The dimensions of \[{{({{\mu }_{0}}{{\varepsilon }_{0}})}^{-1/2}}\]are
A)
\[[{{L}^{-1}}T]\]
done
clear
B)
\[[L{{T}^{-1}}]\]
done
clear
C)
\[[{{L}^{-1/2}}{{T}^{1/2}}]\]
done
clear
D)
\[[{{L}^{1/2}}{{T}^{-1/2}}]\]
done
clear
View Answer play_arrow
A particle starts its motion from rest under the action of a constant force. If the distance covered in first 10 s is \[{{s}_{1}}\]and that covered in the first 20 s is \[{{s}_{2}},\]then
A)
\[{{s}_{2}}=2{{s}_{1}}\]
done
clear
B)
\[{{s}_{2}}=3{{s}_{1}}\]
done
clear
C)
\[{{s}_{2}}=4{{s}_{1}}\]
done
clear
D)
\[{{s}_{2}}={{s}_{1}}\]
done
clear
View Answer play_arrow
A particle covers half of its total distance with speed \[{{v}_{1}}\]and the rest half distance with speed \[{{v}_{2}}.\]Its average speed during the complete journey is
A)
\[\frac{{{v}_{1}}{{v}_{2}}}{{{v}_{1}}+{{v}_{2}}}\]
done
clear
B)
\[\frac{2{{v}_{1}}{{v}_{2}}}{{{v}_{1}}+{{v}_{2}}}\]
done
clear
C)
\[\frac{2v_{1}^{2}v_{2}^{2}}{v_{1}^{2}+v_{2}^{2}}\]
done
clear
D)
\[\frac{{{v}_{1}}+{{v}_{2}}}{2}\]
done
clear
View Answer play_arrow
\[\vec{A}\]and\[\vec{B}\]are two vectors and\[\theta \]is the angle between them, if\[\left| \vec{A}\times \vec{B} \right|=\sqrt{3}(\vec{A}.\vec{B})\] the value of \[\theta \]is:
A)
\[\text{60 }\!\!{}^\circ\!\!\text{ }\]
done
clear
B)
\[\text{45 }\!\!{}^\circ\!\!\text{ }\]
done
clear
C)
\[30{}^\circ \]
done
clear
D)
\[\text{90 }\!\!{}^\circ\!\!\text{ }\]
done
clear
View Answer play_arrow
The horizontal range and the maximum height of a projectile are equal. The angle of projection of the projectile is
A)
\[\theta ={{45}^{o}}\]
done
clear
B)
\[\theta ={{\tan }^{-1}}4\left( \frac{1}{4} \right)\]
done
clear
C)
\[\theta ={{\tan }^{-1}}(4)\]
done
clear
D)
\[\theta ={{\tan }^{-1}}(2)\]
done
clear
View Answer play_arrow
If vectors \[\vec{A}=\cos \omega \,\hat{i}+\sin \omega t\,\hat{j}\]and \[\vec{B}=\cos \frac{\omega t}{2}\hat{i}+\sin \frac{\omega t}{2}\hat{j}\] are functions of time, then the value of t at which they are orthogonal to each other is:
A)
\[t=0\]
done
clear
B)
\[t=\frac{\pi }{4\omega }\]
done
clear
C)
\[t=\frac{\pi }{2\omega }\]
done
clear
D)
\[t=\frac{\pi }{\omega }\]
done
clear
View Answer play_arrow
Sand is being dropped on a conveyor belt at the rate of M kg/s. The force necessary to keep the belt moving with a constant velocity of v m/s will be
A)
Mv newton
done
clear
B)
2 Mv newton
done
clear
C)
\[\frac{Mv}{2}\]newton
done
clear
D)
zero
done
clear
View Answer play_arrow
A conveyor belt is moving at a constant speed of 2 m/s. A box is gently dropped on it. The co- efficient of friction between them is\[\mu =0.5.\]The distance that the box will move relative to belt before coming to rest on it taking \[g=10\,m{{s}^{-2}}\]is:
A)
1.2 m
done
clear
B)
0.6 m
done
clear
C)
zero
done
clear
D)
0.4 m
done
clear
View Answer play_arrow
The force F acting on a particle of mass m is indicated by the force-time graph shown below. The change in momentum of the particle over the time interval from zero to 8 s is
A)
24 Ns
done
clear
B)
20 Ns
done
clear
C)
12Ns
done
clear
D)
6Ns
done
clear
View Answer play_arrow
A ball of mass 2 kg and another of mass 4 kg are dropped together from a 60 feet tall building. After a fall of 30 feet each towards earth, their respective kinetic energies will be in the ratio of
A)
\[\sqrt{2}:1\]
done
clear
B)
2 : 1
done
clear
C)
1 : 2
done
clear
D)
\[1:\sqrt{2}\]
done
clear
View Answer play_arrow
Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional forces are 10% of energy. How much power is generated by the turbine? \[(g=10\,m/{{s}^{2}})\]
A)
8.1 kW
done
clear
B)
10.2 kW
done
clear
C)
12.3 kW
done
clear
D)
7.0 kW
done
clear
View Answer play_arrow
The potential energy of a system increases if work is done
A)
by the system against a conservative force
done
clear
B)
by the system against a nonconservative force
done
clear
C)
upon the system by a conservative force
done
clear
D)
upon the system by a nonconservative force
done
clear
View Answer play_arrow
The upper half of an inclined plane of inclination \[\theta \]is perfectly smooth while lower half is rough. A block starting from rest at the top of the plane will again come to rest at the bottom, if the coefficient of friction between the block and lower half of the plane is given by
A)
\[\mu =\frac{1}{\tan \theta }\]
done
clear
B)
\[\mu =\frac{2}{\tan \theta }\]
done
clear
C)
\[\mu =2\tan \theta \]
done
clear
D)
\[\mu =\tan \theta \]
done
clear
View Answer play_arrow
A ball is thrown vertically downwards from a height of 20 m with an initial velocity\[v_{0}^{2}.\]It collides with the ground, loses 50 percent of its energy in collision and rebounds to the same height. The initial velocity \[{{v}_{0}}\]is: (Take\[g=10\,m{{s}^{-2}}\])
A)
\[~10\,m{{s}^{-1}}\]
done
clear
B)
\[~14\,m{{s}^{-1}}\]
done
clear
C)
\[~20\,m{{s}^{-1}}\]
done
clear
D)
\[~28\,m{{s}^{-1}}\]
done
clear
View Answer play_arrow
The moment of inertia of a uniform circular disc of radius R and mass M about an axis touching the disc at its diameter and normal to the disc is
A)
\[M{{R}^{2}}\]
done
clear
B)
\[\frac{2}{5}M{{R}^{2}}\]
done
clear
C)
\[\frac{3}{2}M{{R}^{2}}\]
done
clear
D)
\[\frac{1}{2}M{{R}^{2}}\]
done
clear
View Answer play_arrow
If\[\vec{F}\]is the force acting on a particle having position vector \[\vec{r}\]and \[\vec{\tau }\]be the torque of this force about the origin, then
A)
\[\vec{r}.\vec{\tau }\ne 0\]and\[\vec{F}.\vec{\tau }=0\]
done
clear
B)
\[\vec{r}.\vec{\tau }>0\]and\[\vec{F}.\vec{\tau }<0\]
done
clear
C)
\[\vec{r}.\vec{\tau }=0\]and\[\vec{F}.\vec{\tau }=0\]
done
clear
D)
\[\vec{r}.\vec{\tau }=0\]and\[\vec{F}.\vec{\tau }\ne 0\]
done
clear
View Answer play_arrow
The moment of inertia of a thin uniform rod of mass M and length L about an axis passing through its mid-point and perpendicular to its length is\[{{I}_{0}}.\]Its moment of inertia about an axis passing through one of its ends and perpendicular to its length is
A)
\[{{I}_{0}}+M{{L}^{2}}/4\]
done
clear
B)
\[{{I}_{0}}+2M{{L}^{2}}\]
done
clear
C)
\[{{I}_{0}}+M{{L}^{2}}\]
done
clear
D)
\[{{I}_{0}}+M{{L}^{2}}/2\]
done
clear
View Answer play_arrow
A solid cylinder of mass 3 kg is rolling on a horizontal surface with velocity \[4\,m{{s}^{-1}}.\] It collides with a horizontal spring of force constant \[200\,N{{m}^{-1}}.\]The maximum compression produced in the spring will be
A)
0.2 m
done
clear
B)
0.5 m
done
clear
C)
0.6 m
done
clear
D)
0.7 m
done
clear
View Answer play_arrow
A force \[\vec{F}=\alpha \hat{i}+3\hat{j}+6\hat{k}\]is acting at a point\[\vec{r}=2\hat{i}-6\hat{j}-12\hat{k}.\] The value of a for which angular momentum about origin is conserved is
A)
1
done
clear
B)
-1
done
clear
C)
2
done
clear
D)
zero
done
clear
View Answer play_arrow
The period of a satellite in a circular orbit of radius R is T, the period of another satellite in circular orbit of radius 4R is
A)
4T
done
clear
B)
T/4
done
clear
C)
8T
done
clear
D)
T/8
done
clear
View Answer play_arrow
Imagine a new planet having the same density as that of earth but it is 3 times bigger than the earth in size. If the acceleration due to gravity on the surface of earth is g and that on the surface of the new planet is g', then
A)
\[g'=3g\]
done
clear
B)
\[g'=\frac{g}{9}\]
done
clear
C)
\[g'=9g\]
done
clear
D)
\[g'=27g\]
done
clear
View Answer play_arrow
A particle of mass m is thrown upwards from the surface of the earth, with a velocity u. The mass and the radius of the earth are, respectively, M and R. G is gravitational constant and g is acceleration due to gravity on the surface of the earth. The minimum value of u so that the particle does not return back to earth is
A)
\[\sqrt{\frac{2GM}{R}}\]
done
clear
B)
\[\sqrt{\frac{2GM}{{{R}^{2}}}}\]
done
clear
C)
\[\sqrt{2g{{R}^{2}}}\]
done
clear
D)
\[\sqrt{\frac{4GM}{{{R}^{2}}}}\]
done
clear
View Answer play_arrow
Infinite number of bodies, each of mass 2 kg, are situated on x-axis at distance 1 m, 2 m, 4 m, 8 m, ..... respectively, from the origin. The resulting gravitational potential due to this system at the origin will be
A)
\[-G\]
done
clear
B)
\[-\frac{8}{3}G\]
done
clear
C)
\[-\frac{4}{3}G\]
done
clear
D)
\[-4G\]
done
clear
View Answer play_arrow
A remote-sensing satellite of earth revolves in a circular orbit at a height of \[0.25\times {{10}^{6}}\,m\]above the surface of earth. If earth's radius is \[6.38\times {{10}^{6}}\,m\]and \[g=9.8\,m{{s}^{-2}},\]then the orbital speed of the satellite is
A)
\[6.67\,km\,{{s}^{-1}}\]
done
clear
B)
\[7.76\,km\,{{s}^{-1}}\]
done
clear
C)
\[8.56\,km\,{{s}^{-1}}\]
done
clear
D)
\[9.13\,km\,{{s}^{-1}}\]
done
clear
View Answer play_arrow
Triple point of water is
A)
\[{{273.16}^{o}}F\]
done
clear
B)
\[273.16\,K\]
done
clear
C)
\[273.16{{\,}^{o}}C\]
done
clear
D)
\[273.16\,R\]
done
clear
View Answer play_arrow
If \[{{\lambda }_{m}}\]denotes the wavelength at which the radia-tive emission from a black body at a temperature is maximum, then
A)
\[{{\lambda }_{m}}\propto {{T}^{4}}\]
done
clear
B)
\[{{\lambda }_{m}}\]is independent
done
clear
C)
\[{{\lambda }_{m}}\propto T\]
done
clear
D)
\[{{\lambda }_{m}}\propto {{T}^{-1}}\]
done
clear
View Answer play_arrow
An electric kettle takes 4 A current at 220 V. How much time will it take to boil 1 kg of water from temperature\[\text{20 }\!\!{}^\circ\!\!\text{ C}\]? The temperature of boiling water is\[\text{100 }\!\!{}^\circ\!\!\text{ C}\].
A)
6.3 min
done
clear
B)
8.4 min
done
clear
C)
12.6 min
done
clear
D)
4.2 min
done
clear
View Answer play_arrow
The molar specific heats of an ideal gas at constant pressure and volume are denoted by\[{{C}_{p}}\] and \[{{C}_{\upsilon }}\]respectively. If\[\gamma =\frac{{{C}_{p}}}{{{C}_{\upsilon }}}\]and R is the universal gas constant, then \[{{C}_{\upsilon }}\]is equal to:
A)
\[\frac{1+\gamma }{1-\gamma }\]
done
clear
B)
\[\frac{R}{(\gamma -1)}\]
done
clear
C)
\[\frac{(\gamma -1)}{R}\]
done
clear
D)
\[\gamma R\]
done
clear
View Answer play_arrow
Which of the following processes is reversible?
A)
Transfer of heat by radiation
done
clear
B)
Electrical heating of a nichrome wire
done
clear
C)
Transfer of heat by conduction
done
clear
D)
Isothermal compression
done
clear
View Answer play_arrow
In thermodynamic processes which of the following statements is not true?
A)
In an adiabatic process the system is insulated from the surroundings
done
clear
B)
In an isochoric process pressure remains constant
done
clear
C)
In an isothermal process the temperature remains constant
done
clear
D)
In an adiabatic process\[p{{V}^{\gamma }}=\text{constant}\]
done
clear
View Answer play_arrow
A gas is taken through the cycled \[A\to B\to C\to A\] , as shown. What is the net work done by the gas?
A)
2000 J
done
clear
B)
1000 J
done
clear
C)
Zero
done
clear
D)
-2000 J
done
clear
View Answer play_arrow
One mole of an ideal diatomic gas undergoes a transition from A to B along a path AB as shown in the figure
The change in internal energy of the gas during the transition is
A)
20 kJ
done
clear
B)
-20 kJ
done
clear
C)
20 J
done
clear
D)
-12 kJ
done
clear
View Answer play_arrow
A mass m is suspended separately by two different springs of spring constant \[{{K}_{1}}\]and\[{{K}_{2}}\]gives the time period\[{{t}_{1}}\]and\[{{t}_{2}}\]respectively. If the same mass w is connected by both springs as shown in the figure, then time period t is given by the relation
A)
\[t={{t}_{1}}+{{t}_{2}}\]
done
clear
B)
\[t=\frac{{{t}_{1}}{{t}_{2}}}{{{t}_{1}}+{{t}_{2}}}\]
done
clear
C)
\[{{t}^{2}}=t_{1}^{2}+t_{2}^{2}\]
done
clear
D)
\[{{t}^{-2}}=t_{1}^{-2}+t_{2}^{-2}\]
done
clear
View Answer play_arrow
The resultant of two rectangular simple harmonic motions of the same frequency and unequal amplitudes but differing in phase by nil is
A)
Simple harmonic
done
clear
B)
Circular
done
clear
C)
Elliptical
done
clear
D)
Parabolic
done
clear
View Answer play_arrow
A simple pendulum performs simple harmonic motion about \[x=0\]with an amplitude a and time period T. The speed of the pendulum at \[x=a/2\]will be
A)
\[\frac{\pi a\sqrt{3}}{2T}\]
done
clear
B)
\[\frac{\pi a}{T}\]
done
clear
C)
\[\frac{3{{\pi }^{2}}a}{T}\]
done
clear
D)
\[\frac{\pi a\sqrt{3}}{T}\]
done
clear
View Answer play_arrow
When two displacements represented by \[{{y}_{1}}=a\sin (\omega t)\]and\[{{y}_{2}}=b\cos (\omega t)\]are superimposed the motion is
A)
Not a simple harmonic
done
clear
B)
Simple harmonic with amplitude \[\frac{a}{b}\]
done
clear
C)
Simple harmonic with amplitude\[\sqrt{{{a}^{2}}+{{b}^{2}}}\]
done
clear
D)
Simple harmonic with amplitude \[\frac{(a+b)}{2}\]
done
clear
View Answer play_arrow
A car is moving towards a high cliff. The car driver sounds a horn of frequency\[f\]The reflected sound heard by the driver has a frequency\[2f.\] If. If r be the velocity of sound, then the velocity of the car, in the same velocity units, will be:
A)
\[\frac{v}{\sqrt{2}}\]
done
clear
B)
\[\frac{V}{3}\]
done
clear
C)
\[\frac{V}{4}\]
done
clear
D)
\[\frac{V}{2}\]
done
clear
View Answer play_arrow
Each of the two strings of length 51.6 cm and 49.1 cm are tensioned separately by 20 N force. Mass per unit length of both the strings is the same and equal to \[1\,g{{m}^{-1}}.\]When both the strings vibrate simultaneously the number of beats is
A)
5
done
clear
B)
7
done
clear
C)
8
done
clear
D)
3
done
clear
View Answer play_arrow
Two sources of sound placed close to each other are emitting progressive waves given by \[{{y}_{1}}=4\,\sin 600\,\pi t\]and \[{{y}_{2}}=5\,\sin 608\,\pi t.\]An observer located near these two sources of sound will hear:
A)
4 beats per second with intensity ratio 81:1 between waxing and waning
done
clear
B)
4 beats per second with intensity ratio 25 : 16 between waxing and waning
done
clear
C)
8 beats per second with intensity ratio 25 : 16 between waxing and waning
done
clear
D)
8 beats per second with intensity ratio 81: 1 between waxing and waning
done
clear
View Answer play_arrow
The fundamental frequency of a closed organ pipe of length 20 cm is equal to the second overtone of an organ pipe open at both the ends. The length of organ pipe open at both the ends is
A)
80 cm
done
clear
B)
100 cm
done
clear
C)
120 cm
done
clear
D)
140 cm
done
clear
View Answer play_arrow
A charge Q is enclosed by a Gaussian spherical surface of radius R. If the radius is doubled, then the outward electric flux will
A)
be reduced to half
done
clear
B)
remain the same
done
clear
C)
be doubled
done
clear
D)
increase four times
done
clear
View Answer play_arrow
The electric potential at a point in free space due to a charge Q coulomb is \[Q\times {{10}^{11}}\]volts. The electric field at that point is
A)
\[4\pi {{\varepsilon }_{0}}Q\times {{10}^{22}}\,V/m\]
done
clear
B)
\[12\pi {{\varepsilon }_{0}}Q\times {{10}^{20}}\,V/m\]
done
clear
C)
\[4\pi {{\varepsilon }_{0}}Q\times {{10}^{20}}\,V/m\]
done
clear
D)
\[12\pi {{\varepsilon }_{0}}Q\times {{10}^{22}}\,V/m\]
done
clear
View Answer play_arrow
The potential energy of a particle in a force field is:\[U=\frac{A}{{{r}^{2}}}-\frac{B}{r},\] where A and B are positive constants and r is the distance of particle from the centre of the field. For stable equilibrium the distance of the particle is
A)
B/A
done
clear
B)
B/2A
done
clear
C)
2A/B
done
clear
D)
A/B
done
clear
View Answer play_arrow
If potential (in volts) in a region is expressed as \[V(x,y,z)=6xy-y+2yz,\]the electric field (in N/C) at point (1,1,0) is
A)
\[-\left( 6\hat{i}+9\hat{j}+\hat{k} \right)\]
done
clear
B)
\[-\left( 3\hat{i}+5\hat{j}+3\hat{k} \right)\]
done
clear
C)
\[-\left( 6\hat{i}+5\hat{j}+2\hat{k} \right)\]
done
clear
D)
\[-\left( 2\hat{i}+3\hat{j}+\hat{k} \right)\]
done
clear
View Answer play_arrow
To convert a 800 mV range milli voltmeter of resistance \[40\,\Omega \]into a galvanometer of 100 mA range, the resistance to be connected as shunt is
A)
\[10\,\Omega \]
done
clear
B)
\[20\,\Omega \]
done
clear
C)
\[30\,\Omega \]
done
clear
D)
\[40\,\Omega \]
done
clear
View Answer play_arrow
How many moles of lead (II) chloride will be formed from a reaction between 6.5 g of PbO and 3.2 g of HCl?
A)
0.333
done
clear
B)
0.011
done
clear
C)
0.029
done
clear
D)
0.044
done
clear
View Answer play_arrow
\[6.02\times {{10}^{20}}\]molecules of urea is present in 100 mL of its solution. The concentration of solution is
A)
0.01 M
done
clear
B)
0.001 M
done
clear
C)
0.1M
done
clear
D)
0.02 M
done
clear
View Answer play_arrow
If Avogadro number \[{{N}_{A}},\]is changed from \[6.022\times {{10}^{23}}\,mo{{l}^{-1}}\]to \[6.022\,\times {{10}^{23}}\,mo{{l}^{-1}},\] this would change:
A)
the ratio of chemical species to each other in a balanced equation
done
clear
B)
the ratio of elements to each other in a compound
done
clear
C)
the definition of mass in units of grams
done
clear
D)
the mass of one mole of grams
done
clear
View Answer play_arrow
A 0.66 kg ball is moving with a speed of 100 m/s. The associated wavelength will be
A)
\[6.6\times {{10}^{-32}}\,m\]
done
clear
B)
\[6.6\times {{10}^{-34}}\,m\]
done
clear
C)
\[1.0\times {{10}^{-35}}\,m\]
done
clear
D)
\[1.0\times {{10}^{-32}}\,m\]
done
clear
View Answer play_arrow
Calculate the energy in joule corresponding to light of wavelength 45 nm: (Planck's constant \[h=6.63\times {{10}^{-34}}\,Js;\]speed of light\[c=3\times {{10}^{8}}\,m{{s}^{-1}}\])
A)
\[6.67\times {{10}^{15}}\]
done
clear
B)
\[6.67\times {{10}^{11}}\]
done
clear
C)
\[4.42\times {{10}^{-15}}\]
done
clear
D)
\[4.42\times {{10}^{-18}}\]
done
clear
View Answer play_arrow
In which of the following bond angle is maximum?
A)
\[N{{H}_{3}}\]
done
clear
B)
\[NH_{4}^{+}\]
done
clear
C)
\[PC{{l}_{5}}\]
done
clear
D)
\[SC{{l}_{2}}\]
done
clear
View Answer play_arrow
In an octahedral structure, the pair of d orbitals involved in \[{{d}^{2}}s{{p}^{3}}\]hybridization is
A)
\[{{d}_{{{x}^{2-}}{{y}^{2}}}},{{d}_{{{z}^{2}}}}\]
done
clear
B)
\[{{d}_{xz}},{{d}_{{{x}^{2}}-{{y}^{2}}}}\]
done
clear
C)
\[{{d}_{{{z}^{2}}}},{{d}_{xz}}\]
done
clear
D)
\[{{d}_{xy}},{{d}_{yz}}\]
done
clear
View Answer play_arrow
Which is expected to show paramagnetism?
A)
\[Cl{{O}_{2}}\]
done
clear
B)
\[S{{O}_{2}}\]
done
clear
C)
\[C{{O}_{2}}\]
done
clear
D)
\[Si{{O}_{2}}\]
done
clear
View Answer play_arrow
The number of unpaired electrons in a para- magnetic diatomic molecule of an element with atomic number 16 is
A)
4
done
clear
B)
1
done
clear
C)
2
done
clear
D)
3
done
clear
View Answer play_arrow
The correct order of decreasing second ionisation enthalpy of Ti (22), V (23), Cr (24) and Mn (25)is
A)
V > Mn > Cr > Ti
done
clear
B)
Mn > Cr > Ti > V
done
clear
C)
Ti > V > Cr > Mn
done
clear
D)
Cr > Mn > V > Ti
done
clear
View Answer play_arrow
In which one of the following species, the central atom has the type of hybridization which is not the same as that present in other three?
A)
\[S{{F}_{4}}\]
done
clear
B)
\[I_{3}^{-}\]
done
clear
C)
\[SbCl_{5}^{2-}\]
done
clear
D)
\[PC{{l}_{5}}\]
done
clear
View Answer play_arrow
Some of the properties of the two species, \[NO_{3}^{-}\]and\[{{H}_{3}}{{O}^{+}}\]are described below. Which one of them is correct?
A)
Dissimilar in hybridization for the central atom with different structure
done
clear
B)
Isostructural with the same hybridization for the central atom
done
clear
C)
Isostructural with different hybridization for the central atom
done
clear
D)
Similar in hybridization for the central atom with different structure
done
clear
View Answer play_arrow
Which of the following species contains three bond pairs and one lone pan- around the central atom?
A)
\[NH_{2}^{-}\]
done
clear
B)
\[PC{{l}_{3}}\]
done
clear
C)
\[{{H}_{2}}O\]
done
clear
D)
\[B{{F}_{3}}\]
done
clear
View Answer play_arrow
Which of the following is paramagnetic?
A)
\[O_{2}^{-}\]
done
clear
B)
\[C{{N}^{-}}\]
done
clear
C)
\[N{{O}^{+}}\]
done
clear
D)
CO
done
clear
View Answer play_arrow
Which of the following species contains equal number of\[\sigma -\]and\[\pi -\]bonds?
A)
\[{{(CN)}_{2}}\]
done
clear
B)
\[C{{H}_{2}}{{(CN)}_{2}}\]
done
clear
C)
\[HCO_{3}^{-}\]
done
clear
D)
\[Xe{{O}_{4}}\]
done
clear
View Answer play_arrow
The pressure exerted by 6.0 g of methane gas ma \[0.03\,{{m}^{3}}\]vessel at \[129{}^\circ C\] is: (Atomic masses of C \[=12.01,\,H=1.01\]and\[R=8.314\,J{{K}^{-1}}mo{{l}^{-1}}\]
A)
215216 Pa
done
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B)
13409 Pa
done
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C)
41648 Pa
done
clear
D)
31684 Pa
done
clear
View Answer play_arrow
50 mL of each gas A and of gas B takes 150 and 200 seconds respectively for effusing through a pin hole under the similar condition. It molecular mass of gas B is 36, then the molecular mass of gas A will be
A)
96
done
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B)
128
done
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C)
32
done
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D)
64
done
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View Answer play_arrow
The unit of entropy is
A)
\[J{{K}^{-1}}\,mo{{l}^{-1}}\]
done
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B)
\[k{{J}^{-1}}mo{{l}^{-1}}\]
done
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C)
\[kJ\,mo{{l}^{-1}}\]
done
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D)
\[{{J}^{-1}}{{K}^{-1}}mo{{l}^{-1}}\]
done
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View Answer play_arrow
For the reaction, \[{{C}_{3}}{{H}_{8}}(g)+5{{O}_{2}}\xrightarrow{{}}3C{{O}_{2}}(g)+4{{H}_{2}}O(l)\] at constant temperature, \[\Delta H -\Delta U\] is
A)
\[+RT\]
done
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B)
\[-3RT\]
done
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C)
\[+3RT\]
done
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D)
\[-RT\]
done
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View Answer play_arrow
Identify the correct statement for change of Gibbs energy for a system\[(\Delta {{G}_{system}})\] at constant temperature and pressure:
A)
if \[\Delta {{G}_{system}}=0,\] the system is still moving in a particular direction
done
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B)
if\[\Delta {{G}_{system}}=-ve,\]not spontaneous
done
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C)
if \[\Delta {{G}_{system}}=+ve,\]the Process is spontaneous
done
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D)
if \[\Delta {{G}_{system}}=0,\]the system has attained equilibrium
done
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View Answer play_arrow
For the gas phase reaction, \[PC{{l}_{5}}(g)\rightleftharpoons PC{{l}_{3}}(g)+C{{l}_{2}}(g)\] Which of the following conditions are correct?
A)
\[\Delta H>0\]and \[\Delta S>0\]
done
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B)
\[\Delta H<0\]and\[\Delta S<0\]
done
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C)
\[\Delta H>0\]and\[\Delta S<0\]
done
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D)
\[\Delta H=0\]and\[\Delta S<0\]
done
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View Answer play_arrow
For vaporization of water at 1 atmospheric pressure, the values of\[\Delta H\]and\[\Delta S\]are \[40.63\text{ }kJ\text{ }mo{{l}^{-1}}\]\[\text{ }and\text{ }108.8\text{ }JK-1\text{ }mol-1,\] respectively The temperature when Gibbs energy change \[(\Delta G)\] for this transformation will be zero is
A)
273.4 K
done
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B)
393.4 K
done
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C)
373.4 K
done
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D)
293.4 K
done
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View Answer play_arrow
Which of the following statements is correct tor the spontaneous adsorption of a gas?
A)
\[\Delta S\]is negative and therefore\[\Delta H\]should be highly positive.
done
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B)
\[\Delta S\] is negative and therefore,\[\Delta H\]should be highly negative.
done
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C)
\[\Delta S\]is positive and therefore\[\Delta H\]should be negative.
done
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D)
\[\Delta S\]is positive and therefore \[\Delta H\]should also be highly positive.
done
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View Answer play_arrow
The dissociation constants for acetic acid and HCN at \[25{}^\circ C\] are\[1.5\times {{10}^{-5}}\]and \[4.5\times {{10}^{-10}},\] respectively. The equilibrium constant for the equilibrium. \[C{{N}^{-}}+C{{H}_{3}}COOH\rightleftharpoons HCN+C{{H}_{3}}CO{{O}^{-}}\]would be
A)
\[3.0\times {{10}^{5}}\]
done
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B)
\[3.0\times {{10}^{-5}}\]
done
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C)
\[3.0\times {{10}^{-4}}\]
done
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D)
\[3.0\times {{10}^{4}}\]
done
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View Answer play_arrow
Which of the following statements is correct for a reversible process in a state of equilibrium?
A)
\[\Delta {{G}^{o}}=-2.30\,RT\,\log \,K\]
done
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B)
\[\Delta {{G}^{o}}=-2.30\,RT\,\log \,K\]
done
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C)
\[\Delta G=-2.30\,RT\,\log \,K\]
done
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D)
\[\Delta G=2.30\,RT\,\log \,K\]
done
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View Answer play_arrow
Solution of \[0.1\,N\,N{{H}_{4}}OH\]and \[0.1\,N\,N{{H}_{4}}Cl\]has pH 9.25, then find out \[p{{K}_{b}}\]of \[N{{H}_{4}}OH.\]
A)
9.25
done
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B)
4.75
done
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C)
3.75
done
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D)
8.25
done
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View Answer play_arrow
Equimotar solutions of the following were prepared in water separately. Which one of the solutions will record the highest pH?
A)
\[BC{{l}_{2}}\]
done
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B)
\[MgC{{l}_{2}}\]
done
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C)
\[CaC{{l}_{2}}\]
done
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D)
\[SrC{{l}_{2}}\]
done
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View Answer play_arrow
Which of the following describes correct sequence for decreasing Lewis acid nature?
A)
\[BC{{l}_{3}}>B{{E}_{3}}>BB{{r}_{3}}\]
done
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B)
\[BB{{r}_{3}}>BC{{l}_{3}}>B{{F}_{3}}\]
done
clear
C)
\[BB{{r}_{3}}>B{{F}_{3}}>BC{{l}_{3}}\]
done
clear
D)
\[B{{F}_{3}}>BC{{l}_{3}}>BB{{r}_{3}}\]
done
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View Answer play_arrow
In which of the following arrangements the given sequence is not strict according to the property indicated against it?
A)
HF < HCl < HBr < HI: increasing acidic strength
done
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B)
\[{{H}_{2}}O<{{H}_{2}}S<{{H}_{2}}Se<{{H}_{2}}Te:\] increasing \[p{{K}_{a}}\] values
done
clear
C)
\[N{{H}_{3}}<\text{ }P{{H}_{3}}<\text{ }As{{H}_{3}}<\text{ }Sb{{H}_{3}}:\]increasing acidic character
done
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D)
\[C{{O}_{2}}<Si{{O}_{2}}<Sn{{O}_{2}}<Pb{{O}_{2}}:\]increasing oxidizing power.
done
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View Answer play_arrow
Which one of the following pairs of solution is not an acidic buffer?
A)
\[{{H}_{2}}C{{O}_{3}}\]and\[~N{{a}_{2}}C{{O}_{3}}\]
done
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B)
\[{{H}_{2}}P{{O}_{4}}\]and\[N{{a}_{3}}P{{O}_{4}}\]
done
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C)
\[HCl{{O}_{4}}\]and\[NaCl{{O}_{4}}\]
done
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D)
\[C{{H}_{3}}COOH\]and\[C{{H}_{3}}COONa\]
done
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View Answer play_arrow
Which of the following oxidation state is the most common among the lanthanoides?
A)
4
done
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B)
2
done
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C)
5
done
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D)
3
done
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View Answer play_arrow
The reaction of aqueous\[KMn{{O}_{4}}\]with\[{{H}_{2}}{{O}_{2}}\] acidic conditions gives
A)
\[M{{n}^{4+}}\]and\[{{O}_{2}}\]
done
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B)
\[M{{n}^{2+}}\]and\[{{O}_{2}}\]
done
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C)
\[M{{n}^{2+}}\]and\[{{O}_{3}}\]
done
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D)
\[M{{n}^{4+}}\]and\[Mn{{O}_{2}}\]
done
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View Answer play_arrow
Which of the following groups of ions makes the water hard?
A)
Sodium and bicarbonate
done
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B)
Magnesium and chloride
done
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C)
Potassium and sulphate
done
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D)
Ammonium and chloride
done
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View Answer play_arrow
Some statements about heavy water are given below:
(i) Heavy water is used as a moderator in nuclear reactors (ii) Heavy water is more associated than ordinary water. (iii) Heavy water is more effective solvent than ordinary water
Which of the above statements are correct?
A)
(i) and (ii)
done
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B)
(i), (ii) and (iii)
done
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C)
(ii) and (iii)
done
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D)
(i) and (iii)
done
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View Answer play_arrow
Which of the following compounds has the lowest melting point?
A)
\[Ca{{F}_{2}}\]
done
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B)
\[CaC{{l}_{2}}\]
done
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C)
\[~CaB{{r}_{2}},\]
done
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D)
\[Ca{{I}_{2}}\]
done
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View Answer play_arrow
In the hydrocarbon, \[\underset{6}{\mathop{C}}\,{{H}_{3}}-\underset{5}{\mathop{C}}\,H=\underset{4}{\mathop{C}}\,H-\underset{3}{\mathop{C}}\,{{H}_{2}}-\underset{2}{\mathop{C}}\,\equiv \underset{1}{\mathop{C}}\,H\] the state of hybridization of carbons 1, 3 and 5 are in the following sequence
A)
\[sp,s{{p}^{3}},s{{p}^{2}}\]
done
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B)
\[sp,s{{p}^{2}},s{{p}^{3}}\]
done
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C)
\[s{{p}^{3}},s{{p}^{2}},sp\]
done
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D)
\[s{{p}^{2}},sp,s{{p}^{3}}\]
done
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View Answer play_arrow
The structure of isobutyl group in an organic compound is
A)
\[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{2}}-C{{H}_{3}}\]
done
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B)
\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-\]
done
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C)
\[C{{H}_{3}}-\underset{C{{H}_{3}}}{\overset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,-\]
done
clear
D)
done
clear
View Answer play_arrow
The number of structure isomers possible from the molecular formula\[{{C}_{3}}{{H}_{9}}N\]is:
A)
2
done
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B)
3
done
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C)
4
done
clear
D)
5
done
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View Answer play_arrow
The product of the following reaction are \[C{{H}_{3}}C\equiv C\,.C{{H}_{2}}C{{H}_{3}}=\xrightarrow[(ii)Hydrolysis]{(i){{O}_{3}}}?\]
A)
\[C{{H}_{3}}COOH+C{{H}_{3}}COC{{H}_{3}}\]
done
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B)
\[C{{H}_{3}}COOH+C{{H}_{3}}C{{H}_{2}}COOH\]
done
clear
C)
\[C{{H}_{3}}CHO+C{{H}_{3}}C{{H}_{2}}CHO\]
done
clear
D)
\[C{{H}_{3}}COOH+C{{O}_{2}}\]
done
clear
View Answer play_arrow
In the following reaction, \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}Br\] \[\xrightarrow[2.{{H}_{3}}{{O}^{+}}]{1\,Mg.\,Ether}X,\]the product ?X? is
A)
\[{{C}_{6}}{{H}_{5}}C{{H}_{2}}C{{H}_{2}}{{C}_{6}}{{H}_{5}}\]
done
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B)
\[{{C}_{6}}{{H}_{5}}C{{H}_{2}}OC{{H}_{2}}{{C}_{6}}{{H}_{5}}\]
done
clear
C)
\[{{C}_{6}}{{H}_{5}}C{{H}_{2}}OH\]
done
clear
D)
\[{{C}_{6}}{{H}_{5}}C{{H}_{3}}\]
done
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View Answer play_arrow
If NaCl is dropped with \[{{10}^{-4}}\] mole % of \[SrC{{l}_{2}},\]the concentration of cation vacancies will be
A)
\[6.02\times {{10}^{6}}mo{{l}^{-1}}\]
done
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B)
\[6.02\times {{10}^{17}}mo{{l}^{-1}}\]
done
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C)
\[6.02\times {{10}^{14}}mo{{l}^{-1}}\]
done
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D)
\[6.02\times {{10}^{15}}mo{{l}^{-1}}\]
done
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View Answer play_arrow
The number of carbon atoms per unit cell of diamond unit cell is
A)
8
done
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B)
6
done
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C)
1
done
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D)
4
done
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View Answer play_arrow
The freezing point depression constant for water is \[-1.86{{\,}^{o}}C\,{{m}^{-1}}.\]If \[5.00\,g\,N{{a}_{2}}S{{O}_{4}}\]is dissolved in \[45.0\,g\,{{H}_{2}}O,\]the freezing point is changed by \[-3.82{{\,}^{o}}C,\] Calculate the van't Hoff factor for \[N{{a}_{2}}S{{O}_{4}}.\]
A)
0.381
done
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B)
2.63
done
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C)
2.05
done
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D)
3.11
done
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View Answer play_arrow
A hypothetical electrochemical cell is shown below\[\overset{O-}{\mathop{A}}\,|{{A}^{+}}(xM)||{{B}^{+}}(yM)|\overset{O-}{\mathop{B}}\,\]The emf measured is + 0.20 V. The cell reaction is
A)
The cell reaction cannot be predicted
done
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B)
\[A+{{B}^{+}}\xrightarrow{{}}{{A}^{+}}+B\]
done
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C)
\[{{A}^{+}}+B\xrightarrow{{}}A+{{B}^{+}}\]
done
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D)
\[{{A}^{+}}+{{e}^{-}}\xrightarrow{{}}A;{{B}^{+}}+{{e}^{-}}\xrightarrow{{}}B\]
done
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View Answer play_arrow
\[A{{l}_{2}}{{O}_{3}}\]is reduced by electrolysis at low potentials and high currents. If \[4.0\times {{10}^{4}}\]amperes of cur- rent is passed through molten \[A{{l}_{2}}{{O}_{3}}\]for 6 hours, what mass of aluminium is produced? (Assume 100% current efficiency. At mass of Al = 27g \[mo{{l}^{-1}}\])
A)
\[1.3\times {{10}^{4}}g\]
done
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B)
\[1.3\times {{10}^{4}}g\]
done
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C)
\[8.05\times {{10}^{4}}g\]
done
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D)
\[2.4\times {{10}^{5}}\,g\]
done
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View Answer play_arrow
Select the correct statement from the following:
A)
Mutations are random and directional
done
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B)
Darwinian variations are small and directionless
done
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C)
Fitness is the end result of the ability to adapt and gets selected by nature
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D)
All mammals except whales and camels have seven cervical vertebrae
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View Answer play_arrow
The hemoglobin human foetus:
A)
has only 2 protein subunits instead of 4
done
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B)
has a higher affinity for oxygen than that of an adult
done
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C)
has a lower affinity for oxygen than that of an adult
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D)
its affinity for oxygen is the same as that of an adult
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View Answer play_arrow
Which one of the following is considered important in the development of seed habit?
A)
Free-living gametophyte
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B)
Dependent sporophyte
done
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C)
Heterospory
done
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D)
Haplontic life cycle
done
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View Answer play_arrow
What is true for archaebacteria?
A)
All Halophiles
done
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B)
All photosynthetic
done
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C)
All fossils
done
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D)
Oldest living beings
done
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View Answer play_arrow
Which of the following secretes toxins during storage conditions of crop plants?
A)
Aspergillus
done
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B)
Pemcillium
done
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C)
Fusarium
done
clear
D)
Colletotrichum
done
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View Answer play_arrow
Some bacteria are able to grow in Streptomycin containing medium due to
A)
Natural selection
done
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B)
Induced mutation
done
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C)
Reproductive isolation
done
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D)
Genetic drift
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View Answer play_arrow
Which of the following is without exception in angiosperms?
A)
Presence of vessels
done
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B)
Double fertilisation
done
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C)
Secondary growth
done
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D)
Autotrophic nutrition
done
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View Answer play_arrow
Moss peat is used as a packing material for sending flowers and live plants to distant places because
A)
It is easily available
done
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B)
It is hygroscopic
done
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C)
It reduces transpiration
done
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D)
It serves as a disinfectant
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View Answer play_arrow
Which one of the following plants is monoecious?
A)
Papaya
done
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B)
Marchantia
done
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C)
Pinus
done
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D)
Cycas
done
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View Answer play_arrow
In which of the animal dimorphic nucleus is found:
A)
Amoeba proteus
done
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B)
Trypanosoma gambiense
done
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C)
Plasmodhim vivax
done
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D)
Paramecium caudatum
done
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View Answer play_arrow
From the following statements select the wrong one:
A)
Prawn has two pairs of antennae
done
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B)
Millipedes have two pairs of appendages in each segment of the body
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C)
Animals belonging to phylum Porifera are exclusively marine
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D)
Nematocysts are characteristic of the phylum cnidaria.
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View Answer play_arrow
Biradial symmetry and lack of cnidoblasts are the characteristics of:
A)
Starfish and sea anemone
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B)
Ctenoplana and Beroe
done
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C)
Aurelia and Paramecium
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D)
Hydra and starfish
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View Answer play_arrow
What is the eye of potato?
A)
Axillary bud
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B)
Accessory bud
done
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C)
Adventitious bud
done
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D)
Apical bud
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View Answer play_arrow
What type of placentation is seen in sweet pea?
A)
Basal
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B)
Axile
done
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C)
Free central
done
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D)
Marginal
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View Answer play_arrow
The floral formula
Is that of:
A)
Tobacco
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B)
Tulip
done
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C)
Soybean
done
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D)
Sunn hemp
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View Answer play_arrow
Vessels are found in:
A)
All angiosperms and some gymnosperm
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B)
Most of the angiosperm and few gymnosperms
done
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C)
All angiosperms, all gymnosperms and some pteridophyta
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D)
All pteridophyta
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View Answer play_arrow
For a critical study of secondary growth in plants, which one of the following pairs is suitable?
A)
Wheat and maiden hair fem
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B)
Sugarcane and sunflower
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C)
Teak and pine
done
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D)
Deodar and fem
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View Answer play_arrow
Palisade parenchyma is absent in the leaves of
A)
Gram
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B)
Sorghum
done
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C)
Mustard
done
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D)
Soybean
done
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View Answer play_arrow
Mast cells of connective tissue contain:
A)
Heparin and histamine
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B)
Heparin and calcitonin
done
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C)
Serotonin and melanin
done
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D)
Vasopressin and relaxin
done
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View Answer play_arrow
Mast cells secrete:
A)
Hippurin
done
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B)
Myoglobin
done
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C)
Histamine
done
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D)
Haemoglobin
done
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View Answer play_arrow
Which one of the following is correct pairing of a body part and like kind of muscle tissue that moves it?
A)
Iris - Involuntary smooth muscle
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B)
Heart wall - Involuntary unstriated muscle
done
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C)
Biceps of upper arm - smooth muscle fibres
done
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D)
Abdominal wall - smooth muscle
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View Answer play_arrow
In chloroplasts, chlorophyll is present in the:
A)
Inner membrane
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B)
Thylakoids
done
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C)
Stroma
done
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D)
Outer membrane
done
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View Answer play_arrow
The two subunits of ribosome remain united at a critical ion level of:
A)
Magnesium
done
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B)
Calcium
done
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C)
Copper
done
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D)
Manganese
done
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View Answer play_arrow
Middle lamella is composed mainly of:
A)
Phosphoglycerides
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B)
Hemicellulose
done
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C)
Muramic acid
done
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D)
Calcium pectate
done
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View Answer play_arrow
Which of the following is a reducing sugar?
A)
Galactose
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B)
Gluconic acid
done
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C)
\[\beta -\]methyl galactoside
done
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D)
Sucrose
done
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View Answer play_arrow
Carbohydrates, the most abundant biomolecules on earth, are produced by:
A)
Some bacteria, algae and green plant cells
done
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B)
All bacteria, fungi and algae
done
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C)
Fungi, algae and green plants cells
done
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D)
Viruses, fungi and bacteria
done
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View Answer play_arrow
A competitive inhibitor of succinic dehydrogenase is:
A)
\[\alpha \]ketoglutarate
done
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B)
malate
done
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C)
malonate
done
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D)
oxaloacetate
done
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View Answer play_arrow
At what stage of the cell cycle are histone proteins synthesized in a eukaryotic cell:
A)
During telophase
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B)
During S-phase
done
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C)
During G-2 stage of prophase
done
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D)
During entire prophase
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View Answer play_arrow
During gamete formation, the enzyme recom- binase participates during:
A)
Prophase I
done
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B)
Prophase II
done
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C)
Metaphase I
done
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D)
Anaphase II
done
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View Answer play_arrow
A somatic cell that has just completed the S phase of its cell cycle, as compared to gamete of the same species, has:
A)
four times the number of chromosomes and twice the amount of DNA
done
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B)
twice the number of chromosomes and twice the amount of DNA
done
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C)
same number of chromosomes but twice the amount of DNA
done
clear
D)
twice the number of chromosomes and four times the amount of DNA
done
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View Answer play_arrow
Which one of the following mineral elements plays an important role in biological nitrogen fixation?
A)
Copper
done
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B)
Manganese
done
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C)
Zinc
done
clear
D)
Molybdenum
done
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View Answer play_arrow
A plant requires magnesium for:
A)
Cell wall development
done
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B)
Holding cells together
done
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C)
Protein synthesis
done
clear
D)
Chlorophyll synthesis
done
clear
View Answer play_arrow
Manganese is required in:
A)
Chlorophyll synthesis
done
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B)
Nucleic acid synthesis
done
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C)
Plant cell wall formation
done
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D)
Photolysis of water during photosynthesis
done
clear
View Answer play_arrow
Nitrifying bacteria:
A)
reduce nitrates to free nitrogen
done
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B)
oxidize ammonia to nitrates
done
clear
C)
convert free nitrogen to nitrogen to com- pounds
done
clear
D)
convert proteins into ammonia
done
clear
View Answer play_arrow
The first stable product of fixation of atmospheric nitrogen in leguminous plants is:
A)
\[NO_{2}^{-}\]
done
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B)
Ammonia
done
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C)
\[NO_{3}^{-}\]
done
clear
D)
Glutamate
done
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View Answer play_arrow
Root pressure develops due to;
A)
Increase in transpiration
done
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B)
Active absorption
done
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C)
Low osmotic potential in soil
done
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D)
Passive absorption
done
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View Answer play_arrow
Which one of the following is wrong in relation to photorespiration?
A)
It occurs in chloroplasts
done
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B)
It occurs in daytime only
done
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C)
It is a characteristic of \[{{C}_{4}}\] plants
done
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D)
It is a characteristic of \[{{C}_{3}}\]plants
done
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View Answer play_arrow
In sugarcane plant \[^{14}C{{O}_{2}}\]is fixed in malic acid, in which the enzyme that fixes \[C{{O}_{2}}\]is:
A)
Ribulose biphosphate carboxylase
done
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B)
Phosphoenol pyruvic acid carboxylase
done
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C)
Ribulose phosphate kinase
done
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D)
Fructose phosphatase
done
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View Answer play_arrow
In photosystem I, the first electron acceptor is:
A)
Ferredoxin
done
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B)
Cytochrome
done
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C)
Plastocyanin
done
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D)
An iron sulphur protein
done
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View Answer play_arrow
The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that adenosine triphosphate (ATP) is formed because:
A)
A proton gradient forms across the inner membrane
done
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B)
There is a change in the permeability of the inner mitochondrial membrane toward adenosine diphosphate (ADP)
done
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C)
High energy bonds are formed in mitochondrial proteins
done
clear
D)
ADP is pumped out of the matrix into the intermembrane space
done
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In germinating seeds fatty acids are degraded exclusively in the:
A)
peroxisomes
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B)
mitochondria
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C)
proplastids
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D)
glyoxysomes
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The energy-releasing process in which the substrate is oxidized without an external electron acceptor is called:
A)
aerobic respiration
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B)
glycolysis
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C)
fermentation
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D)
photorespiration
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Anthesis is a phenomenon which refers to:
A)
Formation of pollen
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B)
Development of anther
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C)
Opening of flower bud
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D)
Reception of pollen by stigma
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Which one of the following acids is a derivative of carotenoids?
A)
Abscisic acid
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B)
Indole butyric acid
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C)
Indole-3-acetic acid
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D)
Gibberellic acid
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During seed germination its stored food is mobilized by:
A)
Ethylene
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B)
Cytokinin
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C)
ABA
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D)
Gibberellin
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The richest sources of vitamin B12 are:
A)
Chocolate and green gram
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B)
Rice and hen's egg
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C)
Carrot and chicken's breast
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D)
Goat's liver and spirulina
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When breastfeeding is replaced by less nutritive food low in proteins and calories, the infants be- low the age of one year are likely to suffer from:
A)
Pellagra
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B)
Marasmus
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C)
Rickets
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D)
Kwashiorkor
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If for some reason our goblet cells are nonfunctional, this will adversely affect:
A)
production of somatostatin
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B)
secretion of sebum from the sebaceous glands
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C)
maturation of sperms
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D)
smooth movement of food down the intestine
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Globulins contained in human blood plasma are primarily involved in;
A)
Clotting of blood
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B)
Defence mechanisms of body
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C)
Osmotic balance of body fluids
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D)
Oxygen transport in the blood
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Compared to blood our lymph has;
A)
More RBCs and less WBCs
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B)
No plasma
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C)
Plasma without proteins
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D)
More WBCs and no RBCs
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Which one of the following statements is correct regarding blood pressure?
A)
190/110 mm Hg may harm vital organs like brain and kidney
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B)
130/90 mm Hg is considered high and requires treatment
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C)
100/55 mm Hg is considered an ideal blood pressure
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D)
105/50 mm Hg makes one very active
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Person with blood group AB is considered as universal recipient because he has:
A)
both A and B antigens on RBC but no antibodies in the plasma
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B)
both A and B antibodies in the plasma
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C)
no antigen on RBC and no antibody in the plasma
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D)
both A and B antigens in the plasma but no antibodies
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Which one of the following is correct?
A)
Blood = Plasma + RBC + WBC + Platelets
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B)
Plasma = Blood - Lymphocytes
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C)
Serum = Blood + Fibrinogen
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D)
Lymph = Plasma + RBC + WBC
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Which one of the following animals has two separate circulatory pathways?
A)
Shark
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B)
Frog
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C)
Lizard
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D)
Whale
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The principal nitrogenous excretory compound in humans is synthesised:
A)
in kidneys but eliminated mostly through liver
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B)
in kidneys as well as eliminated by kidneys
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C)
in liver and also eliminated by the same through bile
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D)
in the liver, but eliminated mostly through kidneys
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A fall in glomerular filtration rate (GFR) activates:
A)
Adrenal cortex to release aldosterone
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B)
Adrenal medulla to release adrenaline
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C)
Posterior pituitary to release vasopressin
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D)
Juxtaglomerular cells to release rennin
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Which of the following causes an increase in sodium reabsorption in distal convoluted tubule?
A)
Increase in aldosterone levels
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B)
Decrease in antidiuretic hormone levels
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C)
Decrease in aldosterone levels
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D)
Decrease in antidiuretic hormone levels
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One of the examples of the action of the autonomous nervous system is:
A)
Knee-jerk response
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B)
Pupillary reflex
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C)
Peristalsis of the intestines
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D)
Swallowing of food
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Which one of the following pairs of structures distinguishes a nerve cell from other types of cell?
A)
Nucleus and mitochondria
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B)
Perikaryon and dendrites
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C)
Vacuoles and fibres
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D)
Flagellum and medullary sheath
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Bowman's glands are located in the
A)
Olfactory epithelium of our nose
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B)
Proximal end of uriniferous tubules
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C)
Anterior pituitary
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D)
Female reproductive system of cockroach be positive
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The nerve centres which control the body temperature and the urge for eating are contained in:
A)
Hypothalamus
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B)
Pons
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C)
Cerebellum
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D)
Thalamus
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Which part of the human ear plays no role in hearing as such but is otherwise very much required?
A)
Vestibular apparatus
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B)
Ear ossicles
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C)
Eustachian tube
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D)
Organ of corti
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Stimulation of a muscle fiber by a motor neuron occurs at:
A)
the neuromuscular junction
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B)
the transverse tubules
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C)
the myofibril
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D)
the sarcoplasmic reticulum
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Sertoli cells are regulated by the pituitary hormone known as
A)
FSH
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B)
GH
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C)
Prolactin
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D)
LH
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Chemically hormones are:
A)
Proteins, steroids and biogenic amines
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B)
Proteins only
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C)
Steroids only
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D)
Biogenic amines only
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Which one of the following pairs of organs includes only the endocrine glands?
A)
Thymus and testes
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B)
Adrenal and ovary
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C)
Parathyroid and adrenal
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D)
Pancreas and parathyroid
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Which one of the following is surrounded by a callose wall?
A)
Pollen grain
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B)
Microspore mother cell
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C)
Male gamete
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D)
Egg
done
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Dry indehiscent single-seeded fruit formed from bicarpellary, syncarpous, inferior ovary is:
A)
berry
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B)
cremocarp
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C)
caryopsis
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D)
cypsela
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An example of a seed with endosperm, perisperm and caruncle is:
A)
Castor
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B)
Cotton
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C)
Coffee
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D)
Lily
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Apomictic embryos in citrus arise from:
A)
Synergids
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B)
Maternal sporophytic tissue in ovule
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C)
Antipodal cells
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D)
Diploid egg
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In which one of the following pollination 1s autogamous?
A)
Cleistogamy
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B)
Geitonogamy
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C)
Xenogamy
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D)
Chasmogamy
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An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is:
A)
Lignin
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B)
Cellulose
done
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C)
Cuticle
done
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D)
Sporopollenin
done
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Which one of the following statements about morula in humans is correct?
A)
It has almost equal quantity of cytoplasm as an uncleaved zygote but much more DNA
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B)
It has far less cytoplasm as well as less DNA than in an uncleaved zygote
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C)
It has more or less equal quantity of cytoplasm and DNA as in uncleaved zygote
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D)
It has more cytoplasm and more DNA than an uncleaved zygote
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The signals for parturition originate from:
A)
placenta only
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B)
placenta as well as fully developed foetus
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C)
oxytocin released from maternal pituitary
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D)
fully developed foetus only
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In vitro fertilization is a technique that involves transfer of which one of the following into the fallopian tube?
A)
Embryo only, up to 8 cell stage
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B)
Either zygote or early embryo up to 8 cell stage
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C)
Embryo of 32 cell stage
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D)
Zygote only
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The linkage map of X-chromosome of fruit fly has 66 units, with yellow body gene (y) at one end and bobbed hair gene at the other end. The recombination frequency between these two genes (y and b) should be:
A)
60%
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B)
>50%
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C)
<50%
done
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D)
100%
done
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Which one of the following traits of garden pea studied by Mendel was a recessive feature?
A)
Axial flower position
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B)
Green seed colour
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C)
Green pod colour
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D)
Round seed shape
done
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A normal woman, whose father was colour blind is married to a normal man. The sons would be:
A)
50% colour blind
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B)
All normal
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C)
All colour blind
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D)
75% colour blind
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Lack of independent assortment of two genes A and B in fruit fly Drosophila is due to:
A)
Recombination
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B)
Linkage
done
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C)
Crossing over
done
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D)
Repulsion
done
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A woman with normal vision, but whose father was colour bind, marries a colour blind man. Suppose that the fourth child of this couple wasa boy. This boy:
A)
Must have normal colour vision
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B)
May be colour blind or may be normal vision
done
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C)
Will be partially colour blind since he is heterozygous for the colour blind mutant allele
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D)
Must be colour blind
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In order to find out the different types of gametes produced by a pea plants having the genotype AaBb, it should be crossed to a plant with the genotype:
A)
AaBb
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B)
aabb
done
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C)
AABB
done
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D)
aaBB
done
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Degeneration of a genetic code is attributed to the:
A)
First member of a codon
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B)
Second member of a codon
done
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C)
Entire codon
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D)
Third member of a codon
done
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During translation initiation in prokaryotes, a GTP molecule is needed in:
A)
Formation of formyl-met-tRNA
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B)
Binding of 30S subunit of ribosome with mRNA
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C)
Association of 30 S-mRNA with formyl-met-tRNA
done
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D)
Association of 50 S subunit of ribosome with initiation complex
done
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In transgenics expression of transgene in target tissue is determined by:
A)
Transgene
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B)
Promoter
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C)
Reporter
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D)
Enhancer
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Which of the following is correct order of the evolutionary history of man?
A)
Peking man. Homo sapiens, Neanderthal man, Cro-Magnon man
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B)
Peking man. Neanderthal man, Homo sapiens Cro-Magnon man
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C)
Peking man, Heidelberg man, Neanderthal man, Cro-Magnon man
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D)
Peking man. Neanderthal man. Homo sapiens, Heidelberg man
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Two different species cannot live for long duration in the same niche or habitat. This law is:
A)
Alien's law
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B)
Cause's law
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C)
Competitive exclusion principal
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D)
Weiseman's theory
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Darwin in his 'Natural Selection Theory' did not believe in any role of which one of the following in organic evolution:
A)
Parasites and predators as natural enemies
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B)
Survival of the fittest
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C)
Struggle for existence
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D)
Discontinuous variations
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Carcinoma refers to:
A)
Malignant tumours of the connective tissue
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B)
Malignant tumours of the skin or mucous membrane
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C)
Malignant tumours of the colon
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clear
D)
Benign tumours of the connective tissue
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Which one of the following depresses brain activity and produces feelings of calmness. relaxation and drowsiness?
A)
Morphine
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B)
Valium
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C)
Hashish
done
clear
D)
Amphetamines
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A person showing unpredictable moods, out- bursts of emotion, quarrelsome behavior and conflicts with others is suffering from
A)
Schizophrenia
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B)
Borderline Personality Disorder (BPD)
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C)
Mood disorders
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D)
Addictive disorders
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