In a hydrogen atom, the binding energy of the electron in the ground state is \[{{E}_{1}}.\]Then the frequency of revolution of the electron in the nth orbit is
A)
\[\frac{2{{E}_{1}}}{{{n}^{3}}h}\]
done
clear
B)
\[\frac{2{{E}_{1}}{{n}^{3}}}{h}\]
done
clear
C)
\[\sqrt{\frac{2m{{E}_{1}}}{{{n}^{3}}h}}\]
done
clear
D)
\[\frac{{{E}_{1}}{{n}^{2}}}{h}\]
done
clear
View Answer play_arrow
A radioactive isotope is being produced at a constant rate X. Half-life of the radioactive substance is Y. After some time, the number of radioactive nuclei become constant. The value of this constant is
A)
\[\frac{XY}{\ell n(2)}\]
done
clear
B)
\[XY\]
done
clear
C)
\[XY\ln (2)\]
done
clear
D)
\[\frac{X}{Y}\]
done
clear
View Answer play_arrow
A proton and an \[\alpha -\]particle are accelerated through the same potential differences. The ratio of their de-Broglie wavelengths is
A)
\[\sqrt{2}\]
done
clear
B)
\[\frac{1}{2}\sqrt{2}\]
done
clear
C)
\[2\sqrt{2}\]
done
clear
D)
2
done
clear
View Answer play_arrow
Radiations of frequency v are incident on a photo sensitive metal. The maximum kinetic energy of the photo electrons is E. When the frequency of the incident radiations is doubled, what is the maximum kinetic energy of the photoelectrons?
A)
2E
done
clear
B)
4E
done
clear
C)
\[E+hv\]
done
clear
D)
\[E-hv\]
done
clear
View Answer play_arrow
The escape velocity of a body projected vertically upwards from the surface of the earth is d. If the body is projected at an angle of \[30{}^\circ \] with the horizontal, the escape velocity would be
A)
\[\frac{\upsilon }{2}\]
done
clear
B)
\[\sqrt{3}\frac{\upsilon }{2}\]
done
clear
C)
\[2\upsilon \]
done
clear
D)
\[\upsilon \]
done
clear
View Answer play_arrow
When a force is applied at one end of an elastic wire, it produces a strain £ in the wire. If Y is the Young's modulus of the material of the wire, the amount of energy stored per unit volume of the wire is given by
A)
\[Y\times e\]
done
clear
B)
\[\frac{1}{2}(Y\times \varepsilon )\]
done
clear
C)
\[Y\times {{\varepsilon }^{2}}\]
done
clear
D)
\[\frac{1}{2}(Y\times {{\varepsilon }^{2}})\]
done
clear
View Answer play_arrow
The wavelength \[\lambda \] of the \[{{K}_{\alpha }}\]X-ray line with an anticathode element of atomic number Z is nearly proportional to:
A)
\[{{Z}^{2}}\]
done
clear
B)
\[{{(Z-1)}^{2}}\]
done
clear
C)
\[\frac{1}{(z-1)}\]
done
clear
D)
\[\frac{1}{{{(z-1)}^{2}}}\]
done
clear
View Answer play_arrow
An open and a closed pipe have same length. The ratio of frequencies of their nth overtone is:
A)
\[\frac{n+1}{(2n+1)}\]
done
clear
B)
\[\frac{2(n+1)}{(2n+1)}\]
done
clear
C)
\[\frac{n}{(2n+1)}\]
done
clear
D)
\[\frac{(n+1)}{2n}\]
done
clear
View Answer play_arrow
Two trains, one is coming towards and another is going away from an observer both at 4 m/s produce a whistle simultaneously of frequency 300 Hz. Find the number of beats produced:
A)
5
done
clear
B)
6
done
clear
C)
7
done
clear
D)
12
done
clear
View Answer play_arrow
A mass is suspended separately by two springs of spring constant\[{{k}_{1}}\]and \[{{k}_{2}}\]in successive order. The time periods of oscillations in the two cases are \[{{T}_{1}}\] and \[{{T}_{2}},\]respectively. If the same mass be suspended by connecting two springs in parallel (as shown in the figure) then the time period of the oscillation is T. The correct relation is:
A)
\[{{T}^{2}}=T_{1}^{2}+T_{2}^{2}\]
done
clear
B)
\[{{T}^{-2}}=T_{1}^{-2}+T_{2}^{-2}\]
done
clear
C)
\[{{T}^{-1}}={{T}_{1}}^{-1}+{{T}_{2}}^{-1}\]
done
clear
D)
\[T={{T}_{1}}+{{T}_{2}}\]
done
clear
View Answer play_arrow
The potential energy of a simple harmonic oscillator when the particle is half way to its end point is (where E is the total energy):
A)
\[\left( \frac{1}{8} \right)E\]
done
clear
B)
\[\left( \frac{1}{4} \right)E\]
done
clear
C)
\[\left( \frac{1}{2} \right)E\]
done
clear
D)
\[\left( \frac{2}{3} \right)E\]
done
clear
View Answer play_arrow
A pendulum clock having copper rod keeps correct time at \[20{}^\circ C\]. It gains 15 seconds per day if cooled to \[0{}^\circ C\]. The coefficient of linear expansion of copper is:
A)
\[1.7\times {{10}^{-4}}/{{\,}^{o}}C\]
done
clear
B)
\[1.7\times {{10}^{-5}}/{{\,}^{o}}C\]
done
clear
C)
\[3.4\times {{10}^{-4}}/{{\,}^{o}}C\]
done
clear
D)
\[3.4\times {{10}^{-5}}/{{\,}^{o}}C\]
done
clear
View Answer play_arrow
Three stars A, B, and C appear as green, red, and blue, respectively. The star having minimum temperature is
A)
A
done
clear
B)
B
done
clear
C)
C
done
clear
D)
all
done
clear
View Answer play_arrow
If one mole of a monatomic gas \[\gamma =\frac{5}{3}\]is mixed with one mole of a diatomic gas \[\gamma =\frac{7}{5},\]the value of \[\gamma \]for the mixture is
A)
1.40
done
clear
B)
1.50
done
clear
C)
1.53
done
clear
D)
3.07
done
clear
View Answer play_arrow
During an adiabatic process, the pressure of a gas is proportional to the cube of its absolute temperature. The value of\[\frac{{{C}_{p}}}{{{C}_{v}}}\]for the gas is:
A)
\[\frac{3}{5}\]
done
clear
B)
\[\frac{4}{3}\]
done
clear
C)
\[\frac{5}{3}\]
done
clear
D)
\[\frac{3}{2}\]
done
clear
View Answer play_arrow
A metre stick is held vertically with one end on the floor and is then allowed to fall. If the end touching the floor is not allowed to slip, the other end will hit the ground with a velocity of (Take\[~g=9.8\text{ }m/{{s}^{2}}\])
A)
3.2 m/s
done
clear
B)
5.4 m/s
done
clear
C)
7.6 m/s
done
clear
D)
9.2 m/s
done
clear
View Answer play_arrow
A solid sphere is rolling on a frictionless surface shown in the figure with a translational velocity \[\upsilon \,m/s.\]If the sphere climbs up to a height h then value of \[\upsilon \]should be
A)
\[\ge \sqrt{\frac{10}{7}gh}\]
done
clear
B)
\[\ge \sqrt{2gh}\]
done
clear
C)
\[\sqrt{2gha}\]
done
clear
D)
\[\frac{10}{7}gh\]
done
clear
View Answer play_arrow
In a series LCR circuit the voltage across the resistance, capacitance and inductance is 10 V each. If the capacitance is short circuited, the voltage across the inductance will be:
A)
10 V
done
clear
B)
\[10\sqrt{2}\,V\]
done
clear
C)
\[\left( \frac{10}{\sqrt{2}} \right)V\]
done
clear
D)
20 V
done
clear
View Answer play_arrow
The diode used in the circuit shown in the figure has a constant voltage drop of 0.5 V at all currents and a maximum power rating of 100 milliwatts. What should be the value of the resistor R, connected in series with the diode, for obtaining maximum current?
A)
\[1.5\,\Omega \]
done
clear
B)
\[5\,\Omega \]
done
clear
C)
\[6.67\,\Omega \]
done
clear
D)
\[200\Omega \]
done
clear
View Answer play_arrow
A body at rest breaks up into 3 parts. If 2 parts having equal masses fly off perpendicularly after explosion, each with a velocity of 12 m/s, then the velocity of the third part, which has 3 times the mass of each of the other two parts is
A)
\[4\sqrt{2}\,m/s\]at an angle of \[45{}^\circ \] from each body
done
clear
B)
\[24\sqrt{2}\,m/s\] at an angle of \[135{}^\circ \] from each body
done
clear
C)
\[6\sqrt{2}\,m/s\] at \[135{}^\circ \] from each body
done
clear
D)
\[4\sqrt{2}\,m/s\] at \[135{}^\circ \] from each body
done
clear
View Answer play_arrow
The bob A of a simple pendulum is released when the string makes an angle of \[45{}^\circ \] with the vertical. It collides with another bob B of the same material and same mass kept at rest on a table. If the collision is elastic
A)
Both A and B rise to same height
done
clear
B)
Both A and B come to rest at B
done
clear
C)
Both A and B move with the same velocity of A
done
clear
D)
A comes to rest and B moves with the velocity of A
done
clear
View Answer play_arrow
A particle of mass m at rest is acted upon by a force F for a time t. Its Kinetic energy after an interval t is
A)
\[\frac{{{F}^{2}}{{t}^{2}}}{m}+6\]
done
clear
B)
\[\frac{{{F}^{2}}{{t}^{2}}}{2m}\]
done
clear
C)
\[\frac{{{F}^{2}}{{t}^{2}}}{3m}\]
done
clear
D)
\[\frac{Ft}{2m}\]
done
clear
View Answer play_arrow
What are the dimensions of latent heat?
A)
\[M{{L}^{2}}{{T}^{-2}}\]
done
clear
B)
\[M{{L}^{-2}}{{T}^{-2}}\]
done
clear
C)
\[{{M}^{0}}L{{T}^{-2}}\]
done
clear
D)
\[{{M}^{0}}{{L}^{2}}{{T}^{-2}}\]
done
clear
View Answer play_arrow
A body travels uniformly a distance of \[(13.8\,\pm \,0.2)m\]in a time\[(4.0\,\pm \,0.3)s.\]The velocity of the body within error limits is
A)
\[(3.45\pm 0.2)m{{s}^{-1}}\]
done
clear
B)
\[(3.45\pm 0.3)m{{s}^{-1}}\]
done
clear
C)
\[(3.45\pm 0.4)m{{s}^{-1}}\]
done
clear
D)
\[(3.45\pm 0.5)m{{s}^{-1}}\]
done
clear
View Answer play_arrow
A simple pendulum with a bob of mass m swings with an angular amplitude of \[60{}^\circ \] , when its angular displacement is \[30{}^\circ \], the tension of string would be
A)
\[3\sqrt{3}\,mg\]
done
clear
B)
\[\frac{1}{2}\,mg(3\sqrt{3}-2)\]
done
clear
C)
\[\frac{1}{2}\,mg(3\sqrt{3}+2)\]
done
clear
D)
\[\frac{1}{2}\,mg(3-\sqrt{2})\]
done
clear
View Answer play_arrow
A long horizontal rod has a bead, which can slide along its length, and initially placed at a distance L from one end A of the rod. The rod is set in angular motion about A with constant angular acceleration. If the coefficient of friction between the rod and the bead is, and gravity is neglected, then the time after, which the bead starts slipping is
A)
\[\sqrt{\frac{\mu }{\alpha }}\]
done
clear
B)
\[\frac{\mu }{\alpha }\]
done
clear
C)
\[\frac{1}{\sqrt{\mu \alpha }}\]
done
clear
D)
None of these
done
clear
View Answer play_arrow
A horizontal force of 10 N is necessary to just hold a block stationary against a wall. The coefficient of friction between the block and the wall is 0.2. The weight of the block is:
A)
20 N
done
clear
B)
50 N
done
clear
C)
100 N
done
clear
D)
2 N
done
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View Answer play_arrow
Two wooden blocks are moving on a smooth horizontal surface, such that the mass m remains stationary with respect to block of mass M as shown in the figure. The magnitude of force P is
A)
\[g\tan \,\beta \]
done
clear
B)
\[mg\,\cos \beta \]
done
clear
C)
\[(M+m)\cos ec\beta \]
done
clear
D)
\[(M+m)g\tan \beta \]
done
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View Answer play_arrow
Two blocks A and B of masses 2 m and m, respectively are connected by a massless and in extensible string. The whole system is suspended by a mass-less spring as shown in the figure. The magnitude of acceleration of A and B immediately after the string is cut are respectively
A)
\[\frac{g.g}{2}\]
done
clear
B)
\[\frac{g}{2},g\]
done
clear
C)
\[g.g\]
done
clear
D)
\[\frac{g}{2},\frac{g}{2}\]
done
clear
View Answer play_arrow
In the arrangement shown, the pulleys are fixed and ideal, the strings are light, \[{{m}_{1}}>{{m}_{2}},\]and S is a spring balance, which is itself massless. The reading of S (in units of mass) is
A)
\[{{m}_{1}}-{{m}_{2}}\]
done
clear
B)
\[\frac{1}{2}({{m}_{1}}+{{m}_{2}})\]
done
clear
C)
\[\frac{{{m}_{1}}{{m}_{2}}}{{{m}_{1}}+{{m}_{2}}}\]
done
clear
D)
\[\frac{2{{m}_{1}}{{m}_{2}}}{{{m}_{1}}+{{m}_{2}}}\]
done
clear
View Answer play_arrow
An equilateral triangular loop ADC having some resistance is pulled with a constant velocity v out of a uniform magnetic field directed into the paper. At time t = 0, side DC of the loop is the edge of the magnetic field. The induced current (i) versus time\[(t)\] graph will be as
A)
done
clear
B)
done
clear
C)
done
clear
D)
done
clear
View Answer play_arrow
A square loop of side 1 m is placed in a perpendicular magnetic field. Half of the area of the loop lies inside the magnetic field. A battery of emf 10 V and negligible internal resistance is connected in the loop. The magnetic field changes with time according to the relation \[B=(0.01-2t)\]Tesla. The net emf in the circuit will be
A)
1 V
done
clear
B)
11 V
done
clear
C)
9 V
done
clear
D)
10 V
done
clear
View Answer play_arrow
A real image is formed by a convex lens. If we put it in contact with a concave lens and the combination again forms a real image, which of the following is true for the new image from the combination?
A)
Shifts towards the lens system
done
clear
B)
Shifts away from the lens system
done
clear
C)
Remains at the original position
done
clear
D)
No image is formed
done
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View Answer play_arrow
A convex lens of focal length f is placed somewhere in between an object and a screen so that an image is formed on the screen. The distance between the object and the screen is\[x.\]If the magnitude of magnification produced by the lens is m, the focal length of the lens is:
A)
\[\frac{mx}{{{(m+1)}^{2}}}\]
done
clear
B)
\[\frac{mx}{{{(m-1)}^{2}}}\]
done
clear
C)
\[\frac{{{(m+1)}^{2}}x}{m}\]
done
clear
D)
\[\frac{{{(m-1)}^{2}}x}{m}\]
done
clear
View Answer play_arrow
A string of negligible mass going over a clamped pulley of mass m supports a block of mass M as shown in the figure. The force on the pulley by the clamp is given by
A)
\[\sqrt{2}mg\]
done
clear
B)
\[\sqrt{2}mg\]
done
clear
C)
\[[\sqrt{{{(M+m)}^{2}}+{{m}^{2}}}]g\]
done
clear
D)
\[[\sqrt{{{(M+m)}^{2}}+{{M}^{2}}}]g\]
done
clear
View Answer play_arrow
A block of mass 4 kg is placed on a rough horizontal plane. A time dependent force \[F=k{{t}^{2}}\]acts on the block, where \[k=2\text{ }N/{{s}^{2}}.\]Coefficient of friction\[\mu =0.8.\] Force of friction between the block and the plane at t = 2 s is
A)
32 N
done
clear
B)
4 N
done
clear
C)
2 N
done
clear
D)
8 N
done
clear
View Answer play_arrow
A particle of mass m moving towards the east with speed \[\upsilon \]collides with another particle of same mass and same speed\[\upsilon \]moving towards north. If two particles stick to each other, the new particle of mass 2 m will have a speed of
A)
\[\upsilon \]
done
clear
B)
\[\frac{\upsilon }{2}\]
done
clear
C)
\[\frac{\upsilon }{\sqrt{2}}\]
done
clear
D)
\[\frac{\upsilon }{\sqrt{2}}\]
done
clear
View Answer play_arrow
Two vectors\[\vec{A}\]and\[\vec{B}\] are such that \[|\vec{A}+\vec{B}|=|\vec{A}-\vec{B}|.\] Then angle between the vectors A and B is
A)
\[0{}^\circ \]
done
clear
B)
\[60{}^\circ \]
done
clear
C)
\[90{}^\circ \]
done
clear
D)
\[180{}^\circ \]
done
clear
View Answer play_arrow
A charge q is placed at the centre of the joining the equal charges Q. The system of three charges will be in equilibrium if q is equal to
A)
\[\frac{-Q}{2}\]
done
clear
B)
\[\frac{-Q}{4}\]
done
clear
C)
\[-4Q\]
done
clear
D)
\[\frac{+Q}{2}\]
done
clear
View Answer play_arrow
In the figure emf of the cell is 2 V and internal resistance is negligible. The resistance of the voltmeter is 80 ohm. The reading of voltmeter will be
A)
2.00 volt
done
clear
B)
1.33 volt
done
clear
C)
1.60 volt
done
clear
D)
0.80
done
clear
View Answer play_arrow
The figure shows three similar lamps \[{{L}_{1}},{{L}_{2}},\]and \[{{L}_{3}}\]connected across a power supply. If the lamp \[{{L}_{3}}\]fuse, how will the light emitted by \[{{L}_{1}}\]and\[{{L}_{2}}\]charge?
A)
No charge
done
clear
B)
Brilliance of \[{{L}_{1}}\]decreases and that of \[{{L}_{2}}\]increases
done
clear
C)
Brilliance of both \[{{L}_{1}}\]and \[{{L}_{2}}\]increases
done
clear
D)
Brilliance of both \[{{L}_{1}}\]and \[{{L}_{2}}\]decreases
done
clear
View Answer play_arrow
Which of the following statements is correct about the circuit shown in the figure, where \[1\Omega \]and\[0.5\Omega \]are the internal resistances of the 6 V and 12 V batteries, respectively?
A)
The potential at point P is 6 V
done
clear
B)
The potential at point Q is +0.5 V
done
clear
C)
If a voltmeter is connected across the 6 V battery, it will read 7 V
done
clear
D)
If a voltmeter is connected across the 6 V battery, it will read 5 V
done
clear
View Answer play_arrow
A circular arc QTS is kept in an external magnetic field \[{{\vec{B}}_{0}}\]as shown in the figure. The arc carries a current L. The magnetic field is directed normal and into the page. The force acting on the arc is
A)
\[2I{{B}_{0}}R\hat{k}\]
done
clear
B)
\[I{{B}_{0}}R\hat{k}\]
done
clear
C)
\[-2I{{B}_{0}}R\hat{k}\]
done
clear
D)
\[-I{{B}_{0}}R\hat{k}\]
done
clear
View Answer play_arrow
An equilateral triangular loop is made up of uniform wire as shown in the figure. A current/enters through one of the vertices of triangle and exits from other vertices of the triangle of side 'a' as shown. The magnitude of magnetic field at the centre of the equilateral triangle loop due to itself is
A)
\[\frac{3{{\mu }_{0}}\ell }{2\pi a}\]
done
clear
B)
\[\frac{9{{\mu }_{0}}\ell }{2\pi a}\]
done
clear
C)
\[\frac{3\sqrt{3}{{\mu }_{0}}\ell }{2\pi a}\]
done
clear
D)
None of these
done
clear
View Answer play_arrow
The magnifying power of a telescope is 9. When it is adjusted for parallel rays the distance between the objective and eyepiece is 20 cm. The focal length of lenses are
A)
10 cm, 10 cm
done
clear
B)
15 cm, 5 cm
done
clear
C)
18 cm, 2 cm
done
clear
D)
11 cm, 9 cm
done
clear
View Answer play_arrow
When the electron of a hydrogen atom jumps from \[n=4\] to \[n=1\] state, the number of spectral lines emitted is
A)
9
done
clear
B)
3
done
clear
C)
6
done
clear
D)
15
done
clear
View Answer play_arrow
Consider the decomposition of \[{{N}_{2}}{{O}_{5}}\] as \[{{N}_{2}}{{O}_{5}}\to 2N{{O}_{2}}+\frac{1}{2}{{O}_{2}}\] Choose the correct option.
A)
\[4{{k}_{1}}=2k_{1}^{'}=k_{1}^{''}\]
done
clear
B)
\[4{{k}_{1}}=k_{1}^{'}=2k_{1}^{''}\]
done
clear
C)
\[{{k}_{1}}=2k_{1}^{'}=k_{1}^{''}\]
done
clear
D)
\[2{{k}_{1}}=2k_{1}^{'}=4k_{1}^{''}\]
done
clear
View Answer play_arrow
The logarithm of the equilibrium constant of the cell reaction corresponding to the cell \[X(s)|{{X}^{2+}}(aq)||{{Y}^{+}}(aq)|Y(s)\]with standard cell potential,\[E_{cell}^{o}=1.2\,V\] is given by
A)
40.2
done
clear
B)
47.2
done
clear
C)
12.5
done
clear
D)
21.5
done
clear
View Answer play_arrow
If the half-cell reactions are given as
(i)\[F{{e}^{2+}}+2e\to Fe(s);{{E}^{o}}=-0.44\,V.\] (ii)\[2{{H}^{+}}(aq)+\frac{1}{2}{{O}_{2}}(g)+2e\to {{H}_{2}}O(l);{{E}^{o}}=+1.23\,V.\]
The \[E{}^\circ \] for the reaction \[Fe\,(s)+2{{H}^{+}}+\frac{1}{2}{{O}_{2}}(g)\to F{{e}^{2+}}(aq)+{{H}_{2}}O(l)\]
A)
\[-0.79\,V\]
done
clear
B)
\[-1.67\,V\]
done
clear
C)
\[1.67\,V\]
done
clear
D)
\[0.79\,V\]
done
clear
View Answer play_arrow
The most adsorbed gas on activated charcoal is
A)
\[{{N}_{2}}\]
done
clear
B)
\[C{{O}_{2}}\]
done
clear
C)
\[C{{H}_{4}}\]
done
clear
D)
\[{{H}_{2}}\]
done
clear
View Answer play_arrow
Which of the following represents the arrangement in increasing order of bonds and bond dissociation energy?
A)
\[O_{2}^{2-}<O_{2}^{-}<{{O}_{2}}<O_{2}^{+}\]
done
clear
B)
\[O_{2}^{+}<O_{2}^{2-}<O_{2}^{-}<{{O}_{2}}\]
done
clear
C)
\[O_{2}^{2-}<O_{2}^{-}<O_{2}^{+}<{{O}_{2}}\]
done
clear
D)
\[{{O}_{2}}<O_{2}^{+}<O_{2}^{2-}<O_{2}^{-}\]
done
clear
View Answer play_arrow
The change of energy on freezing 1.00 kg of liquid water at \[0{}^\circ C\] and 1 atm is
A)
\[-333.4\,kJ\,k{{g}^{-1}}\]
done
clear
B)
\[-236.7\,kJ\,k{{g}^{-1}}\]
done
clear
C)
\[236.7\,kJ\,k{{g}^{-1}}\]
done
clear
D)
\[333.4\,kJ\,k{{g}^{-1}}\]
done
clear
View Answer play_arrow
\[0.1\,M\,NaCl\]and \[0.05\,M\,BaC{{l}_{2}}\] solutions are separated by a semi-permeable membrane in the container. For this system, choose the correct answer.
A)
Water flows from\[BaC{{l}_{2}}\]solution towards NaCl solution.
done
clear
B)
There is no movement of any solution across the membrane.
done
clear
C)
Osmotic pressure of 0.1 M NaCl is lower than the osmotic pressure of \[BaC{{l}_{2}}\](Assume complete dissociation).
done
clear
D)
Water flows from NaCl solution towards \[BaC{{l}_{2}}\]solution.
done
clear
View Answer play_arrow
If w is the amount of work done by the system and q is the amount of heat supplied to the system. Identify the type of the system.
A)
Open system
done
clear
B)
Isolated system
done
clear
C)
System with thermally conducing walls
done
clear
D)
Closed system
done
clear
View Answer play_arrow
the charge balance equation of species in 0.100 m acetic acid solution is given by
A)
\[[{{H}^{+}}]=[C{{H}_{3}}COO]\]
done
clear
B)
\[[{{H}^{+}}]=[O{{H}^{-}}]\]
done
clear
C)
\[2[{{H}^{+}}]=[OH]+[C{{H}_{3}}CO{{O}^{-}}]\]
done
clear
D)
\[[{{H}^{+}}]=[O{{H}^{-}}]+[C{{H}_{3}}CO{{O}^{-}}]\]
done
clear
View Answer play_arrow
The coordination number value in Hexagonal close packing is?
A)
4
done
clear
B)
6
done
clear
C)
8
done
clear
D)
12
done
clear
View Answer play_arrow
Four solutions of\[{{K}_{2}}S{{O}_{4}}\]with the following concentration 0.1 m, 0.01 m, 0.001 m and 0.0001 m are available. The maximum value of Van't Hoff factor i, corresponds to
A)
0.001 m solution
done
clear
B)
0.0001 m solution
done
clear
C)
0.1 m solution
done
clear
D)
0.01 m solution
done
clear
View Answer play_arrow
The pH of a solution prepared by mixing 2.0 ml of HCl solution of pH 3.0 and 3.0 ml of NaOH of pH 10.0 is
A)
3.5
done
clear
B)
2.5
done
clear
C)
6.5
done
clear
D)
5.5
done
clear
View Answer play_arrow
Find the following sets of quantum numbers the represents the highest energy of an atom.
A)
\[n=3,\,l=2,\,m=1,\,s=+\frac{1}{2}\]
done
clear
B)
\[n=4,\,l=0,\,m=0,\,s=+\frac{1}{2}\]
done
clear
C)
\[n=3,\,l=0,\,m=0,\,s=+\frac{1}{2}\]
done
clear
D)
\[n=3,\,l=1,\,m=1,\,s=+\frac{1}{2}\]
done
clear
View Answer play_arrow
Which of the following sets of quantum numbers represents the 19th electron in chromium?\[[Z=24\,for\,Cr]\]
A)
\[4,1,-1,\frac{1}{2}\]
done
clear
B)
\[4,0,0,\frac{1}{2}\]
done
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C)
\[3,2,-2,\frac{1}{2}\]
done
clear
D)
\[3,\,2,\,2,\frac{1}{2}\]
done
clear
View Answer play_arrow
The number of molecules in 100 ml of\[0.02\,N{{H}_{2}}S{{O}_{4}}\]is
A)
\[6.02\times {{10}^{20}}\]
done
clear
B)
\[6.02\times {{10}^{16}}\]
done
clear
C)
\[6.02\times {{10}^{22}}\]
done
clear
D)
\[6.02\times {{10}^{21}}\]
done
clear
View Answer play_arrow
During the conversion of\[N{{H}_{2}}O\to {{N}_{2}}O,\]the equivalent weight of \[N{{H}_{2}}OH\](molecular weight of \[N{{H}_{2}}OH\]is
A)
\[\frac{M}{4}\]
done
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B)
\[\frac{M}{5}\]
done
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C)
\[\frac{M}{2}\]
done
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D)
M
done
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View Answer play_arrow
The number of\[\beta -\]particles emitted during the transformation of \[_{y}^{x}A\]to \[_{n}^{m}B.\]
A)
\[n+\frac{x-m}{2}+y\]
done
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B)
\[\frac{x-m}{4}\]
done
clear
C)
\[2y-n+x-m\]
done
clear
D)
\[n+\frac{x-m}{4}-y\]
done
clear
View Answer play_arrow
In the disintegration process \[A\xrightarrow{\alpha }B\xrightarrow{-\beta }C\xrightarrow{-\beta }D\] The correct statement is
A)
A and C are isotones
done
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B)
A and B are isobars
done
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C)
A and D are isotopes
done
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D)
A and B are isotopes
done
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View Answer play_arrow
Which of the following compounds shows both Frenkel and Schottky defects?
A)
AgCl
done
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B)
NaCl
done
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C)
KCl
done
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D)
AgBr
done
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View Answer play_arrow
The pH of a solution obtained by mixing equal volumes\[\frac{N}{10}NaOH\] and \[\frac{N}{20}\,HCl\]is?
A)
12.4
done
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B)
1.6
done
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C)
2.2
done
clear
D)
13.4
done
clear
View Answer play_arrow
For the reaction \[AB\,(g)A(g)+B(g).AB\]AB is 33% dissociated at a total pressure of P. Therefore P is related to\[{{K}_{p}}\]by one of the following options
A)
\[P=3{{K}_{p}}\]
done
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B)
\[P={{K}_{p}}\]
done
clear
C)
\[P=8{{K}_{p}}\]
done
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D)
\[P=4{{K}_{p}}\]
done
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View Answer play_arrow
The strongest Lewis acid among boron halides is
A)
\[B{{I}_{3}}\]
done
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B)
\[BC{{l}_{3}}\]
done
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C)
\[B{{F}_{3}}\]
done
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D)
\[BB{{r}_{3}}\]
done
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View Answer play_arrow
The correct order of increasing hydration energy of the following conjugate bases of oxoacids of chlorine is
A)
\[Cl{{O}_{4}}^{-}<Cl{{O}_{3}}^{-}<Cl{{O}_{2}}^{-}<Cl{{O}^{-}}\]
done
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B)
\[Cl{{O}^{-}}<Cl{{O}_{2}}^{-}<Cl{{O}_{3}}^{-}<Cl{{O}_{4}}^{-}\]
done
clear
C)
\[Cl{{O}_{3}}^{-}<Cl{{O}_{4}}^{-}<Cl{{O}_{2}}^{-}<Cl{{O}^{-}}\]
done
clear
D)
\[Cl{{O}_{4}}^{-}<Cl{{O}_{3}}^{-}<Cl{{O}^{-}}<Cl{{O}_{2}}^{-}\]
done
clear
View Answer play_arrow
A solid is formed by two elements P and Q The element Q forms cubic close packing and the atoms of P occupy one third of the tetrahedral voids The formula of the compound is
A)
\[{{P}_{3}}Q\]
done
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B)
\[{{P}_{2}}{{Q}_{3}}\]
done
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C)
\[{{P}_{3}}{{Q}_{2}}\]
done
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D)
\[P{{Q}_{3}}\]
done
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View Answer play_arrow
The compound exhibiting maximum value of equivalent conductance in a fused state is
A)
\[SrC{{l}_{2}}\]
done
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B)
\[MgC{{l}_{2}}\]
done
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C)
\[BeC{{l}_{2}}\]
done
clear
D)
\[CaC{{l}_{2}}\]
done
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View Answer play_arrow
Which of the following have been arranged in decreasing order of oxidation number of sulphur?
A)
\[{{H}_{2}}S{{O}_{4}}>S{{O}_{2}}>{{H}_{2}}S>{{H}_{2}}{{S}_{2}}{{O}_{8}}\]
done
clear
B)
\[N{{a}_{2}}{{S}_{4}}{{O}_{6}}>{{H}_{2}}{{S}_{2}}{{O}_{7}}>N{{a}_{2}}{{S}_{2}}{{O}_{3}}>{{S}_{8}}\]
done
clear
C)
\[{{H}_{2}}S{{O}_{5}}>{{H}_{2}}S{{O}_{3}}>SC{{l}_{2}}>{{H}_{2}}S\]
done
clear
D)
\[S{{O}_{2}}^{2+}>S{{O}_{4}}^{2-}>S{{O}_{3}}^{2-}>HS{{O}_{4}}^{-}\]
done
clear
View Answer play_arrow
Thermodynamically the most stable form of carbon is
A)
Graphite
done
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B)
Fullerenes
done
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C)
Coal
done
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D)
Diamond
done
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View Answer play_arrow
The estimation of available chlorine in bleaching powder is done by
A)
Permanganometric titration
done
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B)
Acid base titration
done
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C)
Iodometric titration
done
clear
D)
Iodimetric titration
done
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View Answer play_arrow
The degree of hardness of water is usually expressed in terms of
A)
g/L of \[CaC{{O}_{3}}\]and\[MgC{{O}_{3}}\]present.
done
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B)
ppm by weight of\[MgS{{O}_{4}}.\]
done
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C)
ppm of\[CaC{{O}_{3}}\]actually present in water.
done
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D)
ppm by weight of\[CaC{{O}_{3}}\]irrespective of whether it is actually present.
done
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View Answer play_arrow
AgCl is dissolved in excess of each of \[\text{N}{{\text{H}}_{\text{3}}}\text{, KCN}\]and\[N{{a}_{2}}{{S}_{2}}{{O}_{3}}.\]The complex ions produced in each case are
A)
\[{{[Ag{{(N{{H}_{3}})}_{2}}]}^{2+}},{{[Ag{{(CN)}_{2}}]}^{3-}}\]and\[{{[Ag{{({{S}_{2}}{{O}_{3}})}_{2}}]}^{2-}}\]
done
clear
B)
\[{{[Ag{{(N{{H}_{3}})}_{2}}]}^{+}},{{[Ag{{(CN)}_{2}}]}^{3-}}\]and\[{{[Ag{{({{S}_{2}}{{O}_{3}})}_{2}}]}^{2-}}\]
done
clear
C)
\[{{[Ag{{(N{{H}_{3}})}_{2}}]}^{+}},{{[Ag{{(CN)}_{2}}]}^{-}}\]and\[{{[Ag{{({{S}_{2}}{{O}_{3}})}_{2}}]}^{3-}}\]
done
clear
D)
\[{{[Ag{{(N{{H}_{3}})}_{4}}]}^{2+}},{{[Ag{{(CN)}_{2}}]}^{3-}}\]and\[{{[A{{g}_{2}}{{({{S}_{2}}{{O}_{3}})}_{2}}]}^{2-}}\]
done
clear
View Answer play_arrow
The most stable complex among the following is
A)
\[[Fe{{(CO)}_{5}}]\]
done
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B)
\[{{[Pd{{(CN)}_{4}}]}^{4-}}\]
done
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C)
\[{{[Ni{{(CN)}_{4}}]}^{3-}}\]
done
clear
D)
\[{{[Ni{{(CN)}_{4}}]}^{4-}}\]
done
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View Answer play_arrow
The maximum number of P-H bonds is contained in which of the following molecules?
A)
\[{{H}_{3}}P{{O}_{3}}\]
done
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B)
\[{{H}_{3}}P{{O}_{2}}\]
done
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C)
\[{{H}_{4}}{{P}_{2}}{{O}_{7}}\]
done
clear
D)
\[{{H}_{3}}P{{O}_{4}}\]
done
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View Answer play_arrow
The bond order of the N-O bonds in \[N{{O}_{3}}^{-}\]ion is
A)
1.33
done
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B)
1.50
done
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C)
1.00
done
clear
D)
0.33
done
clear
View Answer play_arrow
Which of the following fluoride of xenon has zero dipole moment?
A)
\[Xe{{F}_{3}}\]
done
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B)
\[Xe{{F}_{4}}\]
done
clear
C)
\[Xe{{F}_{6}}\]
done
clear
D)
\[Xe{{F}_{2}}\]
done
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View Answer play_arrow
Choose the correct statement.
A)
Square planar complexes are more stable than octahedral complexes.
done
clear
B)
\[{{[CO{{(N{{H}_{3}})}_{6}}]}^{2+}}\] is oxidized to diamagnetic \[{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}}\] by the oxygen in air.
done
clear
C)
The\[{{[Cu{{(N{{H}_{3}})}_{4}}]}^{2+}}\] ion has a tetrahedral geometry and is diamagnetic.
done
clear
D)
\[{{[Fe{{(CN)}_{6}}]}^{3-}}\]is stable but\[{{[Fe{{F}_{6}}]}^{3-}}\] is unstable.
done
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View Answer play_arrow
The hydrolysis of\[NC{{l}_{3}}\]by water produces
A)
\[N{{H}_{2}}N{{H}_{2}}\]and\[HOCl\]
done
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B)
\[N{{H}_{2}}OH\]and\[HOCl\]
done
clear
C)
\[N{{H}_{2}}Cl\]and HOCl
done
clear
D)
\[N{{H}_{4}}OH\]and\[HOCl\]
done
clear
View Answer play_arrow
The solubilities of \[N{{a}_{2}}S{{O}_{4}},\text{ }BeS{{O}_{4}},\text{ }MgS{{O}_{4}}\]and\[BaS{{O}_{4}}\] will follow the order
A)
\[BeS{{O}_{4}}>Na2S{{O}_{4}}>MgS{{O}_{4}}>BaS{{O}_{4}}\]
done
clear
B)
\[BeS{{O}_{4}}>MgS{{O}_{4}}>N{{a}_{2}}S{{O}_{4}}>BaS{{O}_{4}}\]
done
clear
C)
\[N{{a}_{2}}S{{O}_{4}}>BeS{{O}_{4}}>MgS{{O}_{4}}>BaS{{O}_{4}}\]
done
clear
D)
\[MgS{{O}_{4}}>BeS{{O}_{4}}>N{{a}_{2}}S{{O}_{4}}>BaS{{O}_{4}}\]
done
clear
View Answer play_arrow
Among the following, the third ionization energy is highest for
A)
Aluminium
done
clear
B)
Beryllium
done
clear
C)
Boron
done
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D)
Magnesium
done
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View Answer play_arrow
The highest lattice energy corresponds to
A)
SrO
done
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B)
BaO
done
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C)
MgO
done
clear
D)
CaO
done
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View Answer play_arrow
Which of the following is an appropriate set of reactants for the preparation of 1 -methoxy-4-nitrobenzene?
[a] [b]
A)
A
done
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B)
B
done
clear
C)
Both [a] and [b]
done
clear
D)
None of these
done
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View Answer play_arrow
When subjected to acid catalysed hydration, the order of reactivity of the alkenes; \[{{(C{{H}_{3}})}_{2}}C=C{{H}_{2}}(I), C{{H}_{3}}CH=C{{H}_{2}}(II),\] and \[C{{H}_{2}}=C{{H}_{2}}\,(III)\] is
A)
I > III > II
done
clear
B)
III > II > I
done
clear
C)
II > I > III
done
clear
D)
I > II > III
done
clear
View Answer play_arrow
Name the reaction that used to bring about the following transformation; But-2-ene to ethanol.
A)
\[Cr{{O}_{2}}C{{l}_{2}}/{{H}_{3}}{{O}^{+}}\]
done
clear
B)
\[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\]in acidic medium
done
clear
C)
\[{{O}_{3}}/{{H}_{2}}O-Zn\]dust
done
clear
D)
PCC
done
clear
View Answer play_arrow
Arrange the following in increasing order of their basic strength:\[C{{H}_{3}}N{{H}_{2}}(I),{{(C{{H}_{3}})}_{2}}NH(II),\]\[{{(C{{H}_{3}})}_{3}}N\]\[(III),\,{{C}_{6}}{{H}_{5}}C{{H}_{2}}N{{H}_{2}}(IV)\]
A)
\[IV<III<I<II\]
done
clear
B)
\[IV<III<II<I\]
done
clear
C)
\[IV<III<II<I\]
done
clear
D)
\[I<II<III<IV\]
done
clear
View Answer play_arrow
Arrange the following in increasing order of their intermolecular forces: Nylon-6,6 (I), Buna-S (II), Polythene (III)
A)
I, II, III
done
clear
B)
II, III, I
done
clear
C)
II, I, III
done
clear
D)
III, II, I
done
clear
View Answer play_arrow
The\[p{{K}_{{{a}_{1}}}}\]and\[p{{K}_{{{a}_{2}}}}\]of an amino acid are 2.3 and 9.7 respectively. The isoelectric point of the amino acid is
A)
7.4
done
clear
B)
3.5
done
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C)
12.0
done
clear
D)
6.0
done
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View Answer play_arrow
The transfer RNA anticodon for the messenger RNA codon G-C-A is
A)
U-D-C
done
clear
B)
G-C-U
done
clear
C)
G-U-C
done
clear
D)
C-G-U
done
clear
View Answer play_arrow
In the following reaction,
The major product obtained is
A)
done
clear
B)
done
clear
C)
done
clear
D)
done
clear
View Answer play_arrow
Identify the product (E) in the following sequence of reactions.
A)
done
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B)
done
clear
C)
done
clear
D)
done
clear
View Answer play_arrow
Arrange the following compounds in increasing order of their reactivity in nucleophilic addition reactions. Ethanal (I), Propanal (II), Propanone (III), Butanone (IV).
A)
II < I < III < IV
done
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B)
III < II < I < IV
done
clear
C)
I < II < III < IV
done
clear
D)
IV < III < II < I
done
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View Answer play_arrow
Select the correct statement from the following options.
A)
Increase in substrate concentration, increases the velocity of enzymatic reaction at first then it reaches maximum ant further increment does not occur.
done
clear
B)
In competitive inhibition, the inhibitor closely resembles the substrate in its molecular structure.
done
clear
C)
Competitive inhibition are often used in the control of bacterial pathogens.
done
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D)
All of the above
done
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View Answer play_arrow
Ribosomes are the granular structure first observed under the electron microscope as dense particle by which scientist?
A)
Robert Brown (1831)
done
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B)
George Palade (1953)
done
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C)
Camillo Golgi (1898)
done
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D)
Singer and Nicolson (1972)
done
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View Answer play_arrow
Find out the total number of false statements given below.
[1] Cyanobacteria have chlorophyll 'a5 like green plants [2] Bacteria which oxidises various inorganic substance such as nitrates and ammonia and use the released energy for ATP production are chemo synthesis autotrophic bacteria. [3] Heterotrophic bacteria are less in abundance by nature. [4] Majority of heterotrophic bacteria are decomposers. [5] Chemosynthetic autotrophic bacteria play important role in recycling of nutrients like nitrogen, phosphrous iron and sulpur
A)
One
done
clear
B)
Two
done
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C)
Three
done
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D)
Four
done
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View Answer play_arrow
Micro-bodies which contain enzyme for \[\beta -\]oxidation of fatty acid and glyoxylate pathway.
A)
Sphaerosome
done
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B)
Peroxisomes
done
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C)
Glyoxysomes
done
clear
D)
Vacuole
done
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View Answer play_arrow
S-phase not characterised by
A)
DNA duplication
done
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B)
No increase in chromosome number
done
clear
C)
DNA replication
done
clear
D)
Duplication of centriole in the nucleus of eukaryotic animal cell.
done
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View Answer play_arrow
Which of the following biomolecules is common to respiration mediated breakdown of fats, carbohydrates and proteins?
A)
Fructose 1,6-bisphosphate
done
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B)
Pyruvic acid
done
clear
C)
Acetyl-CoA
done
clear
D)
Glucose 6-phosphate
done
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View Answer play_arrow
A few drops of sap were collected by cutting across a plant stem by a suitable method. The sap was tested chemically. Which one of the following test results indicates that it was phloem sap?
A)
Alkaline
done
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B)
Low refractive index
done
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C)
Absence of sugar
done
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D)
Acidic
done
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View Answer play_arrow
You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots?
A)
Auxin and cytokinin
done
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B)
Auxin and abscisic acid
done
clear
C)
Gibberellin and abscisic acid
done
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D)
IAA and gibberellin
done
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View Answer play_arrow
Enzyme nitrogenase is
A)
Mo - Fe protein
done
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B)
Mo - Mn protein
done
clear
C)
Mn - Fe protein
done
clear
D)
Cu - Fe protein
done
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View Answer play_arrow
Deficiency symptom of N, K and Mg appears in
A)
Young leaf
done
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B)
Meristematic tissue
done
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C)
Young stem
done
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D)
Senescent leaves
done
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View Answer play_arrow
Phosphorylation occurs in
A)
Mitochondria
done
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B)
Chloroplast
done
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C)
Cytoplasm
done
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D)
All of the above
done
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View Answer play_arrow
Find the incorrect statement?
A)
Large number of gametes is released in the surrounding water in external fertilisation.
done
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B)
Offspring produced by external fertilisation are extremely vulnerable to predators.
done
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C)
External fertilisation is shown by bony fishes and frogs.
done
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D)
In seed plant, the motile male gametes are carried to female gamete by pollen tube.
done
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View Answer play_arrow
Which one of the following generate new genetic combinations leading to variation?
A)
Parthenogenesis
done
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B)
Sexual reproduction
done
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C)
Nucellar polyembrony
done
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D)
Vegetative reproduction
done
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View Answer play_arrow
Replum occur in the ovary of
A)
Pea
done
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B)
Lemon
done
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C)
Mustard
done
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D)
Sunflower
done
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View Answer play_arrow
In majority of angiosperm.
A)
Pollen grains are shed at 2-celled stage.
done
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B)
There are numerous egg cells.
done
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C)
Antipodal cells have a filiform apparatus.
done
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D)
Nucellus is developed into embryo sac.
done
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View Answer play_arrow
Pollination in water hyacinth and water lily is brought about by the agency of
A)
Insects or wind
done
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B)
Birds
done
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C)
Bats
done
clear
D)
Water
done
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View Answer play_arrow
Male gametophyte in angiosperm is represented by
A)
Anther
done
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B)
Androecium
done
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C)
Microsporangium
done
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D)
Pollen grain
done
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View Answer play_arrow
The experiment which provides unequivocal proof that DNA is the genetic material came from the experiment of
A)
Watson and Crick
done
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B)
Wilkins and Franklin
done
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C)
Hershey and Chase
done
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D)
Avery, MacLeod and Maclyn McCarty
done
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View Answer play_arrow
The phenomenon of having an extra chromosome segment attached to its normal homologous chromo- some so that a gene or set of genes is represented twice in the same chromosome.
A)
Duplication
done
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B)
Crossing over
done
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C)
Translocation
done
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D)
Inversion
done
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View Answer play_arrow
In eukaryotes, RNA polymerase III is responsible for synthesis of
A)
28S RNA, 18S RNA and 5.8S RNA
done
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B)
tRNA, hnRNA, rRNA
done
clear
C)
tRNA, 5S RNA, snRNA
done
clear
D)
hnRNA, tRNA, rRNA
done
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View Answer play_arrow
A true breeding plant is
A)
Produced due to cross-pollination among unrelated plants.
done
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B)
Near homozygous and produces offspring of its own kind.
done
clear
C)
Always homozygous recessive in this genetic constitution,
done
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D)
One that is able to breed on its own.
done
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View Answer play_arrow
Satellite DNA is a useful tool in
A)
Organ transplantation
done
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B)
Sex determination
done
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C)
Forensic science
done
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D)
Genetic engineering
done
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View Answer play_arrow
Stirred-tank bioreactors have been designed for
A)
Addition of preservatives to the product.
done
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B)
Availability of oxygen throughout the process.
done
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C)
Ensuring anaerobic conditions in the culture vessel.
done
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D)
Purification of the product.
done
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View Answer play_arrow
An analysis of chromosomal DNA using the Southern hybridisation technique does not use
A)
Electrophoresis
done
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B)
Blotting
done
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C)
Autoradiography
done
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D)
PCR
done
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View Answer play_arrow
Which of the following is not a component of downstream processing?
A)
Purification
done
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B)
Preservation
done
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C)
Expression
done
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D)
Separation
done
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View Answer play_arrow
Following restriction enzymes produces blunt ends except.
A)
Alu I
done
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B)
Sma I
done
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C)
Sea I
done
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D)
Hind III
done
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View Answer play_arrow
Which GMO/transgenic animal are used in testing the safety of polio vaccine before they are used on human?
A)
Transgenic sheep
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B)
Transgenic cow
done
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C)
Transgenic viruses
done
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D)
Transgenic mice
done
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View Answer play_arrow
Diapause is
A)
Adaptation to terrestrial life.
done
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B)
Stage of suspended development seen in unfavourable conditions in many zooplankton species in lakes and ponds.
done
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C)
Method of migration from stressful habitat to a more hospitable area.
done
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D)
It is a type of Symbiosis.
done
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View Answer play_arrow
Orderly and sequential changes in communities, parallel with the changes in the physical environment is known as
A)
Ecological succession
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B)
Extinction
done
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C)
Divergent evolution
done
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D)
Convergent evolution
done
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View Answer play_arrow
Choose the correct statement:
A)
k-selection occurs in environment in which population densities fluctuate well below the carrying capacity.
done
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B)
k-selection occurs in environment in which individuals are likely to fall little competition.
done
clear
C)
r-selection tends to maximise the population size and operates in populations living at a density near the limit imposed by their resources.
done
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D)
k-selection is also known as density dependent selection.
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View Answer play_arrow
In which of the following interaction only one of the species benefited?
A)
Mutualism
done
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B)
Competition
done
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C)
Parasitism and Predation
done
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D)
Amensalism
done
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View Answer play_arrow
Hotspots of biodiversity are
A)
Areas of earth that contain many endemic species.
done
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B)
Species serves as proxy for entire communities in particular areas.
done
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C)
Species in particular niche.
done
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D)
Species diversity at particular area.
done
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Red data book or red list contains how many categories of species?
A)
6
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B)
5
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C)
7
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D)
8
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Potato spindle tuber disease is caused by
A)
Virus
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B)
Viroids
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C)
Lichens
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D)
Fungi
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Methanogens belong to
A)
Archaebacteria
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B)
Dinoflagellates
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C)
Slime moulds
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D)
Eubacteria
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Which of the following is correct about chrysophytes?
(I) Found in fresh and marine water (II) Microscopic plankton. (Ill) Cell walls are embedded with\[CaC{{O}_{3}}.\] (IV) Most of them are photo synthetic.
A)
I and III only
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B)
I, III and IV only
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C)
I, II and IV only
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D)
I and IV only
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Monographs contains information of
A)
Genus
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B)
Species
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C)
Family
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D)
Any one taxon
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Which of the following are correct for conifers?
(I) Needle like leaves to reduce surface area. (II) Thick cuticle on leaves. (Ill) Sunken stomata to reduce water loss. (IV) The main plant body is gametophyte.
A)
II and III
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B)
IV only
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C)
I only
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D)
II, I and III
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Which one of the following statement is wrong?
A)
Sargassum is popularly known as gulfweed.
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B)
Fucus and luminaria are rich source of Iodine.
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C)
Chlorella and spirulina are rich in protein.
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D)
Agar-Agar is obtained from luminaria focus and sargassum.
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The term 'tetradynamous' is related to
A)
Corolla
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B)
Calyx
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C)
Gynoecium
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D)
Androecium
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Select from the following the total number of plant having non-endospermic seed. Gram, Arhar, Moong, Sesbania, Lupin, Muliathi, Soyabean, Tomato, Brinjal, Belladona, Petunia, Tobacco, Tulip, Aloe, Colchicine, Asparagus, Chilli, Ground nuts, Indigofera, Sunhemp.
A)
10
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B)
15
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C)
20
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D)
6
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Bilateral symmetry is found in the flowers of
A)
Mustard
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B)
Chilli
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C)
Datura
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D)
Gulmohar
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Select the incorrect matching from the following table
A)
Ornamental Tulip, gloriosa, lupin, sweet Pea and petunia
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B)
Medicine Muliathi, belladonna and aloe
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C)
Fodder Sesbania and trifolium
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D)
Edible oil Soybean, groundnut and colchicine
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Cortex is the region found between
A)
Pericycle and endodermis
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B)
Endodermis and pith
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C)
Endodermis and vascular bundle
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D)
Epidermis and stele
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The balloon-shaped structures called tyloses
A)
Characterises the sapwood.
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B)
Are extensions of xylem paraenchyma cells into vessels.
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C)
Are linked to the ascent of sap through xylem vessels.
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D)
Originates in the lumen of vessels.
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Identify A, B and C in the below diagram.
A)
A: Interphase, B: Telophase, C: Anaphase
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B)
A: Anaphase, B: Telophase, C: Interphase
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C)
A: Telophase, B: Interphase, C: Anaphase
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D)
A: Interphase, B: Anaphase, C: Telophase
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Which hormones do stimulate the production of pancreatic juice and bicarbonate?
A)
Gastrin and insulin
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B)
Cholecystokinin and secretin
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C)
Insulin and glucagon
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D)
Angiotensin and epinephrine
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Partial pressure of \[C{{O}_{2}}\]is maximum in
A)
Alveolar air
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B)
Pulmonary vein
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C)
Pulmonary artery
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D)
Aorta
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Choose the correct statement.
A)
Meissner's corpuscles are thermoreceptors.
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B)
Photoreceptors in the human eye are depolarized during darkness and become hyperpolarised in response to the light stimulus.
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C)
Receptors do not produce graded potentials.
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D)
Nociceptors respond to changes in pressure.
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Gull's disease occurs due to
A)
Hypersecretion of thyroid gland
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B)
Hyposecretion of adrenal gland
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C)
Hypersecretion of adrenal gland
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D)
Hyposecretion of thyroid gland
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Name the ion released from sarcoplasmic reticulum when impulse travels from motor end plate over sarcolemma and then into the T-tubule and sarcoplasmic reticulum.
A)
Magnesium
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B)
Sodium
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C)
Potassium
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D)
Calcium
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Name the blood cells, whose maturation is stimulated by vitamin \[{{B}_{12}}\]and folic acid.
A)
Leucocytes
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B)
Neutrophils
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C)
Thrombocytes
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D)
Erythrocytes
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Stress hormone among the following is
A)
Glucagon
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B)
Secretion
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C)
Gastrin
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D)
Cortisol
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Which is an age related disorder characterised by decreased bone mass and increased chances of fractures. Decreased levels of estrogen are a common cause.
A)
Osteoporosis
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B)
Gout
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C)
Tetany
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D)
Muscular dystrophy
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Which of the following is a true statement about this diagram?
A)
This is the most abundant cell of blood.
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B)
This cell is phagocytic in nature.
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C)
Abundance in blood is 60 to 65 per cent.
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D)
This cell secretes histamine, serotonin and heparin.
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Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because
A)
There is a negative intrapleural pressure pulling at the lung walls.
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B)
There is a positive intrapleural pressure
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C)
Pressure in the lungs is higher than the atmospheric pressure.
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D)
There is a negative pressure in the lungs.
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A steroid hormone typically alters the activity of its target cells by
A)
Changing the membrane permeability of the cell.
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B)
Entering the cell and altering the gene expression.
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C)
Activation of \[I{{P}_{3}}.\]
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D)
Conversion of ATP to AMP
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View Answer play_arrow
The following nephron produces how much concentrated urine?
A)
4 times
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B)
5 times
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C)
3 times
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D)
2 times
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Which of the following is a hormone releasing IUD?
A)
Multiload 375
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B)
Lippes loop
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C)
CuT
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D)
LNG-20
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Consider the statements given below regarding contraception and answer as directed thereafter.
A)
Medical Termination of Pregnancy (MTP) during the first trimester is generally safe.
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B)
Generally chances of conception are nil until mother breast-feeds the infant upto two years.
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C)
Intrauterine devices like copper-T are effective contraceptives.
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D)
Contraception pills may be taken up to one week after coitus to prevent conception.
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A vasectomy
A)
Prevents the production of sperm in the testes.
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B)
Prevents the production of semen.
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C)
Prevents the movement of sperm into the urethra.
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D)
Prevents a man from having an erection.
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Which of the following depicts the correct pathway of transport of sperms?
A)
Rete testis\[\to \]Epididymis\[\to \]Efferent ductules\[\to \]Vas deferens
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B)
Rete testis\[\to \]Vas deferens\[\to \]Efferent ductules \[\to \] Epididymis
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C)
Efferent ductules \[\to \]Rete testis\[\to \]Vas deferens\[\to \] Epididymis
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D)
Rate Testis \[\to \] Efferent ductules\[\to \] Epididymis \[\to \]Vas deferens
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Match the Column I with Column II and select the correct option using the codes given below:
Column I
Column II
(A) Mons pubis
(i) Embryo formation
(B) Antrum
(ii) Sperm
(C) Trophectoderm
(iii) Female external genitalia
(D) Nebenkern
(iv) Graafian follicle
A)
A-(iii) B-(iv) C-(i) D-(ii)
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B)
A-(ii) B-(i) C-(iv) D-(ii)
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C)
A-(i) B-(iv) C-(iii) D-(ii)
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D)
A-(iii) B-(iv) C-(ii) D-(i)
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Which part of the sperm helps in into the ovum?
A)
Mitochondria
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B)
Acrosome
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C)
Tail
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D)
All of the above
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If a colour-blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour-blind is
A)
0.5
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B)
0.75
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C)
1
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D)
0
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Match the following concepts of evolution with List-I and List-II and select the correct answer using the codes given below the lists:
List-I
List-II
(A) Mutation
(1) Changes in population's allele frequencies due to chance alone.
(B) Gene flow
(2) Differences in survival and reproduction among variant individuals.
(C) Natural selection
(3) Immigration, emigration change allele frequencies.
(D) Genetic drift
(4) Source of new alleles.
A)
A-1, B-2, C-3, D-4
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B)
A-4, B-2, C-3, D-1
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C)
A-3, B-1, C-4, D-2
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D)
A-4, B-3, C-2, D-1
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Frequency of an autosomal lethal is 0.4. The frequency of carrier in a population of 200 individual is
A)
72
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B)
96
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C)
104
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D)
36
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What was the most significant trend in the evolution of modern man (Homo sapiens) from his ancestors?
A)
Shortening of jaws
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B)
Binocular vision
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C)
Increasing cranial capacity
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D)
Upright posture
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Which of the following is the correct sequence of events in the origin of life?
I. Formation of protobionts II. Synthesis of organic monomers III. Synthesis of organic polymers IV. Formation of DNA-based genetic systems
A)
I, III, II, IV
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B)
II, III, I, IV
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C)
II, III, IV, I
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D)
I, II, III, IV
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A molecule that can act as a genetic material must fulfil the traits given below, except
A)
It should be able to generate its replica.
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B)
It should be unstable structurally and chemically.
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C)
It should provide the scope for slow changes that are required for evolution.
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D)
It should be able to express itself in the form of Mendelian characters.
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Select the two statements out of the four (A to D) given below about lac operon.
(A) Glucose or galactose may bind with the repressor and inactivate it.
(B) In the absence of lactose, the represser binds with the operator region.
(C) The z-gene codes for permease.
(D) This was elucidated by Francois Jacob and Jacques Monod.
A)
(A), (C)
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B)
(B), (D)
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C)
(B), (C)
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D)
(A), (D)
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IARI, New Delhi released several vegetable crops that are rich in vitamins and minerals with respect to that select the correct matching.
Column-I
Column-II
(1) Vitamin A
(A) Carrot, spinach, pumpkin
(2) Vitamin C
(B) Bitter gourd, bathua, mustard, tomato ;
(3) Fe and Ca
(C) Spinach and bathua
(4) Protein
(D) Road bean, lablab, French and garden peas
A)
A-2, B-3, C-1, D-4
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B)
A-1, B-2, C-3, D-4
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C)
A-4, B-1, C-2, D-3
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D)
A-3, B-4, C-1, D-2
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Which of the following is correct regarding AIDS causative agent HIV?
A)
HIV is an enveloped virus that contains two identical molecules of single-stranded RNA and two molecules of reverse transcriptase.
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B)
HIV is a non-enveloped retrovirus.
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C)
HIV does not escape but attacks the acquired immune response.
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D)
HIV is an enveloped virus containing one molecule of single-stranded RNA and one molecule of reverse transcriptase.
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Among the following edible fishes, which one is a marine fish having rich source of omega-3 fatty acids?
A)
Mangur
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B)
Mrigala
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C)
Mackerel
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D)
Mystus
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'Swiss Cheese' bears large holes due to the production of \[C{{O}_{2}}\]by which microbe?
A)
Lacto bacillus
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B)
Saccharomyces cerevisiae
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C)
Propionibacterium shermanii
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D)
Aspergillus niger
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Biochemical Oxygen Demand (BOD) may not be a good index for pollution of water bodies receiving effluents from
A)
Dairy industry
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B)
Petroleum industry
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C)
Sugar industry
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D)
Domestic sewage
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Diapause is a stage of ____.
A)
Perpetual development
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B)
Intermittent development
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C)
Suspended development
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D)
Sequential development
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Exotic species having been introduced in India are
A)
Lantana camara,
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B)
Water Hyacinth Water Hyacinth,
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C)
Prosopis cineraria
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D)
Lantana camara, Ficus religiosa
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Nile Perch, Ficus religiosa Nearly _____ % of all insects are known to be phytophagous.
A)
25
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B)
35
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C)
45
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D)
10
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The Earth Summit (Historic Convention on Biological Diversity) was held in
A)
Johannesburg, South Africa, 2002
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B)
Rio de Janeiro, 1992
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C)
Kyoto, Japan
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D)
Montreal, Canada
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Eutrophication occurs because of
A)
Ca and Mg
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B)
Nitrogen and phosphorous
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C)
Carbon and oxygen
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D)
Hg and DDT
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Match the column
Column I
Column II
(A) Man
(1) Order - Carnivora
(B) Mango
(2) Family - Poaceae
(C) House fly
(3) Genus - Musca
(D) Tiger
(4) Phylum - Chordata
(E) Wheat
(5) Family - Anacardiaceae
A)
A-1, B-5, C-3, D-4, E-2
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B)
A-4, B-5, C-3, D-4, E-2
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C)
A-4, B-2, C-3, D-1, E-5
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D)
A-1, B-2, C-3, D-4, E-5
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Which of the following is incorrect about cartilaginous fish?
A)
Its teeth are modified placoid scales which an backwardly directed.
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B)
It has 5 to 7 pair of gills for respiration but without operculum (i.e., gill cover).
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C)
The air bladder is absent so that they have to swim constantly to avoid sinking.
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D)
In males, the pelvic fins claspers are absent.
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Find out the incorrect statement from the following
A)
Closely-related species differ in morphological features.
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B)
Genus comprises a group of related species.
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C)
Taxonomic studies are useful in agricultural, forestry and industries.
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D)
Notochord and ventral hollow neural system are common features of phylum chordata.
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View Answer play_arrow
Fat body of cockroach is functionally analogous to which organ of vertebrate
A)
Spleen
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B)
Liver
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C)
Kidney
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D)
Lungs
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Which of the following is the vasoconstrictor substance secreted by mast cells?
A)
Histamine
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B)
Heparin
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C)
Serotonin
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D)
Melatonin
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Between which of the following stages, the GTP is formed by substrate level phosphorylation?
A)
Succinate to fumarate
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B)
Ketoglutarate to succinate
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C)
Oxalosuccinate to glutarate
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D)
Fumarate to malate
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Which of the following is the least likely to be involved in stabilising the three-dimensional folding of most proteins?
A)
Electrostatic interaction
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B)
Hydrophobic interaction
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C)
Ester bonds
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D)
Hydrogen bonds
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View Answer play_arrow
Which of the following combinations is correct?
A)
Metal ions loosely attached with Apoenzyme Activators
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B)
Non-protein organic part attached tightly to Apoenzyme - Prosthetic group
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C)
Non protein organic part attached loosely to Apoenzyme - Coenzyme
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D)
All of the above
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View Answer play_arrow
When the cell has a stalled DNA replication fork which checkpoint should be predominantly activated?
A)
\[{{G}_{2}}/M\]
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B)
M
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C)
Both\[{{G}_{2}}/M\]and M
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D)
\[{{G}_{1}}/S\]
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View Answer play_arrow