.6\,joule/{}^\circ C\]
done
clear
View Answer play_arrow
Equipotential surfaces associated with an electric field which is increasing in magnitude along the x-direction are
A)
planes parallel to yz-plane
done
clear
B)
planes parallel to xy-plane
done
clear
C)
planes parallel to xz ?plane
done
clear
D)
coaxial cylinders of increasing radii around the x-axis
done
clear
View Answer play_arrow
Which of the following waves has the maximum wavelength?
A)
Infrared rays
done
clear
B)
UV rays
done
clear
C)
Radio waves
done
clear
D)
X-rays
done
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View Answer play_arrow
A hemispherical glass body of radius 10 cm and refractive index 1.5 is silvered on its curved surface. A small air bubble is 6 cm below the flat surface inside it along the axis. The position of the image of the air bubble made by the mirror is seen:
A)
14 cm below flat surface
done
clear
B)
20 cm below flat surface
done
clear
C)
16 cm below flat surface
done
clear
D)
30 cm below flat surface
done
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View Answer play_arrow
A cord is wound round the circumference of the wheel of radius r. The axis of the wheel is horizontal and the moment of inertia about its centre is I. A weight mg is attached to the cord at the end. The weight falls from rest. After falling through a distance h, the angular velocity of the wheel will be
A)
\[\sqrt{2\,gh}\]
done
clear
B)
\[\sqrt{\frac{2\,mgh}{I+2mr}}\]
done
clear
C)
\[\sqrt{\frac{2\,mgh}{I+m{{r}^{2}}}}\]
done
clear
D)
\[\sqrt{\frac{2\,gh}{I+mr}}\]
done
clear
View Answer play_arrow
Two bodies moving towards each other collide and move away in opposite direction. There is some rise in temperature of bodies because a part of the kinetic energy is converted into
A)
heat energy
done
clear
B)
nuclear energy
done
clear
C)
electrical energy
done
clear
D)
mechanical energy
done
clear
View Answer play_arrow
If an AC main supply is given to be 220 V then the average emf during a positive half cycle will be
A)
\[198\,\,V\]
done
clear
B)
\[220\,\,V\]
done
clear
C)
\[240\,\,V\]
done
clear
D)
\[220\sqrt{2}\,\,V\]
done
clear
View Answer play_arrow
If the principal quantum number n = 6, the correct sequence of filling of electrons will be:
A)
\[ns\to (n-2)f\to np\to (n-1)d\]
done
clear
B)
\[ns\to (n-2)f\to (n-1)d\to np\]
done
clear
C)
\[ns\to np\to (n-1)d\to (n-2)f\]
done
clear
D)
\[ns\to (n-1)d\to (n-2)f\to np\]
done
clear
View Answer play_arrow
When NaCl is dopped with \[1.0\times {{10}^{-3}}\] mole of \[SrC{{l}_{2}},\] the number of cation vacancy is
A)
\[6.023\times {{10}^{18}}\]
done
clear
B)
\[6.023\times {{10}^{20}}\]
done
clear
C)
\[2\times 6.023\times {{10}^{20}}\]
done
clear
D)
\[3.011\times {{10}^{20}}\]
done
clear
View Answer play_arrow
A 0.5 M NaOH solution offers a resistance of 31.6 ohm in a conductivity cell at room temperature. What shall be the approximate molar conductance of this NaOH solution if cell constant of the cell is \[0.367\,\,c{{m}^{-1}}.\]
A)
\[23.4\,\,S\,\,c{{m}^{2}}\,mol{{e}^{-1}}\]
done
clear
B)
\[23.2\,\,S\,\,c{{m}^{2}}\,mol{{e}^{-1}}\]
done
clear
C)
\[46.45\,\,S\,\,c{{m}^{2}}\,mol{{e}^{-1}}\]
done
clear
D)
\[54.64\,\,S\,\,c{{m}^{2}}\,mol{{e}^{-1}}\]
done
clear
View Answer play_arrow
Which of the following arrangements does not represent the correct order of the property stated against it?
A)
\[{{V}^{2+}}<C{{r}^{2+}}<M{{n}^{2+}}<F{{e}^{2+}}:\] paramagnetic behavior
done
clear
B)
\[N{{i}^{2+}}<C{{o}^{2+}}<F{{e}^{2+}}<M{{n}^{2+}}:\] ionic size
done
clear
C)
\[C{{o}^{3+}}<F{{e}^{3+}}<C{{r}^{3+}}<S{{c}^{3+}}:\] stability in aqueous solution
done
clear
D)
\[Sc<Ti<Cr<Mn:\] number of oxidation states
done
clear
View Answer play_arrow
Predict the relative acidic strength among the following
A)
\[{{H}_{2}}S<{{H}_{2}}Se<{{H}_{2}}O<{{H}_{2}}Te\]
done
clear
B)
\[{{H}_{2}}O<{{H}_{2}}S<{{H}_{2}}Se<{{H}_{2}}Te\]
done
clear
C)
\[{{H}_{2}}Te<{{H}_{2}}Se<{{H}_{2}}S<{{H}_{2}}O\]
done
clear
D)
\[{{H}_{2}}O<{{H}_{2}}Se<{{H}_{2}}S<{{H}_{2}}Te\]
done
clear
View Answer play_arrow
In \[{{S}_{N}}2\] reactions, the correct order of reactivity for the following compounds: \[C{{H}_{3}}Cl,\]\[C{{H}_{3}}C{{H}_{2}}Cl,\]\[{{(C{{H}_{3}})}_{2}}CHCl\] and \[{{(C{{H}_{3}})}_{3}}CCl\] is:
A)
\[C{{H}_{3}}Cl>{{(C{{H}_{3}})}_{2}}CHCl>C{{H}_{3}}C{{H}_{2}}Cl>{{(C{{H}_{3}})}_{3}}CCl\]
done
clear
B)
\[C{{H}_{3}}Cl>C{{H}_{3}}C{{H}_{2}}Cl>{{(C{{H}_{3}})}_{2}}CHCl>{{(C{{H}_{3}})}_{3}}CCl\]
done
clear
C)
\[C{{H}_{3}}C{{H}_{2}}Cl>C{{H}_{3}}Cl>{{(C{{H}_{3}})}_{2}}CHCl>{{(C{{H}_{3}})}_{3}}CCl\]
done
clear
D)
\[{{(C{{H}_{3}})}_{2}}CHCl>C{{H}_{3}}C{{H}_{2}}Cl>C{{H}_{3}}Cl>{{(C{{H}_{3}})}_{3}}CCl\]
done
clear
View Answer play_arrow
Among the following the aromatic compound is
A)
done
clear
B)
done
clear
C)
done
clear
D)
done
clear
View Answer play_arrow
The four quantum numbers that could identify the third 3p electron in sulphur are
A)
\[n=3,\]\[1=0,\]\[m=+1,\]\[s=+\frac{1}{2}\]
done
clear
B)
\[n=2,\]\[1=2,\]\[m=-1,\]\[s=+\frac{1}{2}\]
done
clear
C)
\[n=3,\]\[1=2,\]\[m=+1,\]\[s=-\frac{1}{2}\]
done
clear
D)
\[n=3,\]\[1=1,\]\[m=-1,\]\[s=+\frac{1}{2}\]
done
clear
View Answer play_arrow
\[S{{n}^{4+}}+2{{e}^{-}}\xrightarrow{{}}S{{n}^{2+}}\,\,E{}^\circ =0.13\,V\] \[B{{r}_{2}}+2{{e}^{-}}\xrightarrow{{}}2B{{r}^{-}}\,\,E{}^\circ =1.08\,V\] Calculate \[{{K}_{eq}}\] for the cell at \[20{}^\circ C\] formed by two electrodes
A)
\[{{10}^{41}}\]
done
clear
B)
\[{{10}^{32}}\]
done
clear
C)
\[{{10}^{-32}}\]
done
clear
D)
\[{{10}^{-42}}\]
done
clear
View Answer play_arrow
Calculate the pH of a solution obtained by mixing 2 ml of HCl of pH 2 and 3 ml of solution of KOH of pH=12
A)
10.30
done
clear
B)
3.70
done
clear
C)
11.30
done
clear
D)
None of these
done
clear
View Answer play_arrow
Which of the following represents a correct sequence of reducing power of the following elements?
A)
\[Li>Cs>Rb\]
done
clear
B)
\[Rb>Cs>Li\]
done
clear
C)
\[Cs>Li>Rb\]
done
clear
D)
\[Li>Rb>Cs\]
done
clear
View Answer play_arrow
Paramagnetism of Cr (Z = 24), \[M{{n}^{2+}}\] (Z = 25) and \[F{{e}^{3+}}\] (Z = 26) are x, y and z respectively. They are in the order
A)
\[x=y=z\]
done
clear
B)
\[x>y>z\]
done
clear
C)
\[x=y>z\]
done
clear
D)
\[x>y=z\]
done
clear
View Answer play_arrow
Match the polymers in column - A with their main uses in column - B and choose the correct answer:
Column-A Column-B [A] Polystrene (i) Paints and lacquers [B] Glyptal (ii) Rain coats [C] Polyvinyl chloride (iii) Manufacture of toys [D] Bakelite (iv) Computer discs
A)
[A]\[\to \](ii), [B]\[\to \](i), [C]\[\to \](iii), [D]\[\to \](iv)
done
clear
B)
[A]\[\to \](ii), [B]\[\to \](iv), [C]\[\to \](iii), [D]\[\to \](i)
done
clear
C)
[A]\[\to \](iii), [B]\[\to \](iv), [C]\[\to \](ii), [D]\[\to \](i)
done
clear
D)
[A]\[\to \](iii), [B]\[\to \](i), [C]\[\to \](ii), [D]\[\to \](iv)
done
clear
View Answer play_arrow
The correct IUPAC name of the compound
A)
4-Methoxy-2-nitrobenzaldehyde
done
clear
B)
4-Formyl-3 nitroanisole
done
clear
C)
4-Methoxy-6-nitrobenzaldehyde
done
clear
D)
2-Formyl-5-methoxynitrobenzene
done
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View Answer play_arrow
The favourable condition for a process to be spontaneous is :
A)
\[T\Delta S>\Delta H,\] \[\Delta H=+\,ive,\]\[\Delta S=-\,ive\]
done
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B)
\[T\Delta S>\Delta H,\]\[\Delta H=+\,ive,\]\[\Delta S=+\,ive\]
done
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C)
\[T\Delta S>\Delta H,\] \[\Delta H=-\,ive,\]\[\Delta S=-\,ive\]
done
clear
D)
\[T\Delta S>\Delta H,\] \[\Delta H=+\,ive,\]\[\Delta S=+\,ive\]
done
clear
View Answer play_arrow
Vapour pressure (in ton-) of an ideal solution of two liquids A and B is given by: \[P=52{{X}_{A}}+114\] where \[{{X}_{A}}\] is the mole fraction of A in the mixture. The vapour pressure (in torr) of equimolar mixture of the two liquids will be:
A)
166
done
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B)
83
done
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C)
140
done
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D)
280
done
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View Answer play_arrow
What is order with respect to A, B, C, respectively
[A] [B] [C] rate(M/sec.) 0.2 0.1 0.02 \[8.08\times {{10}^{-3}}\] 0.1 0.2 0.02 \[2.01\times {{10}^{-3}}\] 0.1 1.8 0.18 \[6.03\times {{10}^{-3}}\] 0.2 0.1 0.08 \[6.464\times {{10}^{-2}}\]
A)
\[-1,\]\[1,\]\[3/2\]
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B)
\[-1,\]\[1,\]\[1/2\]
done
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C)
\[1,\]\[3/2,\]\[-1\]
done
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D)
\[1,\]\[-1,\]\[3/2\]
done
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View Answer play_arrow
Fluorine does not show highest oxidation state opposite to other halogens, because
A)
it is most electronegative.
done
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B)
it has no d-orbital.
done
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C)
its atomic radius is very small.
done
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D)
\[{{F}^{-}}\]ion is stable and isoelectronic with neon.
done
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View Answer play_arrow
The incorrect statement among the following is:
A)
\[\alpha \]-D-glucose and \[\beta \]-D-glucose are anomers.
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B)
\[\alpha \]-D-glucose and \[\beta \]-D-glucose are enantiomers.
done
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C)
Cellulose is a straight chain polysaccharide made up of only \[\beta \]-D-glucose units.
done
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D)
The penta acetate of glucose does not react with hydroxyl amine.
done
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View Answer play_arrow
The reagent needed for converting
A)
Cat. Hydrogenation
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B)
\[{{H}_{2}}/\]Lindlar Cat.
done
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C)
\[Li/N{{H}_{3}}\]
done
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D)
\[LiAl{{H}_{4}}\]
done
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View Answer play_arrow
Which of the following compound is expected to be optically active?
A)
\[{{(C{{H}_{3}})}_{2}}CHCHO\]
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B)
\[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}CHO\]
done
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C)
\[C{{H}_{3}}C{{H}_{2}}CHBrCHO\]
done
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D)
\[C{{H}_{3}}C{{H}_{2}}CB{{r}_{2}}CHO\]
done
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View Answer play_arrow
The major product of the following reaction is: \[C{{H}_{3}}\underset{Br}{\mathop{\underset{|}{\mathop{C}}\,}}\,HC{{H}_{2}}\underset{Br}{\mathop{\underset{|}{\mathop{C}}\,}}\,HC{{H}_{2}}C{{H}_{3}}\xrightarrow[heat]{KOH,C{{H}_{3}}OH}\]
A)
\[C{{H}_{2}}=CHC{{H}_{2}}CH=CHC{{H}_{3}}\]
done
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B)
\[C{{H}_{2}}=CHCH=CHC{{H}_{2}}C{{H}_{3}}\]
done
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C)
\[C{{H}_{3}}CH=C=CHC{{H}_{2}}C{{H}_{3}}\]
done
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D)
\[C{{H}_{3}}CH=CH-CH=CHC{{H}_{3}}\]
done
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View Answer play_arrow
Which of the following can be predicted from electronegativity values of elements?
A)
Dipole moment of a molecule
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B)
Valency of elements
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C)
Polarity of bonds
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D)
Position in electrochemical series
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View Answer play_arrow
Shapes of certain interhalogen compounds are stated below. Which one of them is not correctly stated?
A)
\[I{{F}_{7}}\]: pentagonal bipyramid
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B)
\[Br{{F}_{5}}\]: trigonal bipyramid
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C)
\[Br{{F}_{3}}\] : planar T-saped
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D)
\[IC{{l}_{3}}\] : planar dimeric
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View Answer play_arrow
The concentration of a reactant X decreases from 0.1 M to 0.005 M in 40 min. If the reaction follows first order kinetics, the rate of the reaction when the concentration of X is 0.01 M will be
A)
\[1.73\times {{10}^{-4}}M{{\min }^{-1}}\]
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B)
\[3.47\times {{10}^{-4}}M{{\min }^{-1}}\]
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C)
\[3.47\times {{10}^{-5}}M{{\min }^{-1}}\]
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D)
\[7.5\times {{10}^{-4}}M{{\min }^{-1}}\]
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View Answer play_arrow
Mark the false statement?
A)
A salt bridge is used to eliminate liquid junction potential.
done
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B)
The Gibbs free energy change, \[\Delta G\] is related with electromotive force E as \[\Delta G=-nFE.\]
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C)
Nernst equation for single electrode potential is \[E=E{}^\circ -\frac{RT}{nF}\log {{a}_{{{M}^{n+.}}}}\]
done
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D)
The efficiency of a hydrogen-oxygen fuel cell is 23%.
done
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View Answer play_arrow
The correct statement on the isomerism associated with the following complex ions,
[A] \[{{[Ni{{({{H}_{2}}O)}_{5}}N{{H}_{3}}]}^{2+}},\] [B] \[{{[Ni{{({{H}_{2}}O)}_{4}}{{(N{{H}_{3}})}_{2}}]}^{2+}}\]and [C] \[{{[Ni{{({{H}_{2}}O)}_{3}}{{(N{{H}_{3}})}_{3}}]}^{2+}}\]is:
A)
[A] and [B] show only geometrical isomerism
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B)
[A] and [B] show geometrical and optical isomerism
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C)
[B] and [C] show geometrical and optical 7 isomerism
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D)
[B] and [C] show only geometrical isomerism
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View Answer play_arrow
Aniline, chloroform and alcoholic KOH react to produce a bad smelling substance which is
A)
phenyl isocyanide
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B)
phenyl cyanide
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C)
chlorobenzene
done
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D)
benzyl alcohol.
done
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View Answer play_arrow
The species with a radius less than that of Ne is
A)
\[M{{g}^{2+}}\]
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B)
\[{{F}^{-}}\]
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C)
\[{{O}^{2-}}\]
done
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D)
\[{{K}^{+}}\]
done
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View Answer play_arrow
Vapour density of the equilibrium mixture of the reaction \[S{{O}_{2}}C{{l}_{2(g)}}S{{O}_{2(g)}}+C{{l}_{2(g)}}\] is 50.0. Percent dissociation of \[S{{O}_{2}}C{{l}_{2}}\] is:
A)
33.33
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B)
35.0
done
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C)
30.0
done
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D)
66.67
done
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View Answer play_arrow
The chemical reaction, \[2AgCl(s)+{{H}_{2}}(g)\xrightarrow{{}}2HCl(aq)+2Ag(s)\] taking place in a galvanic cell is represented by the notation
A)
\[Pt(s)|{{H}_{2}}(g),\]\[1\,\,bar|1\,M\,KCl(aq)|AgCl(s)|Ag(s)\]
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B)
\[Pt(s)|{{H}_{2}}(g),\]\[1\,\,bar|1\,M\,HCl(aq)|1MA{{g}^{+}}(aq)|Ag(s)\]
done
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C)
\[Pt(s)|{{H}_{2}}(g),\]\[1\,\,bar|1\,M\,HCl(aq)|AgCl(s)|Ag(s)\]
done
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D)
\[Pt(s)|{{H}_{2}}(g),\]\[1\,\,bar|1\,M\,HCl(aq)|Ag(s)|AgCl(s)\]
done
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View Answer play_arrow
The pair in which phosphorous atoms have a formal oxidation state of +3 is:
A)
Orthophosphorous and hypophosphoric acids
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B)
Pyrophosphorous and pyrophosphoric acids
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C)
Orthophosphorous and pyrophosphorous acids
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D)
Pyrophosphorous and hypophosphoric acids
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View Answer play_arrow
Of the following which is diamagnetic in nature?
A)
\[{{[Co\,{{F}_{6}}]}^{3+}}\]
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B)
\[{{[NiC{{l}_{4}}]}^{2-}}\]
done
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C)
\[{{[CuC{{l}_{4}}]}^{2-}}\]
done
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D)
\[{{[Ni{{(CN)}_{4}}]}^{2-}}\]
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View Answer play_arrow
Which of the following products is formed when benzaldehyde is treated with \[C{{H}_{3}}MgBr\] and the addition product so obtained is subjected to acid hydrolysis?
A)
A secondary alcohol
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B)
A primary alcohol
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C)
Phenol
done
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D)
tert-Butyl alcohol
done
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View Answer play_arrow
Mole fraction of methanol in its aqueous solution is 0.5. The concentration of solution in terms of percent by mass of methanol is
A)
36
done
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B)
50
done
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C)
64
done
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D)
72
done
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View Answer play_arrow
In CsCl, if coordination number of \[C{{s}^{+}}\] is 8, then coordination number of \[C{{l}^{-}}\] ion is:
A)
4
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B)
6
done
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C)
8
done
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D)
12
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View Answer play_arrow
Select the process that represents smelting.
A)
\[2A{{l}_{2}}{{O}_{3}}+6{{H}_{2}}O\xrightarrow{\Delta }4Al{{(OH)}_{3}}\]
done
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B)
\[ZnC{{O}_{3}}\xrightarrow{\Delta }ZnO+C{{O}_{2}}\]
done
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C)
\[Fe{{O}_{3}}+3C\xrightarrow{\Delta }2Fe+3CO\]
done
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D)
\[2Pb+{{O}_{2}}\xrightarrow{\Delta }2PbO+2S{{O}_{2}}\]
done
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View Answer play_arrow
Electrolytic reduction of alumina to aluminium by Hall- Heroult process is carried out
A)
in the presence of NaCl
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B)
in the presence of fluorite
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C)
in the presence of cryolite which forms a melt with lower melting temperature
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D)
in the presence of cryolite which forms a melt with higher melting temperature
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View Answer play_arrow
Complexes \[[Co{{(N{{H}_{3}})}_{5}}S{{O}_{4}}]\] Br and \[[Co{{(N{{H}_{3}})}_{5}}Br]S{{O}_{4}}\] can be distinguished by
A)
conductance measurement
done
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B)
using \[BaC{{l}_{2}}\]
done
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C)
using \[AgN{{O}_{3}}\]
done
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D)
both b and c
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View Answer play_arrow
Nylon is a :
A)
polysaccharide
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B)
polyester
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C)
polyamide
done
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D)
all of the above
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View Answer play_arrow
The major product formed in the reaction 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
The non-pofar molecule is:
A)
\[N{{F}_{3}}\]
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B)
\[S{{O}_{3}}\]
done
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C)
\[CHC{{l}_{3}}\]
done
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D)
\[Cl{{O}_{2}}\]
done
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View Answer play_arrow
The hybridization of P in\[PO_{4}^{3-}\] is the same as of
A)
\[S\,\,in\,\,S{{O}_{3}}\]
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B)
\[N\,\,in\,\,S{{O}^{-}}_{3}\]
done
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C)
\[S\,\,in\,\,SO_{4}^{--}\]
done
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D)
\[I\,\,in\,\,IC{{l}_{4}}^{-}\]
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View Answer play_arrow
Solution of potash alum is acidic in nature. This is due to hydrolysis of
A)
\[SO_{4}^{2-}\]
done
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B)
\[{{K}^{+}}\]
done
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C)
\[Al{{(S{{O}_{4}})}_{3}}\]
done
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D)
\[A{{l}^{3+}}\]
done
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View Answer play_arrow
When cone. \[HN{{O}_{3}}\] acts on our skin, the skin becomes yellow, because :
A)
\[HN{{O}_{3}}\] acts as an oxidising agent.
done
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B)
\[HN{{O}_{3}}\] acts as a dehydrating agent.
done
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C)
Nitro-cellulose is formed.
done
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D)
The proteins are converted into xanthoproteins.
done
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View Answer play_arrow
Plants reproducing by spores such as mosses and ferns are grouped under the general term
A)
Thallophytes
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B)
Cryptogams
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C)
Bryophytes
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D)
Sporophytes
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View Answer play_arrow
Which one of the following is a living fossil?
A)
Pinus
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B)
Opuntia
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C)
Ginkgo
done
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D)
Thuja
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View Answer play_arrow
Alginates (alginin), used as highly efficient gauze in internal operations are obtained from cell walls of
A)
Cyanophyceae
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B)
Phaeophyceae
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C)
Rhodophyceae
done
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D)
All of these
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View Answer play_arrow
Bryophytes resemble algae in the following aspects
A)
Filamentous body, presence of vascular tissues and autotrophic nutrition
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B)
Differentiation of plant body into root, stem and leaves and autotrophic nutrition
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C)
Thallus like plant body, presence of root and autotrophic nutrition
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D)
Thallus like plant body, lack of vascular tissues and autotrophic nutrition
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View Answer play_arrow
Two flower structures are shown in the figure.
Mark the correct interpretation: (1) (2)
A)
1 is primitive and 2 is advanced
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B)
1 is advanced and 2 is primitive
done
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C)
both are advanced flower structures
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D)
both are primitive flower structures
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View Answer play_arrow
When gynoecium is present in the top most position of thalamus, the flower is known as
A)
inferior epigynous
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B)
perigynous
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C)
hypogynous
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D)
done
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View Answer play_arrow
Even after killing the generative cell with a laser beam, the pollen grain of a flowering plant germinates and produces normal pollen tube because :
A)
Laser beam stimulates pollen germination and pollen tube growth
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B)
Laser beam does not damage the region from which pollen tube emerges
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C)
The contents of the killed generative cell permit germination and pollen growth
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D)
The vegetative cell has not been damaged
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View Answer play_arrow
In land plants, the guard cells differ from other epidermal cells in having
A)
cytoskeleton
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B)
mitochondria
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C)
endoplasmic reticulum
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D)
chloroplasts
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View Answer play_arrow
Which option is correctly matched with the diagrams?
A)
A-Valvate B-Twisted, C-Imbricate, D-Vexillary
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B)
A-Vexillary B-Valvate, C-Twisted, D-Imbricate
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C)
A-Imhricate, B-Vexillary, C-Valvate, D-Twisted
done
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D)
A-Twisted, B-Imbricate, C-Vexillary, D-Valvate
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View Answer play_arrow
In which of the following cell organelles would you expect to find the biochemical reactions that harness energy from the breakdown of sugar molecules to synthesize large amounts of ATP?
A)
Lysosome
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B)
Vesicles
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C)
Chloroplast
done
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D)
Mitochondrion
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View Answer play_arrow
Pre-messenger RNAs must be processed in the nucleus in order to
A)
increase their stability in the cytoplasm.
done
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B)
allow transcription to begin.
done
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C)
permit coding sequences to be joined to adjacent noncoding sequences.
done
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D)
facilitate ribosome recognition in preparation for DNA synthesis
done
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View Answer play_arrow
The given graph shows the effect of substrate concentration on the rate of reaction of the enzyme green gramphosphatase. What does the graph indicate?
A)
The rate of enzyme reaction is directly proportional to the substrate concentration
done
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B)
Presence of an enzyme inhibitor in the reaction mixture
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C)
Formation of an enzyme-substrate complex
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D)
At higher substrate-concentration the pH increases.
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View Answer play_arrow
The Km value of the enzyme is the value of the substrate concentration at which the reaction reaches to
A)
Zero
done
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B)
2 Vmax
done
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C)
½ Vmax
done
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D)
¼ Vmax
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View Answer play_arrow
A plant cell placed in pure water will
A)
expand until the osmotic potential or solute potential reaches that of water.
done
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B)
becomes more turgid until the pressure potential of cell reaches its osmotic potential.
done
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C)
becomes more turgid until the osmotic potential reaches that of pure water.
done
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D)
becomes less turgid until the osmotic potential reaches that of pure water.
done
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View Answer play_arrow
During cell division, sometimes there will be failure of separation of sister chromatids. This event is called
A)
interference
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B)
complementation
done
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C)
non-disjunction
done
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D)
coincidence
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View Answer play_arrow
In which stage of the cell cycle histone proteins synthesized in a eukaryotic cell?
A)
During \[{{G}_{2}}\] stage of prophase
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B)
During S-phase
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C)
During entire prophase
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D)
During telophase
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View Answer play_arrow
Which of the following is not a correct pairing of a macronutrient and the major functions it performs in the life of a plant?
A)
Potassium-enzyme activation, water balance, ion balance.
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B)
Calcium-activity of membranes and cytoskeleton, second messenger.
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C)
Sulphur-in proteins and coenzymes.
done
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D)
Iron-in active sites of many redox enzymes and electron carriers.
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View Answer play_arrow
Which of the following statement is false?
A)
\[{{H}_{2}}S,\] not \[{{H}_{2}}O,\] is involved in photosynthesis of purple sulphur bacteria.
done
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B)
Light and dark reactions are stopped in the absence of light.
done
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C)
Calvin cycle occurs in the grana of chloroplast.
done
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D)
ATP is produced during light reaction via chemiosmosis.
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View Answer play_arrow
In mitochondria, protons accumulate in the
A)
outer membrane
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B)
inner membrane
done
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C)
intermembrane space
done
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D)
matrix
done
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View Answer play_arrow
'Whip-tail' disease in cauliflower is due to deficiency of
A)
manganese
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B)
magnesium
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C)
molybdenum
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D)
nitrogen
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View Answer play_arrow
A biochemist mixed 10 drops of acid with 100 mL of water, and the pH dropped from 7.4 to 5.0. She then mixed 10 drops of acid with 100 mL of blood. The pH dropped from 7.4 to 7.2. What is the reason for this difference?
A)
Blood is thicker than water.
done
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B)
Blood is already very acidic, so the acid has less effect.
done
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C)
Blood is saturated with oxygen; there is little room for acid.
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D)
Blood contains buffers that reduce pH change.
done
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View Answer play_arrow
The main purpose of electron transport chain is to
A)
cycle \[NADH+{{H}^{+}}\] back to \[NA{{D}^{+}}\]
done
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B)
use the intermediates from TCA cycle
done
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C)
breakdown pyruvate
done
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D)
all of the above
done
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View Answer play_arrow
Given below is the pathway of light reaction. Identify the given blanks indicated by A, B, C, D and E.
A)
A - P 700 B - \[{{H}^{+}}\] acceptor C - P680 D - \[NAD{{P}^{+}}\]
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B)
A - Photosystem I B - \[{{e}^{-}}\] acceptor C - Photosystem II D - \[NADP{{H}_{2}}^{+}ATP\]
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C)
A - Photosystem II B - \[{{H}^{+}}\] acceptor C - P700 D - \[NADPH\]
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D)
A - Photosystem II B - \[{{e}^{-}}\] acceptor C - Photosystem I D - \[NADPH+{{H}^{+}}\]
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View Answer play_arrow
In tissue culture, roots can be induced by
A)
no cytokinin and only auxins.
done
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B)
higher concentration of cytokinin and lower concentration of auxins.
done
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C)
lower concentration of cytokinin and higher concentration of auxins.
done
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D)
only cytokinin and no auxins.
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View Answer play_arrow
Which one of the following techniques made it possible to genetically engineer living organism?
A)
Recombinant DNA techniques
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B)
X-ray diffraction
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C)
Heavier isotope labelling
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D)
Hybridization
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View Answer play_arrow
Which one of the following is a natural growth inhibitor?
A)
NAA
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B)
ABA
done
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C)
IAA
done
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D)
GA
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View Answer play_arrow
Ovary in a tomato flower had numerous ovules but fruit had only 40 seeds at maturity. The remaining ovules were
A)
used in making fruit wall
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B)
converted into juicy liquid
done
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C)
destroyed
done
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D)
ejected out of ovary
done
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View Answer play_arrow
Unisexuality of flowers prevents
A)
autogamy, but not geitonogamy
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B)
both geitonogamy and xenogamy
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C)
geitonogamy, but not xenogamy
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D)
autogamy and geitonogamy
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View Answer play_arrow
One of the important consequences of geographical isolation is
A)
preventing speciation
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B)
speciation through reproductive isolation
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C)
random creation of new species
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D)
no change in the isolated fauna.
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View Answer play_arrow
If the age distribution (per cent individuals of a given age or group) is plotted for the population, the resulting structure is called a/an
A)
population density
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B)
ecological pyramid
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C)
population growth
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D)
age pyramid
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View Answer play_arrow
Three crops that contribute maximum to global food grain production are
A)
Wheat, rice and maize
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B)
Wheat, rice and barley
done
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C)
Wheat, maize and sorghum
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D)
Rice, maize and sorghum
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View Answer play_arrow
Farmers have reported over 50% higher yields of rice by using the biofertilizer
A)
Azolla pinnata
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B)
Spirogyra
done
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C)
Legume-Rhizobium symbiosis
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D)
Mycorrhiza
done
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View Answer play_arrow
Himgiri developed by hybridisation and selection for disease resistance against rust pathogens is a variety of
A)
chilli
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B)
maize
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C)
sugarcane
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D)
wheat
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View Answer play_arrow
Which of the following ecological pyramid is never inverted?
A)
Pyramid of number in forest ecosystem
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B)
Pyramid of biomass in pond ecosystem
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C)
Pyramid of energy in parasitic food chain
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D)
Pyramid of biomass in parasitic food chain
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View Answer play_arrow
In agarose gel electrophoresis
A)
DNA migrates towards the negative electrode
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B)
supercoiled plasids migrate slower than their nicked counterparts
done
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C)
larger molecules migrate faster than smaller molecules
done
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D)
ethidium bromide can be used to visualize the DNA
done
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View Answer play_arrow
The genetically-modified (GM) brinjal in India has been developed for:
A)
insect-resistance
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B)
enhancing shelf life
done
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C)
enhancing mineral content
done
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D)
drought-resistance
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View Answer play_arrow
Which one of the following pairs of organisms are exotic species introduced in India?
A)
Nile perch, Ficus religiosa
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B)
Ficus religiosa, Lantana camara
done
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C)
Lantana camara. Water hyacinth
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D)
Water hyacinth, Prosopis cineraria
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View Answer play_arrow
Which one of the following expanded forms of the following acronyms is correct?
A)
IPCC = International Panel for Climate Change
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B)
UNEP = United Nations Environmental Policy
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C)
EPA= Environmental Pollution Agency
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D)
IUCN = International Union for Conservation of Nature and Natural Resources
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Photochemical smog pollution does not contain
A)
Nitrogen dioxide
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B)
Carbon dioxide
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C)
PAN (peroxy acetyl nitrate)
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D)
Ozone
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When huge amount of sewage is dumped into a river, its B.O.D. will
A)
increase
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B)
decrease
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C)
sharply decrease
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D)
remain unchanged
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If at high altitudes, birds become rare, the plants likely to disappear are:
A)
Pine
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B)
Orchids
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C)
Oak
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D)
Rhododendrons
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The greatest biomass of autotrophs in the oceans is that of
A)
sea grasses and slime moulds
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B)
free floating microalgae, cyanobacteria and nanoplankton
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C)
benthic brown algae, coastal red algae and daphnids
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D)
benthic diatoms and marine viruses
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Which of the following is based upon the principle of antigen-antibody interaction?
A)
PCR
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B)
ELISA
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C)
RDNA technology
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D)
RNA
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The figure below shows three steps (A, B, C) of Polymerase Chain Reaction (PCR). Select the option giving correct identification together with what it represents?
A)
B - Denaturation at a temperature of about \[98{}^\circ C\] separating the two DNA strands.
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B)
A - Denaturation at a temperature of about \[50{}^\circ C.\]
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C)
C - Extension in the presence of heat stable DNA polymerase.
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D)
A - Annealing with two sets of primers.
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Which of the following statement(s) is/are true?
(i) Uneven thickening of cell wall is characteristic of sclerenchyma. (ii) Periblem forms cortex of the stem and the root. (iii) Tracheids are the chief water transporting elements in gymnosperms. (iv) Companion cell is devoid of nucleus at maturity. (v) The Commercial cork is obtained from Quercus suber.
A)
(i) and (iv) only
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B)
(ii) and (v) only
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C)
(iii) and (iv) only
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D)
(ii), (iii) and (v) only
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In prokaryotes, the genetic material is
A)
linear DNA with histones
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B)
circular DNA with histones
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C)
linear DNA without histones
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D)
circular DNA without histones
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Which animal needs to drink the smallest amount of water to maintain its water balance?
A)
a sparrow
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B)
a saltwater fish
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C)
a freshwater fish
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D)
a dog
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Animals with metameric segmentation, bilateral symmetry and closed circulatory system belong to phylum
A)
Annelida
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B)
Echinodermata
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C)
Arthropoda
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D)
Mollusca
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Which one of the following characters is not typical of the class Mammalia?
A)
Thecodont dentition
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B)
Alveolar lungs
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C)
Ten pairs of cranial nerves
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D)
Seven cervical vertebrae
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In humans, coccyx is formed by the fusion of
A)
3 vertebra
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B)
4 vertebra
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C)
5 vertebra
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D)
6 vertebra
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Which one of the following cellular components of the blood is responsible for the production of antibodies?
A)
Thrombocyte
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B)
Lymphocyte
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C)
Monocyte
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D)
Erythrocyte
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Rigidity that develops in the muscle after death is known as:
A)
Rigor mortis
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B)
Tetanus
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C)
Twitch
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D)
Treppe
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Which one of the following pairs of the kind of cells and their secretion is correctly matched?
A)
Oxyntic cells-a secretion with pH between 2.0 and 3.0
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B)
Alpha cells of islets of Langerhans-secretion that decreases blood sugar level
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C)
Kupffer cell-a digestive enzyme that hydrolyses nucleic acids
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D)
Sebaceous glands-a secretion that evaporates for cooling
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In cockroach, the corpora allata is
A)
A sense organ
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B)
A tactile organ
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C)
An endocrine organ
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D)
A digestive gland
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Which group contains biocatalysts?
A)
Myosin, oxytocin, adrenalin
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B)
Peptidase, amylase, rennin
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C)
Glucose, amino acids, fatty acids
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D)
Rhodopsin, pepsin, steapsin
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Both the crown and root of a tooth is covered by a layer of bony hard substance. It is called
A)
enamel
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B)
dentine
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C)
bony socket
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D)
cementum
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The respiratory centre, which regulates respiration, is located in
A)
Cerebral peduncle
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B)
Vagus nerve
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C)
Pons
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D)
Medulla oblongata
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Even when there is no air in it, human trachea does not collapse due to presence of
A)
bony rings
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B)
turgid pressure
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C)
chitinous rings
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D)
cartilaginous rings
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The structure which does not contribute to the breathing movements in mammals is
A)
larynx
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B)
ribs
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C)
diaphragm
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D)
intercostal muscles
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Find out the incorrect answer from the following?
A)
Veins are typically larger in diameter than arteries
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B)
Because of their small size, capillaries contain blood that is moving more quickly than in other parts of the circulatory system
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C)
The walls of arteries are elastic, enabling them to stretch and shrink during changes in blood pressure
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D)
Veins contain more blood than any other part of the circulatory system
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Given below are four statements (i-iv) regarding human blood circulatory system
(i) Arteries are thick-walled and have narrow lumen as compared to veins (ii) Angina is acute chest pain when the blood circulation to the brain is reduced (iii) Persons with blood group AB can donate blood to any person with any blood group under ABO system (iv) Calcium ions play a very important role in blood clotting Which two of the above statements are correct?
A)
(i) and (iv)
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B)
(i) and (iv)
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C)
(ii) and (iii)
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D)
(iii) and (iv)
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The diagram below shows some biochemical pathways in a liver cell. Some of the points where hormones affect the pathways are labelled 1 to 5.
At which numbered points would the hormone insulin accelerate the pathways in the directions indicated?
A)
1, 2 and 3
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B)
1, 2 and 5
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C)
1, 3 and 4
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D)
2, 3 and 4
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Columns of Bertini in the kidneys of mammals are formed as extensions of
A)
Cortex into medulla
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B)
Cortex into pelvis
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C)
Medulla into pelvis
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D)
Pelvis into ureter
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Consider the following four statements (i - iv) about certain desert animals such as kangaroo rat
(i) They have dark colour and high rate of reproduction and excrete solid urine (ii) They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs (iii) They feed on dry seeds and do not require drinking water (iv) They excrete very concentrated urine and do not use water to regulate body temperature. Which two of the above statements for such animals are true?
A)
(i) and (ii)
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B)
(iii) and (iv)
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C)
(ii) and (iii)
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D)
(iii) and (i)
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Which of the following act as antigens, but do not induce antibody production?
A)
Haustra
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B)
Histones
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C)
Haptens
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D)
None of these
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Thin filaments of skeletal muscle fibres contain
A)
Actin protein only
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B)
Actin and myosin proteins
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C)
Actin, Troponin and Tropomyosin proteins
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D)
Actin, Troponin, Myosin and Tropomyosin proteins
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The joint in our neck which allows us to rotate our head left to right is
A)
pivot joint
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B)
hinge joint
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C)
saddle joint
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D)
ellipsoid joint
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Among which one of the following groups of chemicals, all are neurotransmitters?
A)
Glycine, dopamine, melatonin
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B)
Somatostatin, serotonin, acetylcholine
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C)
Noradrenaline, somatostatin, threonine
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D)
Acetylcholine, noradrenaline, dopamine
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The enzyme required for the conduction of nerve impulse across synapse is:
A)
peroxidase
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B)
choline acetylase
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C)
ascorbic acid oxidase
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D)
succinic dehydrogenase
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The purplish red pigment rhodopsin contained in the rods type of photoreceptor cells of the human eye, is a derivative of
A)
Vitamin A
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B)
Vitamin \[{{B}_{1}}\]
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C)
Vitamin C
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D)
Vitamin D
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Which hormone interacts with membrane bound receptor and does not normally enter the target cell?
A)
Follicle stimulating hormone
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B)
Estrogen
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C)
Thyroxine
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D)
Cortisol
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The 24 hour (diurnal) rhythm of our body such as the sleep-wake cycle is regulated by the hormone
A)
adrenaline
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B)
melatonin
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C)
calcitonin
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D)
prolactin
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Steroid hormones transmit their information by
A)
stimulating the receptors present on cell membrance
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B)
entering into the cell and modifying cellular contents .
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C)
entering into the cell and modifying nuclear organization
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D)
the help of an intracellular second messenger
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Which of the following statements is false?
A)
As life span increases, so does the length of each developmental stage.
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B)
Relative to other organisms, the length of a human child's nonreproductive years is short.
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C)
The reproductive phase of life is generally longer for human males than for females.
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D)
Relative to most animals, humans attain a larger percent of full adult weight before reproduction begins.
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In oogamy, fertilization involves
A)
a small non-motile female gamete and a large motile male gamete
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B)
a large non-motile female gamete and a small motile male gamete
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C)
a large non-motile female gamete and a small non motile male gamete
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D)
a large motile female gamete and a small nonmotile male gamete
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Which of the following is known as "cochlear duct"?
A)
Scala vestibule
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B)
Scalatympani
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C)
Scala media
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D)
None
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Correct sequence of cell stages in spermatogenesis is:
A)
spermatocytes, spermatids, spermatogonia, spermatozoa
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B)
spermatogonia, spermatocytes, spermatids, spermatozoa
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C)
spermatocytes, spermatogonia, spermatids, spermatozoa
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D)
spermatogonia, spermatids, spermatocytes, spermatozoa
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Progestasert and LNG-20 are
A)
Implants
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B)
Copper releasing ILJDs
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C)
Non-medicated IUDs
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D)
Hormone releasing IUDs
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Which one of the following conditions correctly describes the manner of determining the sex in the given example?
A)
Homozygous sex chromosomes (ZZ) determine female sex in birds.
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B)
XO type of sex chromosomes determine male sex in grasshopper.
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C)
XO condition in human as found in Turner syndrome, determines female sex.
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D)
Homozygous sex chromosomes (XX) produce male in Drosophila.
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Select the correct statement from the ones given below with respect to dihybrid cross.
A)
Tightly linked genes on the same chromosome show higher recombinations
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B)
Genes far apart on the same chromosome show very few recombinations
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C)
Genes loosely linked on the same chromosome show similar recombinations as the tightly linked ones
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D)
Tightly linked genes on the same chromosome show very few recombinations
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One gene-one enzyme relationship was established for the first time in
A)
Salmonella typhimurium
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B)
Escherichia coli
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C)
Diplocococcus pneumonia
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D)
Neurospora crassa.
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Which of the following is the first thing that happens when a signal molecule acts on a target cell?
A)
A transcription factor acts on the DNA.
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B)
The signal molecule binds to RNA.
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C)
A new protein is made in the target cell.
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D)
The signal molecule binds to a receptor.
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In emphysema -
A)
Gas exchange area of lungs is reduced
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B)
Gas exchange area of lungs is increased
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C)
Trachea gets narrowed
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D)
Larynx is permanently closed
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Damage to thymus in a child may lead to -
A)
a reduction in haemoglobin content of blood
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B)
a reduction in stem cell production
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C)
loss of antibody mediated immunity
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D)
loss of cell mediated immunity
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Two microbes found to be very useful in genetic engineering are
A)
Vibrio cholerae and a tailed bacteriophage
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B)
Diplococcus sp. and Pseudomonas sp.
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C)
Crown gall bacterium and Caenorhabditis elegans
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D)
Escherichia coli and Agrobacterium tumefaciens
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An ?Urn? shaped population age pyramid represents
A)
Growing population
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B)
Static population
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C)
Declining population
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D)
Threatenped population
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Study the four statements (i-iv) given below and select the two correct ones out of them:
(i) A lion eating a deer and a sparrow feeding on grain are ecologically similar in being consumers (ii) Predator star fish Pisaster helps in maintaining species diversity of some invertebrates (iii) Predators ultimately lead to the extinction of prey species (iv) Production of chemicals such as nicotine, strychnine by the plants are metabolic disorders The two correct statements are:
A)
(ii) and (iii)
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B)
(iii) and (iv)
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C)
(i) and (iv)
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D)
(i)and(ii)
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Largest chromosome number in plant kingdom is (2n = 1262). It is found in
A)
Adiantum
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B)
Dryopteris
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C)
Pteris
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D)
Ophioglossum
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The amino acid which has maximum buffering capacity at physiologic pH is:
A)
Arginine
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B)
Alanine
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C)
Histidine
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D)
Glutamic acid
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Which one of the following pairs of structures is correctly matched with their correct description?
A)
Structures - Tibia and fibula Description - Both form parts of knee joint
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B)
Structures - Cartilage and cornea Description - No blood supply but do require oxygen for
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C)
respiratory need Structures - Shoulder joint and elbow joint Description - Ball and socket type of joint
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D)
Structures - Premolars and molars Description - 20 in all and 3-rooted
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