The velocity of water in a river is 18 km/h near the surface. If the river is 5 m deep, find the shearing stress between the horizontal layers of water. The co-efficient of viscosity of water\[={{10}^{-2}}paise\]
A)
\[{{10}^{-1}}N/{{m}^{2}}\]
done
clear
B)
\[{{10}^{-2}}N/{{m}^{2}}\]
done
clear
C)
\[{{10}^{-3}}N/{{m}^{2}}\]
done
clear
D)
\[{{10}^{-4}}N/{{m}^{2}}\]
done
clear
View Answer play_arrow
Consider two hot bodies \[{{B}_{1}}\] and \[{{B}_{2}}\] which have temperatures \[100{}^\circ C\] and \[80{}^\circ C\] respectively at \[t=0\]. The temperature of the surroundings is \[40{}^\circ C\]. The ratio of the respective rates of cooling \[{{R}_{1}}\] and \[{{R}_{2}}\] of these two bodies at \[t=0\] will be
A)
\[{{R}_{1}}:{{R}_{2}}=3:2\]
done
clear
B)
\[{{R}_{1}}:{{R}_{2}}=5:4\]
done
clear
C)
\[{{R}_{1}}:{{R}_{2}}=2:3\]
done
clear
D)
\[{{R}_{1}}:{{R}_{2}}=4:5\]
done
clear
View Answer play_arrow
A hospital uses an ultrasonic scanner to locate tumours in a tissue. The operating frequency of the scanner is 4.2 MHz. The speed of sound in a tissue is 1.7 km/s. The wavelength of sound in tissue is close to
A)
\[4\times {{10}^{-4}}m\]
done
clear
B)
\[8\times {{10}^{-4}}m\]
done
clear
C)
\[4\times {{10}^{-3}}m\]
done
clear
D)
\[8\times {{10}^{-3}}m\]
done
clear
View Answer play_arrow
A primary cell has an e.m.f. of 1.5 volt. When short-circuited it gives a current of 3 ampere. The internal resistance of the cell is
A)
4.5 ohm
done
clear
B)
2 ohm
done
clear
C)
0.5 ohm
done
clear
D)
1.5 ohm
done
clear
View Answer play_arrow
The magnetic lines of force inside a bar magnet
A)
are from N-pole to S-pole of magnet
done
clear
B)
do not exist
done
clear
C)
depend upon the area of cross-section of bar magnet
done
clear
D)
are from S-pole to N-pole of magnet
done
clear
View Answer play_arrow
An ideal gas A and a real gas B have their volumes increased from V to 2 V under isothermal conditions. The increase in internal energy
A)
will be same in both A and B
done
clear
B)
will be zero in both the cases
done
clear
C)
of B will be more than that of A
done
clear
D)
of A will be more than that of B
done
clear
View Answer play_arrow
A metallic rod of length '\[\ell \]' is tied to a string of length \[2\ell \] and made to rotate with angular speed co on a horizontal table with one end of the string fixed. If there is a vertical magnetic field 'B' in the region, the e.m.f. induced across the ends of the rod is
A)
\[\frac{2B\omega {{\ell }^{2}}}{2}\]
done
clear
B)
\[\frac{3B\omega {{\ell }^{2}}}{2}\]
done
clear
C)
\[\frac{4B\omega {{\ell }^{2}}}{2}\]
done
clear
D)
\[\frac{5B\omega {{\ell }^{2}}}{2}\]
done
clear
View Answer play_arrow
10 cm is a wavelength corresponding to the spectrum of
A)
infrared rays
done
clear
B)
ultraviolet rays
done
clear
C)
microwaves
done
clear
D)
\[\gamma \]-rays
done
clear
View Answer play_arrow
The transformer voltage induced in the secondary coil of a transformer is mainly due to
A)
a varying electric field
done
clear
B)
a varying magnetic field
done
clear
C)
the vibrations of the primary coil
done
clear
D)
the iron core of the transformer
done
clear
View Answer play_arrow
A straight rod of length L extends from x = a to x = L + a. Find the gravitational force it exerts on a point mass m at x = 0 if the linear density of rod \[\mu =A+B{{x}^{2}}.\]
A)
\[Gm\left[ \frac{A}{a}+BL \right]\]
done
clear
B)
\[Gm\left[ A\left( \frac{1}{a}-\frac{1}{a+L} \right)+BL \right]\]
done
clear
C)
\[Gm\left[ BL+\frac{A}{a+L} \right]\]
done
clear
D)
\[Gm\left[ BL-\frac{A}{a} \right]\]
done
clear
View Answer play_arrow
A body of mass 5 kg under the action of constant force \[\overset{\to }{\mathop{F}}\,={{F}_{x}}\hat{i}+{{F}_{y}}\hat{j}\] has velocity at \[t=0\,s\] as \[\overset{\to }{\mathop{v}}\,=\left( 6\hat{i}-2\hat{j}\,\,m/s \right)\] and at \[t=10\,s\] as\[\overset{\to }{\mathop{v}}\,=+6\hat{j}\,m/s.\] The force \[\overset{\to }{\mathop{F}}\,\] is:
A)
\[\left( -3\hat{i}+4\hat{j} \right)N\]
done
clear
B)
\[\left( -\frac{3}{5}\hat{i}+\frac{4}{5}\hat{j} \right)N\]
done
clear
C)
\[\left( 3\hat{i}-4\hat{j} \right)N\]
done
clear
D)
\[\left( \frac{3}{5}\hat{i}-\frac{4}{5}\hat{j} \right)N\]
done
clear
View Answer play_arrow
When sound waves travel from air to water, which one of the following remains constant?
A)
Time period
done
clear
B)
Frequency
done
clear
C)
Velocity
done
clear
D)
Wavelength
done
clear
View Answer play_arrow
In the network shown, each resistance is equal to R. The equivalent resistance between adjacent corners A and D is
A)
\[R\]
done
clear
B)
\[\frac{2}{3}R\]
done
clear
C)
\[\frac{3}{7}R\]
done
clear
D)
\[\frac{8}{15}R\]
done
clear
View Answer play_arrow
The electrostatic potential inside a charged spherical ball is given by \[\phi =a{{r}^{2}}+b\] where r is the distance from the centre and a, b are constants. Then the charge density inside the ball is:
A)
\[-6a{{\varepsilon }_{0}}r\]
done
clear
B)
\[-24\pi a{{\varepsilon }_{0}}\]
done
clear
C)
\[-6a{{\varepsilon }_{0}}\]
done
clear
D)
\[-24\pi a{{\varepsilon }_{0}}r\]
done
clear
View Answer play_arrow
A particle of mass \[{{m}_{1}}\] is moving with a velocity \[{{v}_{1}}\] and another particle of mass \[{{m}_{2}}\] is moving with a velocity \[{{v}_{2}}.\] Both of them have the same momentum but different kinetic energies are \[{{E}_{1}}\] And \[{{E}_{2}}\] respectively. If \[{{m}_{1}}>{{m}_{2}}\] then
A)
\[{{E}_{1}}={{E}_{2}}\]
done
clear
B)
\[{{E}_{1}}<{{E}_{2}}\]
done
clear
C)
\[\frac{{{E}_{1}}}{{{E}_{2}}}=\frac{{{m}_{1}}}{{{m}_{2}}}\]
done
clear
D)
\[{{E}_{1}}>{{E}_{2}}\]
done
clear
View Answer play_arrow
If Q, E and W denote respectively the heat added, change in internal energy and the work done in a closed cyclic process, then
A)
W = 0
done
clear
B)
Q = W = Q
done
clear
C)
E = 0
done
clear
D)
Q = 0
done
clear
View Answer play_arrow
The moment of inertia of disc about a tangent axis in its plane is
A)
\[\frac{M{{R}^{2}}}{4}\]
done
clear
B)
\[\frac{3M{{R}^{2}}}{2}\]
done
clear
C)
\[\frac{5}{4}M{{R}^{2}}\]
done
clear
D)
\[\frac{7M{{R}^{2}}}{4}\]
done
clear
View Answer play_arrow
After 300 days, the activity of a radioactive sample is 5000 dps (disintegrations per sec). The activity becomes 2500 dps after another 150 days. The initial activity of the sample in dps is
A)
20,000
done
clear
B)
10,000
done
clear
C)
7,000
done
clear
D)
25,000
done
clear
View Answer play_arrow
A shunt of resistance \[1\,\,\Omega \] is connected across a galvanometer of \[120\,\,\Omega \] resistance. A current of 5.5 ampere gives full scale deflection in the galvanometer. The current that will give full scale deflection in the absence of the shunt is nearly:
A)
5.5 ampere
done
clear
B)
0.5 ampere
done
clear
C)
0.004 ampere
done
clear
D)
0.045 ampere
done
clear
View Answer play_arrow
Monochromatic light of frequency \[6.0\times {{10}^{14}}Hz\] is produced by a laser. The power emitted is \[2\times {{10}^{-3}}W.\]The number of photons emitted, on the average, by the source per second is
A)
\[5\times {{10}^{16}}\]
done
clear
B)
\[5\times {{10}^{17}}\]
done
clear
C)
\[5\times {{10}^{14}}\]
done
clear
D)
\[5\times {{10}^{15}}\]
done
clear
View Answer play_arrow
Three straight parallel current carrying conductors are shown in the figure. The force experienced by the middle conductor of length 25 cm is:
A)
\[3\times {{10}^{-4}}N\] toward right
done
clear
B)
\[6\times {{10}^{-4}}N\] toward right
done
clear
C)
\[9\times {{10}^{-4}}N\] toward right
done
clear
D)
Zero
done
clear
View Answer play_arrow
A steel wire of length 20 cm and uniform cross- section \[1\,\,m{{m}^{2}}\] is tied rigidly at both the ends. The temperature of the wire is altered from \[40{}^\circ C\] to \[20{}^\circ C.\] Coefficient of linear expansion for steel \[\alpha =1.1\times {{10}^{-5}}/{}^\circ C\] and Y for steel is \[2.0\times {{10}^{11}}N/{{m}^{2}}.\] The change in tension of the wire is
A)
\[2.2\times {{10}^{6}}\]newton
done
clear
B)
16 newton
done
clear
C)
8 newton
done
clear
D)
44 newton
done
clear
View Answer play_arrow
The most appropriate magnetization M versus magnetising field H curve for a paramagnetic substance is
A)
A
done
clear
B)
B
done
clear
C)
C
done
clear
D)
D
done
clear
View Answer play_arrow
The pressure P of an ideal gas and its mean K.E. per unit volume are related as
A)
\[P=\frac{E}{2}\]
done
clear
B)
\[P=E\]
done
clear
C)
\[P=\frac{3E}{2}\]
done
clear
D)
\[P=\frac{2E}{3}\]
done
clear
View Answer play_arrow
A telescope has an objective lens of focal length 150 cm and an eyepiece of focal length 5 cm. If a 50 m tall tower at a distance of 1 km is observed through this telescope in normal setting, the angle formed by the image of the tower is \[\theta ,\] then \[\theta \] is close to:
A)
\[30{}^\circ \]
done
clear
B)
\[15{}^\circ \]
done
clear
C)
\[84{}^\circ \]
done
clear
D)
\[1{}^\circ \]
done
clear
View Answer play_arrow
A metal sample carrying a current along X-axis with density \[{{J}_{x}}\] is subjected to a magnetic field \[{{B}_{z}}\] (along z-axis). The electric field \[{{E}_{y}}\] developed along Y-axis is directly proportional to \[{{J}_{x}}\] as well as \[{{B}_{z}}.\] The constant of proportionality has SI unit.
A)
\[\frac{{{m}^{2}}}{A}\]
done
clear
B)
\[\frac{{{m}^{3}}}{As}\]
done
clear
C)
\[\frac{{{m}^{2}}}{As}\]
done
clear
D)
\[\frac{As}{{{m}^{3}}}\]
done
clear
View Answer play_arrow
The distance travelled by a body moving along a line in time t is proportional to \[{{t}^{3}}.\] The acceleration-time (a, t) graph for the motion of the body will be
A)
done
clear
B)
done
clear
C)
done
clear
D)
done
clear
View Answer play_arrow
Which one of the following statements is false?
A)
A vector has only magnitude, whereas a scalar has both magnitude and direction
done
clear
B)
Distance is a scalar quantity but displacement is a vector quantity
done
clear
C)
Momentum, force and torque are vector quantities
done
clear
D)
Mass, speed and energy are scalar quantities
done
clear
View Answer play_arrow
The effective acceleration of a body when thrown upwards with acceleration a is
A)
\[(g+a)\]
done
clear
B)
\[(g-a)\]
done
clear
C)
√\[({{g}^{2}}+{{a}^{2}})\]
done
clear
D)
\[(g-{{a}^{2}}/g)\]
done
clear
View Answer play_arrow
A motor car is travelling at 30 m/s on a circular road of radius 500 m. It is increasing in speed at the rate of \[2\,\,m/{{s}^{2}}.\] Then the acceleration of the car will be
A)
\[4\,\,m/{{s}^{2}}\]
done
clear
B)
\[3\,\,m/{{s}^{2}}\]
done
clear
C)
\[2.7\,\,m/{{s}^{2}}\]
done
clear
D)
\[8\,\,m/{{s}^{2}}\]
done
clear
View Answer play_arrow
A boat is sent across a river with a velocity of \[8\,\,km\,{{h}^{-1}}.\] If the resultant velocity of boat is \[10\,\,km\,{{h}^{-1}},\] then the velocity of the river is
A)
\[12.8\,\,km\,{{h}^{-1}}\]
done
clear
B)
\[6\,\,km\,{{h}^{-1}}\]
done
clear
C)
\[8\,\,km\,{{h}^{-1}}\]
done
clear
D)
\[10\,\,km\,{{h}^{-1}}\]
done
clear
View Answer play_arrow
How many electrons make up a charge of \[20\mu C?\]
A)
\[1.25\times {{10}^{14}}\]
done
clear
B)
\[2.23\times {{10}^{14}}\]
done
clear
C)
\[3.25\times {{10}^{14}}\]
done
clear
D)
\[5.25\times {{10}^{14}}\]
done
clear
View Answer play_arrow
If a spherical ball rolls on a table without slipping the fraction of its total energy associated with rotational energy is
A)
\[\frac{3}{5}\]
done
clear
B)
\[\frac{2}{7}\]
done
clear
C)
\[\frac{2}{5}\]
done
clear
D)
\[\frac{3}{7}\]
done
clear
View Answer play_arrow
An insect crawls up a hemispherical surface very slowly. The coefficient of friction between the insect and the surface is 1/3. If the line joining the centre of the hemispherical surface to the insect makes an angle a with the vertical, the maximum possible value of a so that the insect does not slip is given by
A)
\[\cot \,\,\alpha =3\]
done
clear
B)
\[\sec \,\,\alpha =3\]
done
clear
C)
\[cosec\,\,\alpha =3\]
done
clear
D)
\[cos\,\,\alpha =3\]
done
clear
View Answer play_arrow
Yellow light is used in a single slit diffraction experiment with slit width of 0.6 mm. If yellow light is replaced by X- rays, then the observed pattern will reveal,
A)
that the central maximum is narrower
done
clear
B)
more number of fringes
done
clear
C)
less number of fringes
done
clear
D)
no diffraction pattern
done
clear
View Answer play_arrow
Which one is possible?
A)
\[{}_{7}{{N}^{19}}+{}_{0}{{n}^{1}}\to {}_{7}{{N}^{16}}+{}_{1}{{N}^{1}}\]
done
clear
B)
\[{}_{16}{{S}^{32}}+{}_{1}{{H}^{1}}\to {}_{17}C{{l}^{35}}+{}_{2}H{{e}^{4}}\]
done
clear
C)
\[{}_{8}{{O}^{16}}+{}_{0}{{n}^{1}}\to {}_{7}{{N}^{14}}+3\,\,{}_{1}{{H}^{1}}+2{}_{-1}{{\beta }^{0}}\]
done
clear
D)
\[{}_{1}{{H}^{1}}+{}_{1}{{H}^{1}}\to {}_{2}H{{e}^{4}}\]
done
clear
View Answer play_arrow
When a ray of light enters a glass slab from air,
A)
its wavelength decreases
done
clear
B)
its wavelength increases
done
clear
C)
its frequency decreases
done
clear
D)
neither its wavelength nor its frequency changes.
done
clear
View Answer play_arrow
A charged particle q is placed at the centre O of cube of length L (ABCDEFGH). Another same charge q is placed at a distance L from O. Then the electric flux through ABCD is
A)
\[q/4\pi {{\in }_{0}}L\]
done
clear
B)
Zero
done
clear
C)
\[q/2\pi {{\in }_{0}}L\]
done
clear
D)
\[q/3\pi {{\in }_{0}}L\]
done
clear
View Answer play_arrow
A body is projected at an angle of \[30{}^\circ \] to the horizontal with speed 30 m/s. What is the angle with the horizontal after 1.5 seconds? Take \[g=10m/{{s}^{2}}.\]
A)
\[0{}^\circ \]
done
clear
B)
\[30{}^\circ \]
done
clear
C)
\[60{}^\circ \]
done
clear
D)
\[90{}^\circ \]
done
clear
View Answer play_arrow
A fully charged capacitor C with initial charge \[{{Q}_{0}}\] is connected to a coil of self-inductance L at t = 0. The time at which the energy is stored equally between the electric and the magnetic field is
A)
\[\frac{\pi }{4}\sqrt{LC}\]
done
clear
B)
\[2\pi \sqrt{LC}\]
done
clear
C)
\[\sqrt{LC}\]
done
clear
D)
\[\pi \sqrt{LC}\]
done
clear
View Answer play_arrow
Of the various series of the hydrogen spectrum, the one which lies wholly in the ultraviolet region is
A)
Lyman series
done
clear
B)
Balmer series
done
clear
C)
Paschen series
done
clear
D)
Bracket series
done
clear
View Answer play_arrow
The combination of gates shown below yields
A)
OR gate
done
clear
B)
NOT gate
done
clear
C)
AND gate
done
clear
D)
NAND gate
done
clear
View Answer play_arrow
An artificial satellite moving in a circular orbit around the earth has a total (kinetic + potential) energy \[{{E}_{0}}.\] Its potential energy is
A)
\[-{{E}_{0}}\]
done
clear
B)
\[1.5{{E}_{0}}\]
done
clear
C)
\[2{{E}_{0}}\]
done
clear
D)
\[{{E}_{0}}\]
done
clear
View Answer play_arrow
In the Bohr's model of hydrogen-like atom the force between the nucleus and the electron is modified as \[F=\frac{{{e}^{2}}}{4\pi {{\varepsilon }_{0}}}\left( \frac{1}{{{r}^{2}}}+\frac{\beta }{{{r}^{3}}} \right),\] where \[\beta \] is a constant. For this atom, the radius of the \[{{n}^{th}}\] orbit in terms of the Bohr radius \[\left( {{a}_{0}}=\frac{{{\varepsilon }_{0}}{{h}^{2}}}{m\pi {{e}^{2}}} \right)\] is:
A)
\[{{r}_{n}}={{a}_{0}}n-\beta \]
done
clear
B)
\[{{r}_{n}}={{a}_{0}}{{n}^{2}}+\beta \]
done
clear
C)
\[{{r}_{n}}={{a}_{0}}{{n}^{2}}-\beta \]
done
clear
D)
\[{{r}_{n}}={{a}_{0}}n+\beta \]
done
clear
View Answer play_arrow
Two coherent plane light waves of equal amplitude makes a small angle \[\alpha (<<1)\] with each other. They fall almost normally on a screen. If \[\lambda \]is the wavelength of light waves, the fringe width \[\Delta x\] of interference patterns of the two sets of waves on the screen is
A)
\[\frac{2\lambda }{\alpha }\]
done
clear
B)
\[\frac{\lambda }{\alpha }\]
done
clear
C)
\[\frac{\lambda }{(2\alpha )}\]
done
clear
D)
\[\frac{\lambda }{\sqrt{\alpha }}\]
done
clear
View Answer play_arrow
Dissolving 120 g of a compound of (mol. wt. 60) in 1000 g of water gave a solution of density 1.12 g/mL. The molarity of the solution is:
A)
1.00 M
done
clear
B)
2.00 M
done
clear
C)
2.50 M
done
clear
D)
4.00 M
done
clear
View Answer play_arrow
The standard enthalpy of formation \[({{\Delta }_{f}}H{}^\circ \,{{\,}_{298}})\] for methane, \[C{{H}_{4}}\] is \[-74.9\,kJ\,mo{{l}^{-1}}.\] In order to calculate the average energy given out in the formation of a \[C-H\] bond from this it is necessary to know which one of the following?
A)
The dissociation energy of the hydrogen molecule,\[{{H}_{2}}.\]
done
clear
B)
The first four ionisation energies of carbon.
done
clear
C)
The dissociation energy of \[{{H}_{2}}\] and enthalpy of sublimation of carbon (graphite).
done
clear
D)
The first four ionisation energies of carbon and electron affinity of hydrogen.
done
clear
View Answer play_arrow
1.08 g of pure silver was converted into silver nitrate and its solution was taken in a beaker. It was electrolysed using platinum cathode and silver anode. 0.01 Faraday of electricity was passed using 0.15 volt above the decomposition potential of silver. The silver content of the beaker after the above shall be
A)
0 g
done
clear
B)
0.108 g
done
clear
C)
0.108 g
done
clear
D)
1.08 g
done
clear
View Answer play_arrow
Number of electrons transfered in each case when \[KMn{{O}_{4}}\] acts as an oxidising agent to give \[Mn{{O}_{2}},\] \[M{{n}^{2+}},\] and \[Mn_{4}^{2-}\] are respectively
A)
3, 5, 4 and 1
done
clear
B)
4, 3, and 5
done
clear
C)
1, 3, 4 and 5
done
clear
D)
5, 4, 3 and 1
done
clear
View Answer play_arrow
Addition of HI to double bond of propene yields isopropyi iodide and not n-propyi iodide as the major product, because addition proceeds through
A)
a more stable carbonium ion.
done
clear
B)
a more stable carbanion.
done
clear
C)
a more stable free radical.
done
clear
D)
homolysis.
done
clear
View Answer play_arrow
Which of the following is a biodegradable polymer?
A)
\[{{[-HN-{{(C{{H}_{2}})}_{5}}CONH-C{{H}_{2}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-]}_{n}}\]
done
clear
B)
\[{{[-HN-{{(C{{H}_{2}})}_{5}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-]}_{n}}\]
done
clear
C)
\[{{[-HN-{{(C{{H}_{2}})}_{6}}NHCO-{{(C{{H}_{2}})}_{4}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-]}_{n}}\]
done
clear
D)
done
clear
View Answer play_arrow
Which of the following is a redox reaction?
A)
Reaction of \[{{H}_{2}}S{{O}_{4}}\] with NaOH.
done
clear
B)
In atomosphere, \[{{O}_{3}}\] from \[{{O}_{2}}\] by lightning.
done
clear
C)
Nitrogen oxides from nitrogen and oxygen decomposition by lightning.
done
clear
D)
Evaporation of \[{{H}_{2}}O.\]
done
clear
View Answer play_arrow
Standard entropy of \[{{X}_{2}},\]\[{{Y}_{2}}\] and X \[{{Y}_{3}}\] are 60, 40 and \[50\,J\,{{K}^{-1}}mo{{l}^{-1}},\] respectively. For the reaction, \[\frac{1}{2}{{X}_{2}}+\frac{3}{2}{{Y}_{2}}\to X{{Y}_{3}},\]\[\Delta H=-30kJ,\] to be at equilibrium, the temperature will be
A)
1250 K
done
clear
B)
500 K
done
clear
C)
1000 K
done
clear
D)
750 K
done
clear
View Answer play_arrow
The cell constant of a given cell is \[0.47\,c{{m}^{-1}}.\] The resistance of a solution placed in this cell is measured to be 31.6 ohm. The conductivity of the solution (in \[S\,c{{m}^{-1}}\] where S has usual meaning) is-
A)
0.15
done
clear
B)
1.5
done
clear
C)
0.015
done
clear
D)
150
done
clear
View Answer play_arrow
Consider the following changes \[A\to {{A}^{+}}+{{e}^{-}}:{{E}_{1}}\] and \[{{A}^{+}}\to {{A}^{2+}}+{{e}^{-}}:{{E}_{2}}\] The energy required to pull out the two electrons are \[{{E}_{1}}\] and \[{{E}_{2}}\] respectively. The correct relationship between two energies would be
A)
\[{{E}_{1}}<{{E}_{2}}\]
done
clear
B)
\[{{E}_{1}}={{E}_{2}}\]
done
clear
C)
\[{{E}_{1}}>{{E}_{2}}\]
done
clear
D)
\[{{E}_{1}}\ge {{E}_{2}}\]
done
clear
View Answer play_arrow
The major organic compound formed by the reaction of 1, 1, 1-trichloroethane with silver powder is:
A)
Acetylene
done
clear
B)
Ethene
done
clear
C)
2-Butyne
done
clear
D)
2-Butene
done
clear
View Answer play_arrow
The end product [C] in the following sequence of reactions is \[HC\equiv CH\xrightarrow[20%\,\,{{H}_{2}}S{{O}_{4}}]{1%HgS{{O}_{4}}}A\xrightarrow[{{H}_{2}}O]{C{{H}_{3}}MgX}B\xrightarrow{[O]}(C)\]
A)
Acetic acid
done
clear
B)
Isopropyi alcohol
done
clear
C)
Acetone
done
clear
D)
Ethanol
done
clear
View Answer play_arrow
At \[{{0}^{0}}\]C and one aim pressure, a gas occupies 100 cc. If the pressure is increased to one and a half-time and temperature is increased by one third of absolute temperature, then final volume of the gas will be
A)
80 cc
done
clear
B)
88.9 cc
done
clear
C)
66.7 cc
done
clear
D)
100 cc
done
clear
View Answer play_arrow
Which one of the following statement is not true?
A)
The conjugate base of \[{{H}_{2}}P{{O}_{4}}^{-}\] is \[HP{{O}_{4}}^{2-}.\]
done
clear
B)
pH + pOH = 14 for all aqueous solutions.
done
clear
C)
the pH of \[1\times {{10}^{-8}}M\,HCL\] is 8.
done
clear
D)
96,500 coulombs of electricity when passed through a \[CuS{{O}_{4}}\] solution deposits 1 gram equivalent of copper at the Cathode.
done
clear
View Answer play_arrow
For a reaction of type \[A+B\xrightarrow{{}}\] products, it is observed that doubling concentration of A causes the reaction rate to be four times as great, but doubling amount of B does not affect the rate. The rate equation is
A)
Rate\[=K[A][B]\]
done
clear
B)
Rate\[=\frac{K}{4}{{[A]}^{2}}\]
done
clear
C)
Rate\[=K{{[A]}^{2}}{{[B]}^{0}}\]
done
clear
D)
Rate\[=K{{[A]}^{2}}{{[B]}^{2}}\]
done
clear
View Answer play_arrow
The electronegativity follows the order
A)
\[F>O>Cl>Br\]
done
clear
B)
\[F>Cl>Br>O\]
done
clear
C)
\[O>F>Cl>Br\]
done
clear
D)
\[Cl>F>O>Br\]
done
clear
View Answer play_arrow
Which of the following is not formed when glycerol reacts with HI?
A)
\[C{{H}_{2}}=CH-C{{H}_{2}}I\]
done
clear
B)
\[C{{H}_{2}}(OH)-CH(I)-C{{H}_{2}}OH\]
done
clear
C)
\[C{{H}_{3}}-CH=C{{H}_{2}}\]
done
clear
D)
\[C{{H}_{3}}-CH(I)-C{{H}_{3}}\]
done
clear
View Answer play_arrow
The amine that does not react with acetyl chloride is
A)
\[C{{H}_{3}}N{{H}_{2}}\]
done
clear
B)
\[{{(C{{H}_{3}})}_{2}}NH\]
done
clear
C)
\[{{(C{{H}_{3}})}_{3}}N\]
done
clear
D)
None of these
done
clear
View Answer play_arrow
The plot shows the variation of \[-In\,\,{{K}_{p}}\] versus temperature for the two reactions. \[M(s)+\frac{1}{2}{{O}_{2}}(g)\to MO(s)\]and \[C(s)+\frac{1}{2}{{O}_{2}}(g)\to CO(s)\]
Identify the correct statement:
A)
At \[T\,\,<\,\,1200\,\,K,\] oxidation of carbon is unfavourable.
done
clear
B)
Oxidation of carbon is favourable at all temperatures.
done
clear
C)
At \[T\,\,<\,\,1200\,\,K,\] the reaction \[MO(s)+C(s)\to M(s)+CO(g)\] is spontaneous.
done
clear
D)
At \[12.08\times {{10}^{23}}\]carbon will reduce MO(s) to M(s).
done
clear
View Answer play_arrow
For preparing a buffer solution of pH 6 by mixing sodium acetate and acetic acid, the ratio of the concentration of salt and acid should be \[({{K}_{a}}={{10}^{-5}})\]
A)
1 : 10
done
clear
B)
10 : 1
done
clear
C)
100 : 1
done
clear
D)
1 : 100
done
clear
View Answer play_arrow
The activation energy for a hypothetical reaction, A \[\to \] Product, is 12.49 kcal/mole. If temperature is raised from 295 to 305, the rate of reaction increased by
A)
60%
done
clear
B)
100%
done
clear
C)
50%
done
clear
D)
20%
done
clear
View Answer play_arrow
\[BC{{l}_{3}}\] is a planar molecule whereas \[NC{{l}_{3}}\] is pyramidal because
A)
\[BC{{l}_{3}}\] has no lone pair of electrons but \[NC{{l}_{3}}\] has a lone pair of electrons.
done
clear
B)
\[B-Cl\] bond is more polar than \[N-Cl\] bond.
done
clear
C)
Nitrogen atom is smaller than boron atom.
done
clear
D)
\[N-Cl\] bond is more covalent than \[B-Cl\] bond.
done
clear
View Answer play_arrow
Indicate the wrongly named compound
A)
\[\underset{(4-methyl-1-pentanal)}{\mathop{C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-C{{H}_{2}}-C{{H}_{2}}-CHO}}\,\]
done
clear
B)
\[\underset{\text{(4}-\,\text{methyl}\,\,-\text{2}-\,\text{pentyn}\,\,-\text{1}-\,\text{oic}\,\,\text{acid)}}{\mathop{C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-C\equiv C-COOH}}\,\]
done
clear
C)
\[\underset{\text{(2}-\text{methyl}\,\,-1\,-\,\text{pentanoic}\,\,\text{acid)}}{\mathop{C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}\underset{\underset{C{{H}_{3}}}{\mathop{|}}\,}{\mathop{-\,CH-}}\,COOH}}\,\]
done
clear
D)
\[\underset{(3-\,\,\text{hexen}\,-5-\,\,\text{one})}{\mathop{C{{H}_{3}}-C{{H}_{2}}-CH=CH-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-C{{H}_{3}}}}\,\]
done
clear
View Answer play_arrow
An organic compound, \[{{C}_{3}}{{H}_{6}}O\] does not give a precipitate with 2, 4-dinitrophenyl-hydrazine reagent and does not react with metallic sodium. It could be
A)
\[C{{H}_{3}}-C{{H}_{2}}-CHO\]
done
clear
B)
\[C{{H}_{2}}=CH-C{{H}_{2}}OH\]
done
clear
C)
\[C{{H}_{3}}-CO-C{{H}_{3}}\]
done
clear
D)
\[C{{H}_{2}}=CH-O-C{{H}_{3}}\]
done
clear
View Answer play_arrow
Which one of the following pairs of molecules will have permanent dipole moments for both members?
A)
\[Si{{F}_{4}}\]and\[N{{O}_{2}}\]
done
clear
B)
\[N{{O}_{2}}\]and\[C{{O}_{2}}\]
done
clear
C)
\[N{{O}_{2}}\]and\[{{O}_{3}}\]
done
clear
D)
\[Si{{F}_{4}}\]and\[C{{O}_{2}}\]
done
clear
View Answer play_arrow
An element has bcc strucutre having unit cells \[12.08\times {{10}^{23}}.\]The number of atoms in these cells is
A)
\[12.08\times {{10}^{23}}\]
done
clear
B)
\[24.16\times {{10}^{23}}\]
done
clear
C)
\[48.38\times {{10}^{23}}\]
done
clear
D)
\[12.08\times {{10}^{22}}\]
done
clear
View Answer play_arrow
An unknown metal M displaces nickel from nickel (II) sulphate solution but does not displace manganese from manganese sulphate solution. Which order represents the correct order of reducing power?
A)
\[Mn>Ni>M\]
done
clear
B)
\[Ni>Mn>M\]
done
clear
C)
\[Mn>M>Ni\]
done
clear
D)
\[M>Ni>Mn\]
done
clear
View Answer play_arrow
From the following statements regarding \[{{H}_{2}}{{O}_{2}},\] choose the incorrect statement:
A)
It has to be stored in plastic or wax lined glass bottles in dark.
done
clear
B)
It has to be kept away from dust.
done
clear
C)
It can act only as an oxidizing agent.
done
clear
D)
It decomposes on exposure to light.
done
clear
View Answer play_arrow
Beilstein's test is given by which of the following:
A)
Halogens
done
clear
B)
Thiourea
done
clear
C)
Pyridine
done
clear
D)
All
done
clear
View Answer play_arrow
Complete hydrolysis of starch gives :
A)
Glucose only
done
clear
B)
Galactose and fructose in equimolar amounts
done
clear
C)
Glucose and'galactose in equimolar amounts
done
clear
D)
Glucose and fructose in equimolar amounts
done
clear
View Answer play_arrow
At STP, the order of root mean square speed of molecules \[{{H}_{2}},\]\[{{N}_{2}},\]\[{{O}_{2}}\] and HBr is
A)
\[{{H}_{2}}>{{N}_{2}}>{{O}_{2}}>HBr\]
done
clear
B)
\[HBr>{{O}_{2}}>{{N}_{2}}>{{H}_{2}}\]
done
clear
C)
\[HBr>{{H}_{2}}>{{O}_{2}}>{{N}_{2}}\]
done
clear
D)
\[{{N}_{2}}>{{O}_{2}}>{{H}_{2}}>HBr\]
done
clear
View Answer play_arrow
Which of the following is not true?
A)
Some disinfectants can be used as antispetics.
done
clear
B)
Sulphadiazine is a synthetic antibacterial.
done
clear
C)
Aspirin is analgesic as well as antipyretic.
done
clear
D)
Polystyrene is used to make non-stick cookware.
done
clear
View Answer play_arrow
A solution is prepared by mixing 8.5 g of \[C{{H}_{2}}C{{l}_{2}}\] and 11.95 g of \[CHC{{l}_{3}}.\] If vapour pressure of \[C{{H}_{2}}C{{l}_{2}}\] and \[CHC{{l}_{3}}\]at 298 K are 415 and 200 mmHg respectively, the mole fraction of \[CHC{{l}_{3}}\] in vapour form is: (Molar mass of Cl\[=35.5\,g\,mo{{l}^{-1}}\])
A)
0.162
done
clear
B)
0.675
done
clear
C)
0.325
done
clear
D)
0.486
done
clear
View Answer play_arrow
Match list I with list II and select the correct answer using the codes given below the lists:
List I List II I. Cyanide process A. Ultrapure Ge II. Floatation process B. Pine oil III. Electrolytic reduction C. Extraction of Al IV. Zone refining D. Extraction of Au
A)
I\[\to \]C, II\[\to \]A, III\[\to \]D, IV\[\to \]B
done
clear
B)
I\[\to \]D, II\[\to \]B, III\[\to \]C, IV\[\to \]A
done
clear
C)
I\[\to \]C, II\[\to \]B, III\[\to \]D, IV\[\to \]A
done
clear
D)
I\[\to \]D, II\[\to \]A, III\[\to \]C, IV\[\to \]B
done
clear
View Answer play_arrow
In which of the following, resonance will be possible?
A)
\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-CHO\]
done
clear
B)
\[C{{H}_{2}}=CH-CH=O\]
done
clear
C)
\[C{{H}_{3}}COC{{H}_{3}}\]
done
clear
D)
\[C{{H}_{2}}=CH-C{{H}_{2}}-CH=C{{H}_{2}}\]
done
clear
View Answer play_arrow
The radius of the second Bohr orbit for hydrogen atom is: (Plank's const. \[h=6.6262\times {{10}^{-34}}Js;\] mass of electron \[=9.1091\times {{10}^{-31}}kg;\] charge of electron \[e=1.60210\times {{10}^{-19}}C;\] permittivity of vaccum \[{{\in }_{0}}=8.854185\times {{10}^{-12}}k{{g}^{-1}}{{m}^{-3}}{{A}^{2}}\])
A)
\[1.65\overset{{}^\circ }{\mathop{A}}\,\]
done
clear
B)
\[4.76\overset{{}^\circ }{\mathop{A}}\,\]
done
clear
C)
\[0.529\overset{{}^\circ }{\mathop{A}}\,\]
done
clear
D)
\[2.12\overset{{}^\circ }{\mathop{A}}\,\]
done
clear
View Answer play_arrow
Point out the false statement
A)
Brownian movement and Tyndall effect are shown by colloidal systems.
done
clear
B)
Gold number is a measure of the protective power of a lyophillic colloid.
done
clear
C)
The colloidal solution of a liquid in liquid is called gel.
done
clear
D)
Hardy - Schuize rule is related with coagulation.
done
clear
View Answer play_arrow
The compound A on heating gives a colourless gas and a residue which dissolves in water to give B. When excess of \[C{{O}_{2}}\] is passed into B and gently heated, A is formed. The compound A is
A)
\[CaS{{O}_{4}}.2{{H}_{2}}O\]
done
clear
B)
\[N{{a}_{2}}C{{O}_{3}}\]
done
clear
C)
\[CaC{{O}_{3}}\]
done
clear
D)
\[{{K}_{2}}C{{O}_{3}}\]
done
clear
View Answer play_arrow
The value of the 'spin only' magnetic moment for one of the following configurations is 2.84 BM. The correct one is
A)
\[{{d}^{5}}\] (in strong ligand field)
done
clear
B)
\[{{d}^{3}}\] (in weak as well as in strong fields)
done
clear
C)
\[{{d}^{4}}\] (in weak ligand fields)
done
clear
D)
\[{{d}^{4}}\] (in strong ligand fields)
done
clear
View Answer play_arrow
\[{{N}_{2}}\] and \[{{O}_{2}}\] are converted into monoanions, \[N_{2}^{-}\] and \[O_{2}^{-}\] respectively Which of the following statements is wrong?
A)
In \[N_{2}^{-},\] \[N-N\] bond weakens
done
clear
B)
In \[O_{2}^{-},\]\[O-O\] bond order increases
done
clear
C)
In \[O_{2}^{-},\]\[O-O\] bond order decreases
done
clear
D)
\[N_{2}^{-}\] becomes paramagnetic
done
clear
View Answer play_arrow
The structure and hybridization of \[Si{{(C{{H}_{3}})}_{4}}\] is
A)
bent, \[sp\]
done
clear
B)
trigonal, \[s{{p}^{2}}\]
done
clear
C)
octahedral, \[s{{p}^{3}}d\]
done
clear
D)
tetrahedral, \[s{{p}^{3}}\]
done
clear
View Answer play_arrow
In a reaction \[A+BC+D,\] the initial concentrations, of A and B were \[0.9\,mol\,d{{m}^{-3}}\] each. At equilibrium the concentration of D was found to be \[0.6\,mol\,d{{m}^{-3}}.\] What is the value of equilibrium constant for the reaction
A)
8
done
clear
B)
4
done
clear
C)
9
done
clear
D)
3
done
clear
View Answer play_arrow
CsCl crystallises in body centered cubic lattice. If ?a? is its edge length then which of the following expressions is correct?
A)
\[{{r}_{Cs}}+{{r}_{C{{l}^{-}}}}=3a\]
done
clear
B)
\[{{r}_{Cs}}+{{r}_{C{{l}^{-}}}}=\frac{3a}{2}\]
done
clear
C)
\[{{r}_{Cs}}+{{r}_{C{{l}^{-}}}}=\frac{\sqrt{3}}{2}a\]
done
clear
D)
\[{{r}_{Cs}}+{{r}_{C{{l}^{-}}}}=\sqrt{3}a\]
done
clear
View Answer play_arrow
An ex ample of Perkin 's reaction is
A)
\[{{C}_{6}}{{H}_{5}}CHO+C{{H}_{3}}N{{O}_{2}}\]\[\xrightarrow{KOH}{{C}_{6}}{{H}_{5}}CHCHN{{O}_{2}}\]
done
clear
B)
\[{{C}_{6}}{{H}_{5}}CHO+{{(C{{H}_{3}}CO)}_{2}}O\]\[\xrightarrow{C{{H}_{3}}COONa}{{C}_{6}}{{H}_{5}}CH=CHCOOH\]
done
clear
C)
\[{{C}_{6}}{{H}_{5}}CHO+C{{H}_{3}}CHO\]\[\xrightarrow{NaOH}{{C}_{6}}{{H}_{5}}CH=CHCHO\]
done
clear
D)
\[{{C}_{6}}{{H}_{5}}CHO+C{{H}_{2}}{{(COOH)}_{2}}\]\[\xrightarrow{Alc.N{{H}_{3}}}{{C}_{6}}{{H}_{5}}CH=CHC{{O}_{2}}H\]
done
clear
View Answer play_arrow
The ether that undergoes electrophilic substitution reactions is
A)
\[C{{H}_{3}}O{{C}_{2}}{{H}_{5}}\]
done
clear
B)
\[{{C}_{6}}{{H}_{5}}OC{{H}_{3}}\]
done
clear
C)
\[C{{H}_{3}}OC{{H}_{3}}\]
done
clear
D)
\[{{C}_{2}}{{H}_{5}}O{{C}_{2}}{{H}_{5}}\]
done
clear
View Answer play_arrow
Classification of organisms based on evolutionary as well as genetic relationships is called
A)
Biosystematics
done
clear
B)
Phenetics
done
clear
C)
Numerical taxonomy
done
clear
D)
Cladistics
done
clear
View Answer play_arrow
In gymnosperms, the ovule is naked because
A)
ovary wall is absent
done
clear
B)
integuments are absent
done
clear
C)
perianth is absent
done
clear
D)
nucellus is absent
done
clear
View Answer play_arrow
Which one of the following have vessels as their characteristic feature?
A)
Angiosperms
done
clear
B)
Gymnosperms
done
clear
C)
Pteridophytes
done
clear
D)
Bryophytes
done
clear
View Answer play_arrow
Bacterial cells are often found in very hypotonic environments. Which of the following characteristics keeps them from continuing to take on water from their environment?
A)
The presence of a cell wall allows a buildup of turgor pressure that prevents any more water from entering the cell.
done
clear
B)
The presence of a cell wall allows a buildup of tonic pressure that prevents any more water from entering the cell.
done
clear
C)
The cell expels water as fast as it takes it up.
done
clear
D)
None of the above
done
clear
View Answer play_arrow
How many meiotic division would be required to produce 101 female gametophytes in an angiosperm?
A)
101
done
clear
B)
26
done
clear
C)
127
done
clear
D)
None of these
done
clear
View Answer play_arrow
In the choices below, which is not a correct pairing of a macronutrient and the major functions it performs in the life of a plant?
A)
potassium, enzyme activation, water balance, ion balance
done
clear
B)
calcium; activity of membranes and cytoskeleton, second messenger
done
clear
C)
sulfar; in proteins and coenzymes
done
clear
D)
iron; in active sites of many redox enzymes and electron carriers
done
clear
View Answer play_arrow
In \[{{C}_{4}}\] plants, agranal chloroplasts are found in
A)
mesophyll cells
done
clear
B)
epidermal cell chloroplasts of green stem
done
clear
C)
bundle sheath cells
done
clear
D)
chloroplasts of guard cells
done
clear
View Answer play_arrow
Out of 36 ATP molecules produced per glucose molecule during respiration
A)
2 are produced outside glycolysis and 34 during respiratory chain.
done
clear
B)
2 are produced outside mitochondria and 34 inside mitochondria.
done
clear
C)
2 during glycolysis and 34 during Krebs cycle.
done
clear
D)
all are formed inside mitochondria.
done
clear
View Answer play_arrow
Which of the following hormone prevents ripening of fruit?
A)
Gibberellin
done
clear
B)
Ethylene
done
clear
C)
Cytokinin
done
clear
D)
ABA
done
clear
View Answer play_arrow
Which one of the following represents an ovule, where the embryo sac becomes horse-shoe shaped and the funiculus and micropyle are close to each other?
A)
Amphitropous
done
clear
B)
Circinotropous
done
clear
C)
Atropous
done
clear
D)
Anatropous
done
clear
View Answer play_arrow
When the members of one population do not breed at the same time of the year as the members of another population it is called
A)
geographic isolation
done
clear
B)
sexual isolation
done
clear
C)
seasonal isolation
done
clear
D)
habitat isolation
done
clear
View Answer play_arrow
Diversity in the type of beaks of finches adapted to different feeding habits on the Galapagos Islands, as observed by Darwin, provides evidence' for
A)
Intraspecific variations
done
clear
B)
Intraspecific competition
done
clear
C)
Interspecific competition
done
clear
D)
Origin of species by natural selection
done
clear
View Answer play_arrow
DDT causes egg shell thinning in birds because it inhibits
A)
Calmodulin
done
clear
B)
Calcium ATPase
done
clear
C)
Magnesium ATPase
done
clear
D)
Carbonic anhydrase
done
clear
View Answer play_arrow
The first clinical, gene therapy was given for treating
A)
chicken pox
done
clear
B)
diabetes mellirus
done
clear
C)
rheumatoid arthritis
done
clear
D)
adenosine deaminase deficiency
done
clear
View Answer play_arrow
Taxonomic hierarchy refers to
A)
Step-wise arrangement of all categories for classification of plants and animals
done
clear
B)
A group of senior taxonomists who decide the nomenclature of plants and animals
done
clear
C)
A list of botanists or zoologists who have worked on taxonomy of a species or group
done
clear
D)
Classification of a species based on fossil record
done
clear
View Answer play_arrow
A group of fungi with septate mycelium in which sexual reproduction is either unknown or lacking are classified under
A)
phycomycetes
done
clear
B)
deuteromycetes
done
clear
C)
ascomycetes
done
clear
D)
basidiomycetes
done
clear
View Answer play_arrow
Oxysomes or \[{{F}_{0}}-{{F}_{1}}\] particles occur on
A)
thylakoids
done
clear
B)
mitochondrial surface
done
clear
C)
inner mitochondrial membrane
done
clear
D)
chloroplast surface
done
clear
View Answer play_arrow
Which of the following layer is present nearest of plasma membrane in plant cell?
A)
Secondary wall
done
clear
B)
Middle lamella
done
clear
C)
Primary wall
done
clear
D)
Tonoplast
done
clear
View Answer play_arrow
Iso-enzymes may be identified or separated by all the following characteristics, except:
A)
Electrophoretic mobility
done
clear
B)
Heat stability
done
clear
C)
Inhibitor specificity
done
clear
D)
Chemical reaction catalyzed
done
clear
View Answer play_arrow
The number of chromatids in a chromosome at anaphase is
A)
2 in mitosis and 1 in meiosis
done
clear
B)
1 in mitosis and 2 in meiosis
done
clear
C)
2 each in mitosis and meiosis
done
clear
D)
2 in mitosis and 4 in meiosis
done
clear
View Answer play_arrow
Plants die from prolonged water-logging because
A)
soil nutrients become very dilute.
done
clear
B)
root respiration stops.
done
clear
C)
cell sap in the plants becomes too dilute.
done
clear
D)
nutrients leach down due to excess water.
done
clear
View Answer play_arrow
Gibberellin was first extracted from
A)
Gibberella fujikuroi
done
clear
B)
Gelidium
done
clear
C)
Gracilaria
done
clear
D)
Aspergillus
done
clear
View Answer play_arrow
Which of the following bacteria is used for the production of butanol and acetone from starch?
A)
Lactobacillus bulgaricus
done
clear
B)
Clostridium acetobutylicum
done
clear
C)
Streptococcum thermophiles
done
clear
D)
Both ?a? and ?c?
done
clear
View Answer play_arrow
If an angiospermic male plant is diploid and female plant tetraploid, the ploidy level of endosperm will be
A)
haploid
done
clear
B)
triploid
done
clear
C)
tetraploid
done
clear
D)
pentaploid
done
clear
View Answer play_arrow
Species diversity increase as one proceeds from
A)
high altitude to low altitude and high latitude to low latitude
done
clear
B)
low altitude to high altitude and high latitude to low latitude
done
clear
C)
low altitude to high altitude and low latitude to high latitude
done
clear
D)
high altitude to low altitude and low latitude to high latitude
done
clear
View Answer play_arrow
Sacred groves are specially useful in
A)
preventing soil erosion.
done
clear
B)
year-round flow of water in rivers.
done
clear
C)
generating environmental awareness.
done
clear
D)
conserving rare and threatened species.
done
clear
View Answer play_arrow
Milky water of green coconut is
A)
liquid nucellus
done
clear
B)
liquid of female gametophyte
done
clear
C)
liquid endosperm
done
clear
D)
liquid embryo
done
clear
View Answer play_arrow
Which one of the following is the major difference between mosses and ferns?
A)
Ferns lack alternation of generation while mosses show the same.
done
clear
B)
Mosses are facultative aerobes while ferns are obligate aerobes.
done
clear
C)
Vascular bundles of ferns show xylem vessels while those of mosses lack it.
done
clear
D)
Sporophytes of ferns live much longer as compared to the Sporophytes of mosses.
done
clear
View Answer play_arrow
Red snow causing alga is
A)
Chlamydomonas nivalis
done
clear
B)
Chlamydomonas reinhardtii
done
clear
C)
Chlamydomonas debaryanum
done
clear
D)
Chalmydomonas media
done
clear
View Answer play_arrow
Which of the following statement (s) is/are incorrect?
(i) Calyx and corolla are reproductive organs of a flower. (ii) Zygomorphic flower can be divided into two equal radial halves in any radial plane. (iii) Flowers without bracts are termed as bracteate. (iv) Parthenocarpic fruit is formed after fertilization of the ovary. (v) In legumes, seed is non-endospermic. (vi) Radical buds develop on roots.
A)
(i), (ii), (iii) and (iv)
done
clear
B)
(i), (ii) and (v)
done
clear
C)
(iii), (iv) and (vi)
done
clear
D)
(i), (iv) and (v)
done
clear
View Answer play_arrow
What is true about t-RNA?
A)
It has five double stranded regions.
done
clear
B)
It binds with an amino acid at it 3? end.
done
clear
C)
It looks like clover leaf in the three dimensional structure.
done
clear
D)
It has a codon at one end which recognizes the anticodon on messenger RNA.
done
clear
View Answer play_arrow
Which of the following statements about nitrification is not true?
A)
Nitrobacter oxidizes nitrite to nitrate.
done
clear
B)
Nitrosomonas and Nitrosococcus convert ammonium ions to nitrite.
done
clear
C)
Nitrification reactions are energy-producing (exergonic) reactions.
done
clear
D)
Heterotrophic plants are more directly dependent on the nitrifying bacteria for usable nitrogen than autotrophic plants.
done
clear
View Answer play_arrow
Photorespiration is favoured by
A)
high \[{{O}_{2}}\] and low \[C{{O}_{2}}\]
done
clear
B)
low light and high \[{{O}_{2}}\]
done
clear
C)
low temperature and high\[{{O}_{2}}\]
done
clear
D)
low \[{{O}_{2}}\] and high \[C{{O}_{2}}\]
done
clear
View Answer play_arrow
Which of the following photosynthetic bacteria have both PS-I and PS-II?
A)
Green sulphur bacteria
done
clear
B)
Purple-sulphur bacteria
done
clear
C)
Purple non-sulphur bacteria
done
clear
D)
Cyanobacteria
done
clear
View Answer play_arrow
A plant completing its life cycle before the onset of dry condition is said to be
A)
short day plant
done
clear
B)
long day plant
done
clear
C)
drought escaping
done
clear
D)
All of these
done
clear
View Answer play_arrow
The graph shows the relation between light intensity and the giving off and taking up of carbon dioxide by the leaves of a plant. Why is most carbon dioxide given off when the light intensity is zero units?
A)
Because it is just the start of the experiment.
done
clear
B)
Only respiration is taking place at this intensity of light.
done
clear
C)
Only photosynthesis is taking place at this intensity of light.
done
clear
D)
The rate of photosynthesis is equivalent to the rate of respiration.
done
clear
View Answer play_arrow
Which one of the following statement is false?
(i) Epidermal cell has small amount of cytoplasm and a large vacuole. (ii) Waxy cuticle layer is absent in roots. (iii) Root hairs are unicellular, while stem hairs / trichomes are multicellular. (iv) Trichomes may be branched or unbranched, soft or stiff and prevent transpiration. (v) Guard cells are dumbell shadped in dicots and bean-shaped in monocots.
A)
(i) only
done
clear
B)
(iv)only
done
clear
C)
(iii) only
done
clear
D)
(v) only
done
clear
View Answer play_arrow
Find the correct match
A. Royal fern (i) Adiantum B. Marshy fern (ii) Osmunda C. Grape fern (iii) Marsilea D. Walking fern (iv) Botrychium
A)
A\[\to \](iv), B\[\to \](ii), C\[\to \](iii), D\[\to \](i)
done
clear
B)
A\[\to \](ii), B\[\to \](iii), C\[\to \](iv), D\[\to \](i)
done
clear
C)
A\[\to \](ii), B\[\to \](iii), C\[\to \](i), D\[\to \](iv)
done
clear
D)
A\[\to \](iii), B\[\to \](ii), C\[\to \](iv), D\[\to \](i)
done
clear
View Answer play_arrow
Which one of the following graphs most closely represents the relationship between the rate of transpiration of a mesophytic leaf and the atmospheric humidity?
A)
done
clear
B)
done
clear
C)
done
clear
D)
done
clear
View Answer play_arrow
Common indicator organism of water pollution is
A)
Lemna pancicostata
done
clear
B)
Eichhornia crassipes
done
clear
C)
Escherichia coli
done
clear
D)
Entamoeba histolytica
done
clear
View Answer play_arrow
Match the following
A. Succession (i) Tansley B. Ecosystem (ii) Mobius C. Biocoenosis (iii) Hult D. Acid Rain (iv) Robert Augus
A)
A\[\to \](iv), B\[\to \](i), C\[\to \](iii), D\[\to \](ii)
done
clear
B)
A\[\to \](ii), B\[\to \](i), C\[\to \](iii), D\[\to \](iv)
done
clear
C)
A\[\to \](ii), B\[\to \](i), C\[\to \](iv), D\[\to \](iii)
done
clear
D)
A\[\to \](iiii), B\[\to \](i), C\[\to \](ii), D\[\to \](iv)
done
clear
View Answer play_arrow
Biolisiics (gene-gun) is suitable for
A)
DNA finger printing.
done
clear
B)
Disarming pathogen vectors.
done
clear
C)
Transformation of plant cells.
done
clear
D)
Constructing recombinant DNA by joining with vectors.
done
clear
View Answer play_arrow
Read the following four statements (i - iv).
(i) In transcription, adenosine pairs with uracil. (ii) Regulation of lac operon by represser is referred to as positive regulation. (iii) The human genome has approximately 50,000 genes. (iv) Haemophilia is a sex-linked recessive disease. How many of the above statements are correct?
A)
Two
done
clear
B)
Three
done
clear
C)
Four
done
clear
D)
One
done
clear
View Answer play_arrow
The interaction is detrimental to both the species in
A)
Predation
done
clear
B)
Commensalism
done
clear
C)
Ammensalism
done
clear
D)
Competition
done
clear
View Answer play_arrow
Which option is true about heart wood/duramen?
(i) It does not help in water and mineral conduction. (ii) It is dark coloured but soft. (iii) It has tracheary elements filled with tannins, resins, gums, oil, etc. (iv) It is a peripheral part. (v) Sensitive to microbes and insects, hence least durable.
A)
(i) and (iii)
done
clear
B)
(ii) and (iii)
done
clear
C)
(iv) and (v)
done
clear
D)
(iii) and (iv)
done
clear
View Answer play_arrow
A few organisms are known to grow and multiply at temperatures of \[100-105{}^\circ .\] They belong to
A)
marine archaebacteria
done
clear
B)
thermophilic sulphur bacteria
done
clear
C)
blue-green algae (cyanobacteria)
done
clear
D)
thermophilic, subaerial fungi
done
clear
View Answer play_arrow
Archaeopteryx is connecting link between
A)
Reptiles and birds
done
clear
B)
Reptiles and mammals
done
clear
C)
Fishes and reptiles
done
clear
D)
Chordates and nonchordates
done
clear
View Answer play_arrow
The fibres of the following muscles are fusiform and do not show striations
A)
Skeletal muscles
done
clear
B)
Cardiac muscles
done
clear
C)
Both [a] and [b]
done
clear
D)
Smooth muscles
done
clear
View Answer play_arrow
Pancreatic cancer is an especially dangerous disease in people because the pancreas is
A)
the organ that produces and stores bile.
done
clear
B)
the site of synthesis for all of the essential amino acids.
done
clear
C)
one of the organs through which food must pass on its way to the colon.
done
clear
D)
an organ in which many different kinds of digestive enzymes are manufactured.
done
clear
View Answer play_arrow
Cholecystokinin is secretion of
A)
Duodenum that causes contraction of gall bladder
done
clear
B)
Goblet cells ofileum, stimulates secretion of succus entericus
done
clear
C)
Liver and controls secondary sex ch aracters
done
clear
D)
Stomach that stimulates pancreas to release juice
done
clear
View Answer play_arrow
The volume of air breathed in and out during normal breathing is called
A)
Vital capacity
done
clear
B)
Inspiratory reserve volume
done
clear
C)
Expiratory reserve volume
done
clear
D)
Tidal volume
done
clear
View Answer play_arrow
Solenocytes and metanephridia are excretory organs of
A)
Annelida and Arthropoda
done
clear
B)
Platyhelminthes and Annelida
done
clear
C)
Coelenterata and Mollusca
done
clear
D)
Aschelminthes and Annelida
done
clear
View Answer play_arrow
Atrial natriuretic factor (ANF) is released in response to the increase in blood volume and blood pressure. Which of the followings is not the function of ANF?
A)
Stimulates aldosterone secretion
done
clear
B)
Inhibits the release of renin from JGA
done
clear
C)
Stimulates salt loss in urine
done
clear
D)
Inhibits sodium reabsorption from collecting Duct
done
clear
View Answer play_arrow
Which of the following diseases is caused by the under secretion of cortisol?
A)
Anaemia
done
clear
B)
Addison's disease
done
clear
C)
Hyperglycemia
done
clear
D)
Mental illness or retardation
done
clear
View Answer play_arrow
Every time you eat a cookie or candy bar, your blood sugar increases. This triggers an increase in the hormone
A)
thyroxine
done
clear
B)
epinephrine
done
clear
C)
glucagon
done
clear
D)
insulin
done
clear
View Answer play_arrow
Which of the following sets represents vestigial organs?
A)
Vermiform appendix, body hair and patella
done
clear
B)
Wisdom teeth, body hair and atlas vertebra
done
clear
C)
Ear muscles, cochlea and coccyx
done
clear
D)
Vermi form appendix, ear muscles and coccyx
done
clear
View Answer play_arrow
Which of the following is found in the lymph nodes of a person battling a cold virus?
A)
Huge numbers of white blood cells
done
clear
B)
Trapped viruses that have been roaming the body
done
clear
C)
Lymph ducts that enter and exit the nodes
done
clear
D)
All of the above
done
clear
View Answer play_arrow
Which one of the following pairs of hormones are the examples of those that can easily pass through the cell membrane of the target cell and bind to a receptor inside it (Mostly in the nucleus)?
A)
Insulin, glucagon
done
clear
B)
Thyroxine, insulin
done
clear
C)
Somatostatin, oxytocin
done
clear
D)
Cortisol, testosterone
done
clear
View Answer play_arrow
Where do certain symbiotic micro-organisms normally occur in human body?
A)
Caecum
done
clear
B)
Oral lining and tongue surface
done
clear
C)
Vermiform appendix and rectum
done
clear
D)
Duodenum
done
clear
View Answer play_arrow
Minimum regeneration power is found in
A)
Blood
done
clear
B)
Epidermis
done
clear
C)
Nervous tissue
done
clear
D)
Muscular tissue
done
clear
View Answer play_arrow
Which of the following statements is/are not true?
(i) In Urochordata, notochord is present in larval tail. (ii) In Cephalochordata, notochord extends from head to tail region. (iii) Branchiostoma belongs to hemichordata. (iv) Only one class of living members, class Cyclostomata represents the super class Agnatha
A)
(ii) and (iv)
done
clear
B)
(i), (iii) and (iv)
done
clear
C)
(iii) only
done
clear
D)
(i) and (iv)
done
clear
View Answer play_arrow
Plectenchyma is tissue composed of:
A)
mycelial threads of fungi
done
clear
B)
tracheids of higher plants
done
clear
C)
aerenchyma
done
clear
D)
parenchyma
done
clear
View Answer play_arrow
If cardiac supply of vagus nerve is cut then
A)
Rate of heart beat increases
done
clear
B)
Rate of heart beat decreases
done
clear
C)
There is no change in heart beat
done
clear
D)
Heart stops beating
done
clear
View Answer play_arrow
Newly born child is more resistant to cold because of the presence of
A)
Thick dermis
done
clear
B)
Blubber
done
clear
C)
Brown fat
done
clear
D)
White fat
done
clear
View Answer play_arrow
Which part of the alimentary canal does not secrete any enzyme?
A)
Mouth
done
clear
B)
Oesophagus
done
clear
C)
Stomach
done
clear
D)
Duodenum
done
clear
View Answer play_arrow
The protein coated, water soluble fat globules are called
A)
Chylomicrons
done
clear
B)
Micelles
done
clear
C)
Chyle
done
clear
D)
Monoglycerides
done
clear
View Answer play_arrow
What would happen if human blood becomes acidic (low pH)?
A)
Oxygen carying capacity of haemoglob in increases
done
clear
B)
Oxygen carrying capacity of haemoglob in decreases
done
clear
C)
RBCs count increases
done
clear
D)
RBCs count decreases
done
clear
View Answer play_arrow
Which one of the following is a matching pair?
A)
Lubb-Sharp closure of AV valves at the beginning of ventricular systole
done
clear
B)
Dup-Sudden opening of semilunar valves at the beginning of ventricular diastole
done
clear
C)
Pulsation of the radial artery-Valves in the blood vessels
done
clear
D)
Initiation of the heart beat -Purkinje fibres
done
clear
View Answer play_arrow
Reabsorption of chloride ions from glomerular filtrate in kidney tubule occurs by
A)
Active transport
done
clear
B)
Diffusion
done
clear
C)
Osmosis
done
clear
D)
Brownian movement
done
clear
View Answer play_arrow
Ankle joint is
A)
Pivot Joint
done
clear
B)
Ball and socket joint
done
clear
C)
Hinge joint
done
clear
D)
Gliding joint
done
clear
View Answer play_arrow
Which muscle group contracts when the patellar ligament is struck with a hammer (knee reflex)?
A)
Biceps femoris
done
clear
B)
External obliques
done
clear
C)
Rectus abdominis
done
clear
D)
Quadriceps
done
clear
View Answer play_arrow
A decrease in the level of oestrogen and progesterone causes
A)
Growth and dilation ofmyometrium
done
clear
B)
Growth ofendometrium
done
clear
C)
Constriction of uterine blood vessels leading to sloughing of endometrium or uterine epithelium
done
clear
D)
Release of ovum from the ovary.
done
clear
View Answer play_arrow
Structure connecting the foetus to placenta is
A)
umbilical cord
done
clear
B)
amnion
done
clear
C)
yolk sac
done
clear
D)
chorion
done
clear
View Answer play_arrow
In India which of the following species of honey bee is reared in artificial hives?
A)
Apis indica
done
clear
B)
Apis dorsata
done
clear
C)
Apis florae
done
clear
D)
None of these
done
clear
View Answer play_arrow
A person entering an empty room suddenly finds a snake right in front on opening the door. Which one of the following is likely to happen in his neuro-hormonal control system?
A)
Sympathetic nervous system is activated releasing epinephrine and norepinephrine from adrenal medulla.
done
clear
B)
Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse.
done
clear
C)
Hypothalamus activates the parasympathetic division of brain.
done
clear
D)
Sympathetic nervous system is activated releasing epinephrine and norepinephrine from adrenal cortex
done
clear
View Answer play_arrow
Which one of the following pairs of chemical substances is correctly categorized?
A)
Calcitonin and thymosin - Thyroid hormones
done
clear
B)
Pepsin and prolactin - Two digestive enzymes secreted in stomach
done
clear
C)
Troponin and myosin - Complex proteins in striated muscles
done
clear
D)
Secretin and rhodopsin ? Polypeptide hormones
done
clear
View Answer play_arrow
Damage to the nerve connecting the saccule and utricle to the brain could result in
A)
loss of sense of taste
done
clear
B)
blindness
done
clear
C)
dizziness
done
clear
D)
loss of sense of smell
done
clear
View Answer play_arrow
The chemical substance found in the surface layer of cytoplasm of spermatozoa is:
A)
fertilizing
done
clear
B)
agglutinin
done
clear
C)
antifertilizin
done
clear
D)
hyaluronidase
done
clear
View Answer play_arrow
Read the following 4-statements and mark the option that has both correct statements
(i) MTP was legalized in 1971 (ii) Inability to conceive or produce children even after 2 years of unprotected sexual cohabitation is called infertility (iii) Surgical method of contraception prevents gamete formation (iv) MTPs are relatively safe up to 12 weeks of pregnancy
A)
(i) and (ii)
done
clear
B)
(ii) and (iii)
done
clear
C)
(iii) and (iv)
done
clear
D)
(i) and (iii)
done
clear
View Answer play_arrow
Erythroblastosis foetalis occurs when
A)
Mother is Rh negative and father is Rh positive
done
clear
B)
Father is Rh negative and mother is Rh positive
done
clear
C)
Both are Rh positive
done
clear
D)
Both are Rh negative
done
clear
View Answer play_arrow
Which of the following organisms is capable of producing gametes containing different sex chromosomes?
A)
Male butterfuly
done
clear
B)
Human male
done
clear
C)
Human female
done
clear
D)
Male bird
done
clear
View Answer play_arrow
Tadpoles of frog can be made to grow as giant sized tadpoles, if they are
A)
administered antithyroid substance like thiourea
done
clear
B)
administered large amounts ofthyroxine
done
clear
C)
reared on a diet rich in egg yolk
done
clear
D)
reared on a diet rich in both egg yolk and glucose
done
clear
View Answer play_arrow
In myopia or short sightedness
A)
Image is formed slightly in front of retina because eye ball is longer.
done
clear
B)
Eye ball is normal but image is formed over blind spot.
done
clear
C)
Eye ball is normal but images is formed slightly behind the retina due to faulty lens.
done
clear
D)
Curvature of cornea becomes irregular.
done
clear
View Answer play_arrow
Sequence of meninges from inner to outside is
A)
Duramater - Arachnoid ? Piamater
done
clear
B)
Duramater - Piamater ? Arachnoid
done
clear
C)
Arachnoid - Duramater ? Piamater
done
clear
D)
Piamater - Arachnoid - Duramater
done
clear
View Answer play_arrow
Which hormone-bone cell combination may result in osteoporosis?
A)
adrenal cortisol-osteoclast
done
clear
B)
estrogen-osteoblast
done
clear
C)
thyroid hormone-osteoclast
done
clear
D)
thyrocalcitonin-osteoblast
done
clear
View Answer play_arrow
Joint between bones of human skull is
A)
Htnge joint
done
clear
B)
Synovial joint
done
clear
C)
Cartilaginous joint
done
clear
D)
Fibrous joint
done
clear
View Answer play_arrow
Which one of the following is the correct description of a certain part of the normal human skeleton?
A)
Parietal bone and the temporal bone of the skull are joined by fibrous joint.
done
clear
B)
First vertebra is axis which articulates with the occipital condyles.
done
clear
C)
The \[{{9}^{th}}\] and \[{{10}^{th}}\] pairs of ribs are called the floating ribs.
done
clear
D)
Glenoid cavity is a depression to which the thigh bone articulates.
done
clear
View Answer play_arrow
Metanephric kidneys are found in
A)
Reptiles only
done
clear
B)
Birds only
done
clear
C)
mammals only
done
clear
D)
All of these
done
clear
View Answer play_arrow
Which of the following set of animals has an incomplete double circulation system?
A)
Frog and crocodile
done
clear
B)
Shark and whale
done
clear
C)
Lizard and pigeon
done
clear
D)
Toad and lizard
done
clear
View Answer play_arrow
Look at the following pedigree chart. On what basis the trait represented by the solid symbols in the pedigree below cannot be explained ?
(i) A dominant sex linked gene (ii) A recessive sex linked gene (iii) A holandric gene (iv) A sex limited autosomal dominant (v) A sex limited autosomal recessive (vi) A sex influenced autosonal gene dominat in males (vii) A sex influenced autosomal gene recessive in males
A)
(i), (ii), (iv) and (vii)
done
clear
B)
(i), (iii) and (vii)
done
clear
C)
(ii), (iv) and (vi)
done
clear
D)
(i), (iii), (v) and (vii)
done
clear
View Answer play_arrow