A metal sphere is hung by a string fixed to a wall. The sphere is pushed away from the wall by a stick. The forces acting on the sphere are shown in the second diagram. Which of the following statements is wrong
A)
\[P=W\,tan\,\theta \]
done
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B)
\[\vec{T}+\vec{P}+\vec{W}=0\]
done
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C)
\[{{T}^{2}}={{P}^{2}}+{{W}^{2}}\]
done
clear
D)
\[T=P+W\]
done
clear
View Answer play_arrow
The length, breadth and thickness of a block are given by \[l = 12 cm,\,\,b = 6\,\,cm and t = 2.45 cm\]. The volume of the block according to the idea of significant figures should be
A)
\[1\times {{10}^{2}}\,c{{m}^{3}}\]
done
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B)
\[2\times {{10}^{2}}\,c{{m}^{3}}\]
done
clear
C)
\[1.763\times {{10}^{2}}\,c{{m}^{3}}\]
done
clear
D)
none of these
done
clear
View Answer play_arrow
Two trains one of length 100 m and another of length 125 m, are moving in mutually opposite directions along parallel lines, meet each other, each with speed 10 m/s. If their accelerations are \[0.3 m/{{s}^{2}}\,\,and\, 0.2 m/{{s}^{2}}\] respectively, then the time they take to pass each other will be
A)
5 s
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B)
10 s
done
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C)
15 s
done
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D)
20 s
done
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View Answer play_arrow
A particle is projected with a velocity \[\nu \] such that its range on the horizontal plane is twice the greatest height attained by it. The range of the projectile is (where g is acceleration due to gravity)
A)
\[\frac{4{{v}^{2}}}{5\,g}\]
done
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B)
\[\frac{4g}{5{{v}^{2}}}\]
done
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C)
\[\frac{{{v}^{2}}}{g}\]
done
clear
D)
\[\frac{4{{v}^{2}}}{\sqrt{5}\,g}\]
done
clear
View Answer play_arrow
A body of mass 10 kg slides along a rough horizontal surface. The coefficient of friction is\[1/\sqrt{3}\]. Taking \[g=10\,m/{{s}^{2}}\], the least force which acts at an angle of \[30{}^\circ \] to the horizontal is
A)
25 N
done
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B)
100 N
done
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C)
50 N
done
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D)
\[\frac{50}{\sqrt{3}\,}\,N\]
done
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View Answer play_arrow
A wooden block of mass M rests on a horizontal surface. A bullet of mass m moving in the horizontal direction strikes and gets embedded in it. The combined system covers a distance x on the surface. If the coefficient of friction between wood and the surface is \[\mu \], the speed of the bullet at the time of striking the block is (where m is mass of the bullet)
A)
\[\sqrt{\frac{2\,Mg}{\mu m}}\]
done
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B)
\[\sqrt{\frac{2\,\mu mg}{Mx}}\]
done
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C)
\[\sqrt{2\mu gx}\,\left( \frac{M+m}{m} \right)\]
done
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D)
\[\sqrt{\frac{2\mu mx}{M+m}}\]
done
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View Answer play_arrow
The mean radius of the earth's orbit round the sun is\[1.5 \times 1{{0}^{11}}\]. The mean radius of the orbit of mercury round the sun is\[6 \,\times \, 10 m\]. The mercury will rotate around the sun in
A)
a year
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B)
nearly 4 years
done
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C)
nearly 1/4 year
done
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D)
2.5 years
done
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View Answer play_arrow
A rectangular block of size \[10 cm \times 8 cm \times 5 cm\] is kept in three different positions P, Q and R in turn as shown in the figure. In each case, the shaded area is rigidly fixed and a definite force F is applied tangentially to the opposite face to deform the block. The displacement of the upper face will be
A)
same in all the three cases
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B)
maximum in P position
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C)
maximum in Q position
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D)
maximum in R position
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View Answer play_arrow
The figure shows a glass tube (linear coefficient of expansion is \[\alpha \] completely filled with a liquid of volume expansion coefficient\[\alpha \]. On heating length of the liquid column does not change. Choose the correct relation between \[\gamma \,\,and\,\,\alpha \]
A)
\[\gamma =\alpha \]
done
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B)
\[\gamma =2\alpha \]
done
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C)
\[\gamma =3\alpha \]
done
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D)
\[\gamma =\frac{\alpha }{3}\]
done
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View Answer play_arrow
Heat is supplied to a diatomic gas at constant pressure. The ratio of \[\Delta Q :\Delta U: \Delta W\] is
A)
\[5 : 3 : 2\]
done
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B)
\[5 : 2 : 3\]
done
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C)
\[7:5:2\]
done
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D)
\[7:2:5\]
done
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View Answer play_arrow
Two simple pendulums first of bob mass \[{{M}_{1}}\] and length \[{{L}_{1}}\] second of bob mass \[{{M}_{2}}\] and length \[{{L}_{2}}\] \[{{M}_{1}}={{M}_{2}}\,\,and\,\,{{L}_{1}}=2{{L}_{2}}\]. If the vibrational energy of both is same. Then which is correct?
A)
Amplitude of B greater than A
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B)
Amplitude of B smaller than A
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C)
Amplitudes will be same
done
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D)
None of these
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View Answer play_arrow
An engine approaches a hill with a constant speed. When it is at a distance of 0.9 km it blows a whistle, whose echo is heard by the driver after 5 s. If speed of sound in air is 330 m/s, the speed of engine is
A)
10 m/s
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B)
20 m/s
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C)
30 m/s
done
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D)
40 m/s
done
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View Answer play_arrow
In the following diagram, the charge and potential difference across \[8\,\mu F\,\] capacitance will be respectively
A)
\[320\,\mu \,C,\,\,40\,\,V\]
done
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B)
\[420\,\mu \,C,\,\,50\,\,V\]
done
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C)
\[214\,\mu \,C,\,\,27\,\,V\]
done
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D)
\[360\,\mu \,C,\,\,45\,\,V\]
done
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View Answer play_arrow
In the circuit shown in figure, find the current through the branch BD.
A)
5 A
done
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B)
0 A
done
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C)
3 A
done
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D)
4 A
done
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View Answer play_arrow
An electric kettle has two coils. When one of these is switched on, the water in the kettle boils in 6 min. When the other coil is switched on, the water boils in 3 min. If the two coils are connected in series, the time taken to boil the water in the kettle is
A)
3 min
done
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B)
6 min
done
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C)
2 min
done
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D)
9 min
done
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View Answer play_arrow
Three long straight wires are connected parallel to each other across a battery of negligible internal resistance. The ratios of their resistances are\[3\, :\, 4 \,:\, 5\]. What is the ratio of distances of middle wire from the others if the net force experienced by it is zero?
A)
\[4 : 3\]
done
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B)
\[3 : 1\]
done
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C)
\[5:3\]
done
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D)
\[2:3\]
done
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View Answer play_arrow
A magnetised wire of moment M is bent into an arc of a circle subtending an angle of \[60{}^\circ \] at the centre; then the new magnetic moment is
A)
\[\,\frac{2\,M}{\pi }\]
done
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B)
\[\,\frac{\,M}{\pi }\]
done
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C)
\[\frac{3\sqrt{3}\,M}{\pi }\]
done
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D)
\[\frac{3\,M}{\pi }\]
done
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View Answer play_arrow
A copper disc of radius 0.1 m rotates about its centre with 10 revolutions per second in a uniform magnetic field of 0.1 Tesla. The emf induced across the radius of the disc is
A)
\[\frac{\pi }{10}\,V\]
done
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B)
\[\frac{2\pi }{10}\,V\]
done
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C)
\[10\,\pi \,mV\]
done
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D)
\[20\,\pi \,mV\]
done
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View Answer play_arrow
A resistor R, an inductor L and a capacitor C are connected in series to an oscillator of frequency n. if the resonant frequency is \[{{n}_{r}}\] then the current lags behind voltage, when
A)
\[n=0\]
done
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B)
\[n<{{n}_{r}}\]
done
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C)
\[n<{{n}_{r}}\]
done
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D)
\[n>{{n}_{r}}\]
done
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View Answer play_arrow
Two large parallel plates are connected with the terminal of 100 V power supply. These plates have a fine hole at the centre. An electron having energy 200 eV is so directed that it passes through the holes. When it comes out its, de-Broglie wavelength is
A)
\[1.22\text{ }\overset{{}^\circ }{\mathop{A}}\,\]
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B)
\[1.75\text{ }\overset{{}^\circ }{\mathop{A}}\,\]
done
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C)
\[2\text{ }\overset{{}^\circ }{\mathop{A}}\,\]
done
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D)
None of these
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View Answer play_arrow
A hydrogen atom emits a photon corresponding to an electron transition from\[\operatorname{n}= 5 \,to\,\,n =1\]. The recoil speed of hydrogen atom is almost (\[mass\,\,of\,\,proton\,\,\approx \,\,1.6\,\,\times \,\,{{10}^{-27}}\,kg\]).
A)
\[10\,\,m{{s}^{-\,1}}\]
done
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B)
\[2\times {{10}^{-2}}\,m{{s}^{-}}^{1}\]
done
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C)
\[4\,m{{s}^{-1}}\]
done
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D)
\[8\,\,\times \,\,{{10}^{2}}\,m{{s}^{-1}}\]
done
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View Answer play_arrow
In semiconductor the concentrations of electrons and holes are \[8\,\,\times \,\,{{10}^{18}}/\,{{m}^{3}}\] and \[5\,\,\times \,\,{{10}^{18}}/\,m\] respectively. If the mobilities of electrons and hole are \[2.3\text{ }{{m}^{2}}/volt-sec\] and \[0.01\text{ }{{m}^{2}}/volt-sec\] respectively, then semiconductor is
A)
N-type and its resistivity is 0.34 ohm-metre
done
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B)
P-type and its resistivity is 0.034 ohm-metre
done
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C)
N-type and its resistivity is 0.034 ohm-metre
done
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D)
P-type and its resistivity is 3.40 ohm-metre
done
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View Answer play_arrow
PQR is a right angled prism with other angles as\[60{}^\circ \text{ }and\text{ }30{}^\circ \]. Refractive index of prism is 1.5. PQ has a thin layer of liquid. Light falls normally on the face PR. For total internal reflection, maximum refractive index of liquid is
A)
1.4
done
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B)
1.3
done
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C)
1.2
done
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D)
1.6
done
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View Answer play_arrow
The two coherent sources of equal intensity produce maximum intensity of 100 units at a point. If the intensity of one of the sources is reduced by \[36%\] by reducing its width then the intensity of light at the same point will be
A)
90
done
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B)
89
done
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C)
67
done
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D)
81
done
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View Answer play_arrow
A ball of mass m and radius r rolls inside a hemispherical shell of radius R. It is released from rest from point A as shown in figure. The angular velocity of centre of the ball in position B about the centre of the shell is
A)
\[2\sqrt{\frac{g}{5(R-r)}}\]
done
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B)
\[2\sqrt{\frac{g}{7(R-r)}}\]
done
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C)
\[\sqrt{\frac{2g}{5(R-r)}}\]
done
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D)
\[\sqrt{\frac{5g}{2(R-r)}}\]
done
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View Answer play_arrow
A horizontal turn table in the form of a disc of radius r carries a gun at G and rotates with angular velocity \[{{\omega }_{0}}\] about a vertical axis passing through the centre O. The increase in angular velocity of the system if the gum fires a bullet of mass m with a tangential velocity \[\nu \] with respect to the gum is (moment of inertia of gun + table about O is \[{{I}_{0}}\])
A)
\[\frac{m\nu r}{{{I}_{0}}+m{{r}^{2}}}\]
done
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B)
\[\frac{2m\nu r}{{{I}_{0}}}\]
done
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C)
\[\frac{\nu }{2r}\]
done
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D)
\[\frac{m\nu r}{2{{I}_{0}}}\]
done
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View Answer play_arrow
In the experiment, the curve between\[\Delta x\,\,and\,\,\Delta w\,\] is shown as dotted line (a). If we use an another wire of same material, but with double length and double radius. Which of the curve is expected.
A)
1
done
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B)
2
done
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C)
3
done
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D)
4
done
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View Answer play_arrow
A particle which is constrained to move along the x-axis, is subjected to a force in the same direction which varies with the distance x of the particle from the origin as \[\operatorname{F}\left( x \right)=-kx +a{{x}^{3}}.\] Here k and a are positive constants. For \[x\,\,\ge \,\,0\], the functional form of the potential energy \[{{U}_{(x)}}\] of the particle is
A)
done
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B)
done
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C)
done
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D)
(d)
done
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View Answer play_arrow
Half-life of a radioactive substance is 20 min. The time between \[20%\text{ }and\text{ }80%\] decay will be
A)
40 min
done
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B)
20 min
done
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C)
25 min
done
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D)
30 min
done
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View Answer play_arrow
There is a uniform electric field of strength \[{{10}^{3}}\,V/m\] along y-axis. A body of mass 1 g and charge \[{{10}^{6}}\,C\] is projected into the field from origin along the positive x-axis with a velocity 10 m/s. Its speed in m/s after 10 s is (neglect gravitation)
A)
10
done
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B)
\[5\sqrt{2}\,\]
done
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C)
\[10\sqrt{2}\,\]
done
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D)
20
done
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View Answer play_arrow
A toy car of mass 5 kg moves up a ramp under the influence of force F plotted against displacement x. The maximum height attained is given by
A)
\[{{y}_{\max }}\,=\,\,20\,m\]
done
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B)
\[{{y}_{\max }}\,=\,\,15\,m\]
done
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C)
\[{{y}_{\max }}\,=\,\,11\,m\]
done
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D)
\[{{y}_{\max }}\,=\,\,5\,m\]
done
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View Answer play_arrow
The path of a projectile in the absence of air drag is shown in the figure by dotted line. If the air resistance is not ignored then which one of the path shown in the figure is appropriate for the projectile?
A)
B
done
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B)
A
done
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C)
D
done
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D)
C
done
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View Answer play_arrow
The thermal conductivity of a material in CGS 4 system is 0.4. In steady state, the rate of flow of heat is \[10\text{ }cal/sec-c{{m}^{2}}\], then the thermal gradient will be
A)
\[10{}^\circ \,C/cm\]
done
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B)
\[12{}^\circ C/cm\]
done
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C)
\[25{}^\circ C/cm~\]
done
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D)
\[20{}^\circ C/cm\]
done
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View Answer play_arrow
A system is given 300 calories of heat and it 0 does 600 joules of work. How much does the internal energy of the system change in this process \[\left( J\,\,=\,\,4.18\,joules/cal \right)\]
A)
654 Joule
done
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B)
156.5 Joule
done
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C)
-300 Joule
done
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D)
-528.2 Joule
done
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View Answer play_arrow
The radius of a soap bubble is increased from\[\frac{1}{\sqrt{\pi }}\,cm\,\,to\,\,\frac{2}{\sqrt{\pi }}\,cm\] . If the surface tension of water is 30 dynes per cm, then the work done will be
A)
180 ergs
done
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B)
360 ergs
done
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C)
720 ergs
done
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D)
960 ergs
done
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View Answer play_arrow
The current through a 4.6 H inductor is shown in the following graph. The induced emf during the time interval \[\operatorname{t} \,=\, 5\] milli-sec to 6 milli-sec will be
A)
\[{{10}^{3}}\,V\]
done
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B)
\[-23\times {{10}^{3}}\,V\]
done
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C)
\[23\times {{10}^{3}}\,V\]
done
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D)
Zero
done
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View Answer play_arrow
A man with defective eyes cannot see distinctly object at the distance more than 60 cm from his eyes. The power of the lens to be used will be
A)
\[+60\text{ }D\]
done
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B)
\[-60\text{ }D\]
done
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C)
\[-1.66\text{ }D\]
done
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D)
\[\frac{1}{1.66}\text{ }D\]
done
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View Answer play_arrow
In Young's double slit experiment, if the slit widths are in the ratio \[1\,\,:\, 9\], then the ratio of the intensity at minima to that at maxima will be
A)
1
done
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B)
\[1/9\]
done
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C)
\[1/4\]
done
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D)
\[1/3\]
done
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View Answer play_arrow
\[A\,6\,\mu \,F\] capacitor is charged from 10 volts to 20 volts. Increase in energy will be
A)
\[18\,\,\times \,\,{{10}^{-4}}\,J\]
done
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B)
\[9\,\,\times \,\,{{10}^{-4}}\,J\]
done
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C)
\[4.5\,\,\times \,\,{{10}^{-4}}\,J\]
done
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D)
\[9\,\,\times \,\,{{10}^{-6}}\,J\]
done
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View Answer play_arrow
There is a current of 40 ampere in a wire of \[{{10}^{-6}}\,{{m}^{2}}\] area of cross-section. If the number of free electron per \[{{m}^{3}}\,is\text{ }{{10}^{29}}\], then the drift velocity will be
A)
\[1.25 \times 1{{0}^{3}}m/s\]
done
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B)
\[2.50 \times 1{{0}^{-}}^{3}m/s\]
done
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C)
\[25.0 \times 1{{0}^{-}}^{3}m/s\]
done
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D)
\[250 \times 1{{0}^{-}}^{3}m/s\]
done
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View Answer play_arrow
The density of material in CGS system of units is\[4\text{ }g/c{{m}^{3}}\]. In a system of units in which unit of lengths is 10 cm and unit of mass is 100 g, the value of density of material will be
A)
0.4
done
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B)
40
done
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C)
400
done
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D)
0.04
done
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View Answer play_arrow
A particle moving along x-axis has acceleration f, at time t, given by\[f={{f}_{0}}\left( 1-\frac{t}{T} \right)\], where \[{{f}_{0}}\] and T are constants. The particle at \[t=0\] has zero velocity. In the time interval between \[t=0\] and the instant when \[f=0\], the particle?s velocity \[\,({{\nu }_{x}})\] is:
A)
\[{{f}_{0}}T\]
done
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B)
\[\frac{1}{2}\,{{f}_{0}}{{T}^{2}}\]
done
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C)
\[{{f}_{0}}{{T}^{2}}\]
done
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D)
\[\frac{1}{2}{{f}_{0}}T\]
done
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View Answer play_arrow
A ball is dropped from a high rise platform at \[t\text{ }=0\] starting from rest. After 6 s another ball is thrown downwards from the same platform with a speed\[\nu \]. The two balls meet at\[\operatorname{t} =18 s\]. What is the value of\[\nu \]? \[\left( take\,\,g =10 m{{s}^{-}}^{2} \right)\]
A)
\[74\,\,m{{s}^{-}}^{2}\]
done
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B)
\[55\,\,m{{s}^{-}}^{1}\]
done
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C)
\[40\,\,m{{s}^{-}}^{1}\]
done
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D)
\[60\,\,m{{s}^{-}}^{1}\]
done
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View Answer play_arrow
The motion of a particle along a straight line is described by equation: \[\operatorname{x}= 8 +12t - {{t}^{3}}\] where x is in metre and t in second. The retardation of the particle when its velocity becomes zero is
A)
\[12\,\,m{{s}^{-2}}\]
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B)
\[24\,\,m{{s}^{-2}}\]
done
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C)
zero
done
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D)
\[6\,\,m{{s}^{-2}}\]
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View Answer play_arrow
For angles of projection of a projectile at angle \[\left( 45{}^\circ - \theta \right) and (45{}^\circ +\theta )\], the horizontal ranges described by the projectile are in the ratio of:
A)
\[1\, :\, 1\]
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B)
\[2\, :\, 3\]
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C)
\[1\, :\, 2\]
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D)
\[2\, :\, 1\]
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View Answer play_arrow
Which of the following is an example of ionic, crystal solid?
A)
Diamond
done
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B)
LiF
done
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C)
Li
done
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D)
Silicon
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View Answer play_arrow
Which one is an example of amorphous solid?
A)
Glass
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B)
Salt
done
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C)
Cesium chloride
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D)
Calcium fluoride
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View Answer play_arrow
The intensive property among these quantities is
A)
enthalpy
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B)
mass/volume
done
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C)
mass
done
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D)
volume
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View Answer play_arrow
Which of the following is true for an adiabatic process?
A)
\[\Delta H=0\]
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B)
\[\Delta W=0\]
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C)
\[\Delta Q=0\]
done
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D)
\[\Delta V=0\]
done
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View Answer play_arrow
The pressure P of a gas is plotted against its absolute temperature T for two different constant volumes,\[{{V}_{1}}\,\,and\,\,{{V}_{2}}\]. When \[{{V}_{1}}\,\,>\,\,{{V}_{2}}\] the
A)
curves have the same slope and do not intersect
done
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B)
curves must intersect at some point other than \[T=0\]
done
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C)
curve for \[{{V}_{2}}\] has a greater slope than that for \[{{V}_{1}}\]
done
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D)
curve for \[{{V}_{1}}\] has a greater slope than that for \[{{V}_{2}}\]
done
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View Answer play_arrow
In a closed flask of 5 litres, 1.0 g of \[{{H}_{2}}\] is heated from 300 to 600 K. which statement is not correct?
A)
Pressure of the gas increases
done
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B)
The rate of collision increases
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C)
The number of moles of gas increases
done
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D)
The energy of gaseous molecules increases
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View Answer play_arrow
Which is false?
A)
The greater the concentration of the substances involved in a reaction, the lower the speed of the reaction
done
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B)
The point of dynamic equilibrium is reached when the reaction rate in one direction just balances the reaction rate in the opposite direction
done
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C)
The dissociation of weak electrolyte is a reversible reaction
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D)
The presence of free ions facilitates chemical changes
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View Answer play_arrow
Chemical equations convey quantitative information on the
A)
type of atoms/molecules taking part in the reaction
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B)
number of atoms/molecules of the reactants and products involved in the reaction
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C)
relative number of moles of reactants and products involved in the reaction
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D)
quantity of reactant consumed and quantity of product formed
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View Answer play_arrow
The sulphate of a metal M contains \[9.87\,%\] of M. This sulphate is isomorphous with\[ZnS{{O}_{4}}\,\cdot \,7{{H}_{2}}O\]. The atomic weight of M is
A)
40.3
done
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B)
36.3
done
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C)
24.3
done
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D)
11.3
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View Answer play_arrow
When 100 ml of 1 M NaOH solution and 10 ml of 10 \[N{{H}_{2}}S{{O}_{4}}\] solution are mixed together, the resulting solution will be
A)
alkaline
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B)
acidic
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C)
strongly acidic
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D)
neutral
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View Answer play_arrow
The volume of oxygen liberated from 0.68 g of \[{{H}_{2}}{{O}_{2}}\] is
A)
112 ml
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B)
56 ml
done
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C)
224 ml
done
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D)
336 ml
done
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View Answer play_arrow
The mass of 1 mole of electron is
A)
\[9.1\,\,\times \,\,1{{0}^{-28}}\,g\]
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B)
1.008 mg
done
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C)
0.55 mg
done
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D)
\[9.1\,\,\times \,\,1{{0}^{-27}}\,g\]
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View Answer play_arrow
In the transition of Zn atoms to \[Z{{n}^{++}}\] ions there is a decrease in the
A)
number of valency electrons
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B)
atomic weight
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C)
atomic number
done
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D)
equivalent weight
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View Answer play_arrow
The molecular formula of chloride of a metal M is\[MC{{l}_{3}}\]. The formula of its carbonate would be
A)
\[MC{{O}_{3}}\]
done
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B)
\[{{M}_{2}}{{(C{{O}_{3}})}_{3}}\]
done
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C)
\[{{M}_{2}}C{{O}_{3}}\]
done
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D)
\[M{{(C{{O}_{3}})}_{2}}\]
done
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View Answer play_arrow
Which position for hydrogen explain all its properties?
A)
At the top of halogen
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B)
At the top of alkali metals
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C)
At the top of carbon family
done
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D)
None of these
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View Answer play_arrow
Hydrogen readily combines with non-metals and thus it shows its
A)
electronegativity character
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B)
electropositive character
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C)
both [a] and [b]
done
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D)
none of these
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View Answer play_arrow
Which of the following should be done in order to prepare 0.40 M \[NaCl\] starting with 100 ml of 0.30 M NaCl \[\left( mol.wt. of\,\,NaCl = 38.5 \right)\]?
A)
Add 0.585 g NaCl
done
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B)
Add 20 ml water
done
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C)
Add 0.001 ml NaCl
done
clear
D)
Evaporate 10 ml water
done
clear
View Answer play_arrow
The mole fraction of the solute in one molal aqueous solution is
A)
0.027
done
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B)
0.036
done
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C)
0.018
done
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D)
0.009
done
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View Answer play_arrow
In the reaction, \[4Fe+3{{O}_{2}}\,\to \,\,4F{{e}^{3+}}\,+\,\,6{{O}^{2-}}\] which of the following statement is incorrect?
A)
A redox reaction
done
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B)
Metallic iron is a reducing agent
done
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C)
\[F{{e}^{3+}}\] is an oxidising agent
done
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D)
Metallic iron is reduced to \[F{{e}^{3+}}\]
done
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View Answer play_arrow
Which of the following is redox reaction?
A)
\[{{H}_{2}}S{{O}_{4}}\,with\,\,NaOH\]
done
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B)
In atmosphere, \[{{O}_{3}}\,\,from\,\,{{O}_{2}}\] by lightning
done
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C)
Evaporation of \[{{H}_{2}}O\]
done
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D)
Nitrogen oxides form nitrogen and oxygen by lightning
done
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View Answer play_arrow
Which of the following does not contain number of neutrons equal to that of \[_{18}^{40}Ar\]?
A)
\[_{19}^{41}K\]
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B)
\[_{21}^{43}K\]
done
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C)
\[_{21}^{40}Sc\]
done
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D)
\[_{20}^{42}Ca\]
done
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View Answer play_arrow
An element \[_{96}{{X}^{227}}\] emits \[4\alpha \,\,and\,\,5\beta \] particles to form new element Y. Then atomic number and mass number of Y are
A)
93; 211
done
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B)
211; 93
done
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C)
212; 88
done
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D)
88; 211
done
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View Answer play_arrow
In the preparation of alkanes; a concentrated aqueous solution of sodium or potassium salts of saturated carboxylic acid are subjected to
A)
hydrolysis
done
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B)
oxidation
done
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C)
hydrogenation
done
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D)
electrolysis
done
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View Answer play_arrow
Propionic acid is subjected to reduction with hydroiodic acid in the presence of a little P, the product formed is
A)
ethane
done
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B)
propane
done
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C)
butane
done
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D)
none of these
done
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View Answer play_arrow
Fe, Co and Ni have valuable catalytic properties in process involving
A)
organic compound
done
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B)
oxidation
done
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C)
hydrogenation
done
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D)
compounds of hydrogen
done
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View Answer play_arrow
The valence shell electronic configuration of \[C{{l}^{2+}}\] ion is
A)
\[4s{}^\circ \,3{{d}^{4}}\]
done
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B)
\[4{{s}^{2}}\,3{{d}^{2}}\]
done
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C)
\[4{{s}^{2}}\,3{{d}^{0}}\]
done
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D)
\[4{{p}^{6}}\,4{{s}^{2}}\]
done
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View Answer play_arrow
Which one of the following material conducts electricity?
A)
Diamond
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B)
Crystalline sodium chloride
done
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C)
Barium sulphate
done
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D)
Fused potassium chloride
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View Answer play_arrow
Which of the following is not a non-electrolyte?
A)
Acetic acid
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B)
Glucose
done
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C)
Ethanol
done
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D)
Urea
done
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View Answer play_arrow
Which of the following is not an ore of magnesium?
A)
Magnesite
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B)
Dolomite
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C)
Gypsum
done
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D)
Camallite
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View Answer play_arrow
The equivalent weight of \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] in acidic medium
A)
294
done
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B)
49
done
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C)
298
done
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D)
50
done
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View Answer play_arrow
The equation for Freundlich adsorption isotherm,
A)
\[\frac{x}{m}=k{{p}^{1/n}}\]
done
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B)
\[x=mk{{p}^{1/n}}\]
done
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C)
\[x/m=k{{p}^{-n}}\]
done
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D)
All of these
done
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View Answer play_arrow
Activated charcoal is used to remove colouring matter from pure substances. It works by
A)
oxidation
done
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B)
reduction
done
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C)
bleaching
done
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D)
adsorption
done
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View Answer play_arrow
Given the molecular formula of the hexa coordinated complexes [A] \[CoC{{l}_{3}}.\,\,6N{{H}_{3}}\] [B] \[CoC{{l}_{3}}\,.\,5N{{H}_{3}}\] [C] \[CoC{{l}_{3}}\,.\,4N{{H}_{3}}\] If the number of coordinated \[N{{H}_{3}}\] molecules in A, B and C respectively are 6, 5 and 4, the primary valency B in [A], [B] and [C] are:
A)
6, 5, 4
done
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B)
3, 2, 1
done
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C)
0, 1, 2
done
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D)
3, 3, 3
done
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View Answer play_arrow
In \[{{K}_{4}}\left[ Fe\left( C{{N}_{6}} \right) \right]\], Fe is in the form of
A)
an atom
done
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B)
an ion
done
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C)
cationic complex
done
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D)
anionic complex
done
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View Answer play_arrow
If the atomic number of an element is 33, it will be placed in the periodic table in the
A)
first gp
done
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B)
third gp
done
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C)
fifth gp
done
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D)
seventh gp
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View Answer play_arrow
Dobereiner triads is
A)
Na, K, Rb
done
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B)
Mg, S, As
done
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C)
Cl, Br, I
done
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D)
P, S, As
done
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View Answer play_arrow
For the reaction \[2{{N}_{2}}{{O}_{5}}(g)\,\,\to \,\,4N{{O}_{2}}(g)+{{O}_{2}}\,(g)\] if concentration of \[N{{O}_{2}}\] in 100 seconds is increased by\[5.2 \,\times \, 1{{0}^{-}}^{3}m\]. Then rate of reaction will be
A)
\[1.3\,\,\times \,\,{{10}^{-5}}\,m{{s}^{-1}}\]
done
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B)
\[5\,\,\times \,\,{{10}^{-4}}\,m{{s}^{-1}}\]
done
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C)
\[7.6\,\,\times \,\,{{10}^{-4}}\,m{{s}^{-1}}\]
done
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D)
\[2\,\,\times \,\,{{10}^{-\,3}}\,m{{s}^{-1}}\]
done
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View Answer play_arrow
A first-order reaction completes its \[10%\] in 20 minutes then time required to complete its \[19%\] is
A)
30 minutes
done
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B)
40 minutes
done
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C)
50 minutes
done
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D)
38 minutes
done
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View Answer play_arrow
In weak electrolytic solution, degree of ionization
A)
will be proportional to dilution
done
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B)
will be proportional to concentration of electrolyte
done
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C)
will be proportional to the square root of dilution
done
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D)
will be reciprocal to the dilution
done
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View Answer play_arrow
The colour of an electrolyte solution depends on
A)
the nature of the anion
done
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B)
the nature of the cation
done
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C)
the nature of both the ions
done
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D)
the nature of the solvent
done
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View Answer play_arrow
What volume of oxygen gas \[\left( {{O}_{2}} \right)\] measured at \[0{}^\circ C\] and 1 atm is needed to bum completely 1 L of propane gas \[\left( {{C}_{3}}{{H}_{8}} \right)\] measured under the same conditions?
A)
6 L
done
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B)
5 L
done
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C)
10 L
done
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D)
7 L
done
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View Answer play_arrow
The number of atoms in 0.1 mol of a triatomic gas is:
A)
\[6.026 \times \,\,1{{0}^{23}}\]
done
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B)
\[1.806\,\,\times \,\,1{{0}^{23}}\]
done
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C)
\[3.600 \,\times \,\,1{{0}^{23}}\]
done
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D)
\[1.80 \times \,\,1{{0}^{23}}\]
done
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View Answer play_arrow
The number of water molecules is maximum in
A)
18 gram of water
done
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B)
18 moles of water
done
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C)
18 molecules of water
done
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D)
1.8 gram of water
done
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View Answer play_arrow
Maximum number of electrons in a sub-shell of an atom is determined by the following
A)
\[2{{n}^{2}}\]
done
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B)
\[4l+2\]
done
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C)
\[4l+l\]
done
clear
D)
\[4l-2\]
done
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View Answer play_arrow
The correct set of four quantum numbers for the valence electron of rubidium atom \[\left( Z = 37 \right)\] is
A)
\[5,\,0,\,0,+\frac{1}{2}~\]
done
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B)
\[5,\,\,1,\,\,0,\,\,+\frac{1}{2}\]
done
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C)
\[5,\,\,1,\,\,1,\,\,+\frac{1}{2}\]
done
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D)
\[6,\,\,0,\,\,0,\,\,+\frac{1}{2}\]
done
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View Answer play_arrow
Which of the following chambers of the heart has the thickest muscular wall?
A)
left atrium
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B)
right atrium
done
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C)
right ventricle
done
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D)
left ventricle
done
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View Answer play_arrow
Which gland plays a key role in metamorphosis of frog's tadpole?
A)
thymus
done
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B)
thyroid
done
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C)
pancreas
done
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D)
adrenal
done
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View Answer play_arrow
Weberian ossicles are found in
A)
fishes
done
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B)
frogs
done
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C)
snakesq
done
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D)
birds
done
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View Answer play_arrow
Inflammatory response, in allergy, is caused by the release of
A)
histamines
done
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B)
antigen
done
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C)
antibodies
done
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D)
prothrombin
done
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View Answer play_arrow
XO-chromosomal abnormality in human beings causes
A)
Turner's syndrome
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B)
Down's syndrome
done
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C)
Klinefelter's syndrome
done
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D)
none of these
done
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View Answer play_arrow
If a person is injured, he should be given blood. Which of the following blood groups should be given without checking the patient's own blood group?
A)
B
done
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B)
A
done
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C)
AB
done
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D)
O
done
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View Answer play_arrow
Which of the following hormones is a derivative of amino acid?
A)
prostaglandin
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B)
progesterone
done
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C)
epinephrine
done
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D)
estrogen
done
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View Answer play_arrow
Liver in our body stores
A)
vitamin D
done
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B)
vitamin A
done
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C)
\[vitamin\text{ }{{B}_{12}}\]
done
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D)
all of these
done
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View Answer play_arrow
Cumulus covers
A)
ovum
done
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B)
ovary
done
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C)
embryo
done
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D)
all of these
done
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View Answer play_arrow
The function of renin is
A)
stimulation of corpus luteum
done
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B)
vasodilation
done
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C)
to reduce blood pressure
done
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D)
degradation of angiotensinogen
done
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View Answer play_arrow
Which of the following is the example of conditioned reflex?
A)
hand withdraws when pierced with a needle
done
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B)
eyes closed, when anything enters into it
done
clear
C)
during digestion food goes forward in alimentary canal
done
clear
D)
trained dog salivates when you ring a bell
done
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View Answer play_arrow
The heartbeat increases at the time of interview due to
A)
secretion of adrenaline
done
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B)
corticotrophic hormone
done
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C)
hyper secretion of renin
done
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D)
antidiuretic hormone secretion
done
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View Answer play_arrow
The component of blood which prevents its coagulation in the blood vessels is
A)
haemoglobin
done
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B)
plasma
done
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C)
thrombin
done
clear
D)
heparin
done
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View Answer play_arrow
Conn's disease is caused by the over-secretion of
A)
aldosterone
done
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B)
ADH
done
clear
C)
ACTH
done
clear
D)
none of these
done
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View Answer play_arrow
The extra embryonic membranes of mammalian embryo are derived from
A)
inner cell mass
done
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B)
formative cells
done
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C)
Trophoblast
done
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D)
follicle cells
done
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View Answer play_arrow
Which one of the following is true during ageing?
A)
increase in calcium content of arteries and cartilage
done
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B)
decrease in blood urea and GFR
done
clear
C)
decrease in cholesterol content of cornea and lens
done
clear
D)
decrease in calcium content of arteries and cartilage
done
clear
View Answer play_arrow
The end-product of omithine cycle is
A)
carbon dioxide
done
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B)
uric acid
done
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C)
urea
done
clear
D)
ammonia
done
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View Answer play_arrow
Wings of pigeon, mosquito and bat show
A)
divergent evolution
done
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B)
atavism
done
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C)
convergent evolution
done
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D)
all of these
done
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View Answer play_arrow
First step of utilisation of glucose in metabolism is
A)
glycogen
done
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B)
ATP
done
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C)
pyruvic acid
done
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D)
glucose-6-phosphate
done
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View Answer play_arrow
Otorhinolaryngology is the study of
A)
bird's anatomy
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B)
ENT
done
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C)
brain cells
done
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D)
locomotory system
done
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View Answer play_arrow
If one strand of DNA has the nitrogenous base sequence ATGCTTGA, the sequence in the complementary strand will be
A)
TAGGTAGT
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B)
TACGTACT
done
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C)
TACGAACT
done
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D)
TCCGAACT
done
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View Answer play_arrow
When a bacteriophage, in its lytic phase, carries some of the bacterium partially digested chromosome with it to another host cell, the process is called
A)
generalised transduction
done
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B)
conjugation
done
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C)
transformation
done
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D)
specialised transduction
done
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View Answer play_arrow
Restriction endonucleases are utilised in genetic engineering as
A)
molecular scalpers for cutting DNA at specific sites
done
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B)
molecular builder of nucleotides
done
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C)
molecular degradation to DNA break up
done
clear
D)
molecular cement for combining DNA bits into long chains
done
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View Answer play_arrow
The major component of bacterial cell wall is a polymer called
A)
chitin
done
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B)
xylan
done
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C)
cellulose
done
clear
D)
peptidoglycan
done
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View Answer play_arrow
Bryophytes are not characterised by
A)
vascular tissues
done
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B)
well-developed root system
done
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C)
alternation of generation
done
clear
D)
presence of chlorophyll
done
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View Answer play_arrow
Hormogonia are the vegetative reproductive structures of
A)
Oscillatoria
done
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B)
Ulothrix
done
clear
C)
Spirogyra
done
clear
D)
Chlamydomonas
done
clear
View Answer play_arrow
The protein coat of virus is called
A)
capsomeres
done
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B)
prions
done
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C)
viroid
done
clear
D)
capsid
done
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View Answer play_arrow
The organelle found between cell wall of two cells is called
A)
lomasome
done
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B)
lysosome
done
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C)
microsome
done
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D)
middle lamella
done
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View Answer play_arrow
The correct sequence in cell cycle is
A)
\[S-M-{{G}_{1}}-{{G}_{2}}\]
done
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B)
\[S-{{G}_{1}}-{{G}_{2}}-M\]
done
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C)
\[{{G}_{1}}-S-{{G}_{2}}-M\]
done
clear
D)
\[M-{{G}_{1}}-{{G}_{2}}-S\]
done
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View Answer play_arrow
Sporogony of malarial parasite occurs in
A)
stomach wall of mosquito
done
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B)
salivary glands of mosquito
done
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C)
RBCs of man
done
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D)
liver of man
done
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View Answer play_arrow
In spermatogenesis, the acrosome of sperm is formed by
A)
golgi complex
done
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B)
mitochondria
done
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C)
lysosome
done
clear
D)
nucleus
done
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View Answer play_arrow
Paired spermathecae occur in Pheretima in which of the following segments?
A)
6, 7, 8, 9
done
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B)
4, 5, 6, 7
done
clear
C)
5, 6, 7, 8
done
clear
D)
3, 4, 5, 6
done
clear
View Answer play_arrow
Kidney of adult reptiles are
A)
metanephric
done
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B)
mesonephric
done
clear
C)
protonephric
done
clear
D)
all of these
done
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View Answer play_arrow
The familiar disease Amoebiasis is caused by
A)
Taenia solium
done
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B)
Wuchereria bancrofti
done
clear
C)
Entamoeba histolytia
done
clear
D)
Ascaris lumbricoides
done
clear
View Answer play_arrow
Secondary phloem remains functional generally
A)
less than 1 year
done
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B)
more than 1 year
done
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C)
for 1 year
done
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D)
as long as plant lives
done
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View Answer play_arrow
The movement of lamina lobe of Dionaea is
A)
thigmonastic
done
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B)
photonastic
done
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C)
seismonastic
done
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D)
thermonastic
done
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View Answer play_arrow
Casparian strips are the characteristics of
A)
cortex
done
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B)
endodermis
done
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C)
pericycle
done
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D)
pith
done
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View Answer play_arrow
The crystals of calcium carbonate, which appear like a bunch of grapes in epidermal cells of the leaves of some plants, are called
A)
sphaeraphides
done
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B)
raphides
done
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C)
otoliths
done
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D)
cystoliths
done
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View Answer play_arrow
Anemophilous flowers have
A)
small, smooth stigma
done
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B)
coloured flower
done
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C)
sessile stigma
done
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D)
large feathery stigma
done
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View Answer play_arrow
The root cell of wheat plant has 42 chromosomes. What would be the number of chromosomes in the synergid cell?
A)
21
done
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B)
7
done
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C)
28
done
clear
D)
14
done
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View Answer play_arrow
The high energy bonds of ATP arc between
A)
C-O
done
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B)
O-P
done
clear
C)
C-N
done
clear
D)
C-C
done
clear
View Answer play_arrow
Which of the following is responsible for the mechanical support, protein synthesis and enzyme transport?
A)
cell membrane
done
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B)
mitochondria
done
clear
C)
dictyosome
done
clear
D)
endoplasmic reticulum
done
clear
View Answer play_arrow
The vascular cambium and cork cambium are the examples of
A)
apical meristem
done
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B)
lateral meristem
done
clear
C)
intercalary meristem
done
clear
D)
elements of xylem and phloem
done
clear
View Answer play_arrow
Crop rotation is used by farmers to increase
A)
nitrogenous content of soil
done
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B)
organic content of soil
done
clear
C)
soil fertility
done
clear
D)
all of these
done
clear
View Answer play_arrow
The food chain, in which microorganisms break down the energy-rich compounds synthesises by producers is called
A)
ecosystem
done
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B)
detritus food chain
done
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C)
parasitic food chain
done
clear
D)
predator food chain
done
clear
View Answer play_arrow
Obligate parasites are those organisms which
A)
live only on living host
done
clear
B)
are essentially parasites but can also become saprophyte
done
clear
C)
live only on dead and decaying organic matter
done
clear
D)
are essentially saprophytes but can also becomes parasites
done
clear
View Answer play_arrow
If a homozygous red-flowered plant is crossed with a homozygous white-flowered plant, the offsprings will be
A)
half-white flowered
done
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B)
half red-flowered
done
clear
C)
all white-flowered
done
clear
D)
all red-flowered
done
clear
View Answer play_arrow
Nitrous acid causes mutation by
A)
acting as a base analogue
done
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B)
addition of a base pair
done
clear
C)
hydrolysing base sugar linkage
done
clear
D)
removing amino group from the bases
done
clear
View Answer play_arrow
Ficus is an example of which kind of inflorescence?
A)
raceme
done
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B)
spike
done
clear
C)
cyathium
done
clear
D)
hypanthodium
done
clear
View Answer play_arrow
Which of the following reduces plant growth and induces dormancy?
A)
cytokinin
done
clear
B)
auxin
done
clear
C)
xylene
done
clear
D)
abscisic acid
done
clear
View Answer play_arrow
Viruses that infect bacteria, multiply and cause their lysis are called
A)
Lipolytic
done
clear
B)
Lytic
done
clear
C)
Lysogenic
done
clear
D)
Lysozymes
done
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View Answer play_arrow
Which of the following environmental conditions are essential for optimum growth of Mucor on a piece of bread?
A. \[Temperature\text{ }of\text{ }about\text{ }25{}^\circ C\] B. \[Temperature\text{ }of\text{ }about\text{ }5{}^\circ C\] C. \[Relative\text{ }humidity\text{ }of\text{ }about\text{ }5%\] D. \[Relative\text{ }humidity\text{ }of\text{ }about\text{ }95%\] E. A shady place F. A brightly illuminated place Choose the answer from the following option.
A)
A, C and E only
done
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B)
A, D and E only
done
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C)
B, D and E only
done
clear
D)
B, C and F only
done
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View Answer play_arrow
Which one of the following statements about mycoplasma is wrong?
A)
They cause diseases in plants
done
clear
B)
They are also called PPLO
done
clear
C)
They are pleomorphic
done
clear
D)
They are sensitive to penicillin
done
clear
View Answer play_arrow
Virus envelope is known as
A)
Capsid
done
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B)
Virion
done
clear
C)
Nucleoprotein
done
clear
D)
Core
done
clear
View Answer play_arrow
Archegoniophore is present in:
A)
Funaria
done
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B)
Marchantia
done
clear
C)
Chara
done
clear
D)
Adiantum
done
clear
View Answer play_arrow
Five kingdom system of classification suggest by R. H. Whittaker is not based on
A)
Presence or absence of a well-defined nucleus
done
clear
B)
Mode of reproduction
done
clear
C)
Mode of nutrition
done
clear
D)
Complexity of body organization.
done
clear
View Answer play_arrow
Algae have cell wall made up of
A)
Cellulose, galactans and mannans
done
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B)
Hemicellulose, pectins and proteins
done
clear
C)
Pectins, cellulose and proteins
done
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D)
Cellulose, hemicellulose and pectins
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How many organisms in the list given below are autotrophsl Lactobacillus, Nostoc, Chara, Nitrosomor Nitrobacter, Streptomyces, Saccharomycc Trypanosoma, Porphyra, Wolffia
A)
Five
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B)
Six
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C)
Three
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D)
Four
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What is common about Trypanosoma, NocSluca, Monocystis and Giardia?
A)
These are all unicellular protists
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B)
They have flagella
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C)
They produce spores
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D)
These are all parasites
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Which one of the following kinds of animals are triploblastic?
A)
Flat worms
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B)
Sponges
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C)
Ctenophores
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D)
Corals
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Select the Taxon mentioned that represents both marine and fresh water species:
A)
Echinoderms
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B)
Ctenophora
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C)
Cephalochordata
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D)
Cnidaria
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Keel is characteristic of the flowers of:
A)
Gulmohar
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B)
Cassia
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C)
Calotropis
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D)
Bean
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Cymose inflorescence is present in
A)
Trifolium
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B)
Brassica
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C)
Solanum
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D)
Sesbania
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An example of edible underground stem is:
A)
Carrot
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B)
Groundnut
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C)
Sweet potato
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D)
Potato
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Axile placentation is present in:
A)
Argemone
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B)
Dianthus
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C)
Lemon
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D)
Pea
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Which one of the following is resistant to enzyme action?
A)
Pollen exine
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B)
Leaf cuticle
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C)
Cork
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D)
Wood fibre
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Heartwood differs from sapwood in
A)
Presence of rays and fibres
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B)
Absence of vessels and parenchyma
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C)
Having dead and non-conducting elements
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D)
Being susceptible to pests and pathogens
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Closed vascular bundles lack
A)
Cambium
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B)
Pith
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C)
Ground tissue
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D)
Conjunctive tissue
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A major characteristic of the monocot root is the presence of:
A)
Cambium sandwiched between phloem and xylem along the radius
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B)
Open vascular bundles
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C)
Scattered vascular bundles
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D)
Vasculature without cambium
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Compared to those of humans, the erythrocytes in frog are:
A)
Very much smaller and fewer
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B)
Nucleated and without haemoglobin
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C)
Without nucleus but with haemoglobin
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D)
Nucleated and with haemoglobin
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The plasma membrane consists mainly of
A)
phospholipids embedded in a protein bilayer
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B)
proteins embedded in a phospholipid bilayer
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C)
proteins embedded in a polymer of glucose molecules
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D)
proteins embedded in a carbohydrate bilayer
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What is true about ribosomes?
A)
These are found only in eukaryotic cells
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B)
These are self-splicing introns of some RNAs.
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C)
The prokaryotic ribosomes are 80 S, where ?S? stands for sedimentation coefficient.
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D)
There are composed of ribonucleic acid and proteins
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Which one of the following is not an inclusion body found in prokaryotes?
A)
Polysome
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B)
Phosphate granule
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C)
Cyanophycean granule
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D)
Glycogen granule
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Which one of the following statements is incorrect?
A)
The presence of the competitive inhibitor decreases the \[{{K}_{m}}\] of the enzyme for the substrate.
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B)
A competitive inhibitor reacts reversibly with the enzyme to form an enzyme - inhibitor complex.
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C)
In competitive inhibition, the inhibitor molecule is not chemically changed by the enzyme.
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D)
The competitive inhibitor does not affect the rate of breakdown of the enzyme - substrate complex.
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Deficiency symptoms of nitrogen and potassium are visible first in:
A)
Senescent leaves
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B)
Young leaves
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C)
Roots
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D)
Buds
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\[{{C}_{4}}\] plants are more efficient in photosynthesis than \[{{C}_{3}}\], plants due to:
A)
Higher leaf area
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B)
Presence of large number of chloroplasts in the leaf cells
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C)
Presence of thin cuticle
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D)
Lower rate of photorespiration
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Which one of the following is not used for ex situ plant conservation?
A)
Field gene banks
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B)
Seed banks
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C)
Shifting cultivation
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D)
Botanical Gardens
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Where do certain symbiotic microorganisms normally occur in human body?
A)
Oral lining and tongue surface
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B)
Vermiform appendix and rectum
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C)
Duodenum
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D)
Caecum
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A pregnant female delivers a baby who suffers from stunted growth, mental retardation, low intelligence quotient and abnormal skin. This is the result of:
A)
Deficiency of iodine in diet
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B)
Low secretion of growth hormone
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C)
Cancer of the thyroid gland
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D)
Over secretion of pars distalis
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Nucellar polyembryony is reported in species of:
A)
Brassica
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B)
Citrus
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C)
Gossypium
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D)
Triticum
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Male gametophyte with least number of cells is present in:
A)
Pteris
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B)
Funaria
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C)
Lilium
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D)
Pinus
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Select the correct option describing gonadotropin activity in a normal pregnant female:
A)
High level of FSH and LH stimulates the thickening of endometrium
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B)
High level of FSH and LH facilitate implantation of the embryo.
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C)
high level of hCG stimulates the synthesize of estrogen and progesterone
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D)
High level of hCG stimulates the thickening of endometrium
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Phenotype of an organism is the result of:
A)
Mutations and linkages
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B)
Cytoplasmic effects and nutrition
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C)
Environmental changes and sexual dimorphism
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D)
Genotype and environment interactions
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Inheritance of skin colour in humans is an example of:
A)
Codominance
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B)
Chromosomal aberration
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C)
Point mutation
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D)
Polygenic inheritance
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Sickle cell anamia is:
A)
Characterized by elongated sickle like RBCs with a nucleus
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B)
An autosomal linked dominant trait
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C)
Caused by substitute of valine by glutamic acid in the beta globin chain of haemoglobin
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D)
Caused by a change in a single base pair of DNA
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A normal visioned man whose father was colour blind, marries a woman whose father was also colour blind. They have their first child as a daughter. What are the chances that this child would be colour blind.
A)
\[25%\]
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B)
\[50%\]
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C)
\[100%\]
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D)
Zero percent
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A man whose father was colour blind marries a woman who had a colour blind mother and normal father. What percentage of male children of this couple will be colour blind?
A)
\[25%\]
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B)
\[0%\]
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C)
\[50%\]
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D)
\[75%\]
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A pleiotropic gene:
A)
controls multiple traits in an individual
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B)
is expressed only in primitive plants
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C)
is a gene evolved during Pliocene
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D)
controls a trait only in combination another gene
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During replication of a bacterial chromosomal DNA synthesis starts from a replication origin site and:
A)
is facilitated by telomerase
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B)
moves in one direction of the size
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C)
moves in bi-directional way
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D)
RNA primers are involved
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One gene-one enzyme relationship was established for the first time in:
A)
Diplococcus pneumonae
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B)
Neurospora crassia
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C)
Salmonella typhimurium
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D)
Escherichia coli
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