A body of mass 2 kg has an initial speed of 5 m/s. A force acts on it for some time in the direction of motion. The force-time graph is shown in figure. The final speed of body is
A)
9.25 m/s.
done
clear
B)
5 m/s.
done
clear
C)
14.31 m/s.
done
clear
D)
4.25 m/s.
done
clear
View Answer play_arrow
Find the force needed to hold the wedge in equilibrium, if there is no friction
A)
\[\frac{mg}{\cos \theta }\]
done
clear
B)
\[mg\,\sin \theta \]
done
clear
C)
\[mg{{\sin }^{2}}\theta \]
done
clear
D)
\[mg\cos \theta \sin \theta \]
done
clear
View Answer play_arrow
A plane flying horizontally at a height of 1500 meters with a speed of 200 meter/second passes directly over an aircraft gun. Then the angle with the horizontal at which the shell should be fired from the gun with a muzzle velocity of 400 meters per second to hit the plane is:
A)
\[90{}^\circ \]
done
clear
B)
\[60{}^\circ \]
done
clear
C)
\[30{}^\circ \]
done
clear
D)
\[45{}^\circ \]
done
clear
View Answer play_arrow
A boat crosses a river from point A to point B, which are on opposite sides. The speed of water is v and that of boat is \[{{v}_{w}}\]relative to still water. Assume\[{{v}_{B}}=2{{v}_{w}}.\]What is the time taken by the boat to cross the river, if the width of the river is D
A)
\[\frac{2D}{{{v}_{B}}\sqrt{3}}\]
done
clear
B)
\[\frac{\sqrt{3}D}{2{{v}_{B}}}\]
done
clear
C)
\[\frac{D}{{{v}_{B}}\sqrt{2}}\]
done
clear
D)
\[\frac{D\sqrt{2}}{{{v}_{B}}}\]
done
clear
View Answer play_arrow
The angle between-two vectors \[\vec{A}\]and \[\vec{B}\]is \[\theta \]and their resultant makes an angle \[\frac{\theta }{2}\] with \[\vec{A}.\]Which of the following is true?
A)
A = 2B
done
clear
B)
\[A=\frac{B}{2}\]
done
clear
C)
A = B
done
clear
D)
AB = 1
done
clear
View Answer play_arrow
A plane is inclined at an angle of \[30{}^\circ \] with the horizontal. The component \[\vec{A}-10\hat{k}\] perpendicular to the plane is (here z-direction is vertically upwards)
A)
\[5\sqrt{2}\]
done
clear
B)
\[5\sqrt{3}\]
done
clear
C)
5
done
clear
D)
2.5
done
clear
View Answer play_arrow
The position of a body along \[x-\]axis depends on time as \[\sqrt{x}=t+1.\]Then the speed of the body
A)
Increases with time
done
clear
B)
Decreases with time
done
clear
C)
Is independent of time
done
clear
D)
None of these
done
clear
View Answer play_arrow
A particle starts from rest. The variation of its acceleration (a) with time (f) is as shown in figure. Then choose the correct statement.
A)
Velocity at \[t=8s\]is\[27\,m/s\]
done
clear
B)
Velocity is maximum at \[t=8s\]
done
clear
C)
Velocity at t = 12 is 20 m/s
done
clear
D)
All of the above.
done
clear
View Answer play_arrow
Find the potential difference across the capacitor in the circuit shown in the figure if the capacitance of the capacitor is \[3\mu F.\]
A)
5.5 V
done
clear
B)
6.0 V
done
clear
C)
6.5 V
done
clear
D)
7.0 V
done
clear
View Answer play_arrow
Two coils A and B having turns 300 and 600 respectively are placed near each other. On passing a current of 3.0 ampere in A, the flux linked with A is \[1.2\times {{10}^{-4}}\] Wb and with B it is \[9.0\times {{10}^{-5}}\]Wb. The mutual inductance of the system is:
A)
\[4\times {{10}^{-5}}H\]
done
clear
B)
\[3\times {{10}^{-5}}H\]
done
clear
C)
\[2\times {{10}^{-5}}H\]
done
clear
D)
\[1.8\times {{10}^{-2}}H\]
done
clear
View Answer play_arrow
Two conducting rings P and Q of radius r and 3r move in opposite directions with velocities 2v and v, respectively on a conducting surface S. There is a uniform magnetic field of magnitude B perpendicular to the plane of the rings. The potential difference between the highest points of the two rings is
A)
0
done
clear
B)
2Brv
done
clear
C)
6Brv
done
clear
D)
10Brv
done
clear
View Answer play_arrow
In the Young's double slit experiment, the intensity on the screen at a point where path difference is\[\lambda \] is K. What will be the intensity at the point where path difference is\[(\lambda /4)?\]
A)
\[\frac{K}{4}\]
done
clear
B)
\[\frac{K}{2}\]
done
clear
C)
K
done
clear
D)
0
done
clear
View Answer play_arrow
An induction coil has an impedance of \[10\Omega .\]When an AC signal of frequency 1000 Hz is applied to the coil, the voltage leads the current by \[45{}^\circ \]. The inductance of the coil is
A)
\[\frac{1}{20\pi }\]
done
clear
B)
\[\frac{1}{\sqrt{2}\times 200\pi }\]
done
clear
C)
\[\frac{1}{\sqrt{2}\times 20\pi }\]
done
clear
D)
\[\frac{1}{200\pi }\]
done
clear
View Answer play_arrow
Two electrons are moving with the same speed v. One electron enters a region of uniform electric field while the other enters a region of uniform magnetic field. Then after some time, if the be-Broglie wavelengths of the two are \[{{\lambda }_{1}}\]and A\[{{\lambda }_{2}},\]then
A)
\[{{\lambda }_{1}}={{\lambda }_{2}}\]
done
clear
B)
\[{{\lambda }_{1}}>{{\lambda }_{2}}\]
done
clear
C)
\[{{\lambda }_{1}}<{{\lambda }_{2}}\]
done
clear
D)
\[{{\lambda }_{1}}<{{\lambda }_{2}}\]or\[{{\lambda }_{2}}<{{\lambda }_{1}}\]
done
clear
View Answer play_arrow
What are the dimensions of electrical resistance?
A)
\[M{{L}^{2}}{{T}^{-2}}{{A}^{2}}\]
done
clear
B)
\[M{{L}^{2}}{{T}^{-2}}{{A}^{-2}}\]
done
clear
C)
\[M{{L}^{2}}{{T}^{-2}}{{A}^{2}}\]
done
clear
D)
\[M{{L}^{2}}{{T}^{-2}}{{A}^{-2}}\]
done
clear
View Answer play_arrow
A double convex lens of focal length 6 cm is made of glass of refractive index 1.5. The radius of curvature of one surface is double that of the other surface. The value of smaller radius of curvature is:
A)
6 cm
done
clear
B)
4.5 cm
done
clear
C)
9 cm
done
clear
D)
4 cm
done
clear
View Answer play_arrow
A long string with a charge A per unit length passes through an imaginary cube of edge a. The maximum flux of the electric field through the cube will be
A)
\[\frac{\lambda a}{{{\varepsilon }_{0}}}\]
done
clear
B)
\[\frac{\sqrt{2}\lambda a}{{{\varepsilon }_{0}}}\]
done
clear
C)
\[\frac{6\lambda {{a}^{2}}}{{{\varepsilon }_{0}}}\]
done
clear
D)
\[\frac{\sqrt{3}\lambda a}{{{\varepsilon }_{0}}}\]
done
clear
View Answer play_arrow
A proton, a deuteron and an \[\alpha \] particle having the same kinetic energy are moving in circular trajectories in a constant magnetic field. If \[{{r}_{p}},{{r}_{d}}\]and\[{{r}_{a}}\]denote respectively the radii of the trajectories of these particles, then
A)
\[{{r}_{a}}={{r}_{P}}<{{r}_{d}}\]
done
clear
B)
\[{{r}_{a}}>{{r}_{d}}<{{r}_{P}}\]
done
clear
C)
\[{{r}_{a}}={{r}_{d}}>{{r}_{P}}\]
done
clear
D)
\[{{r}_{P}}={{r}_{d}}<{{r}_{a}}\]
done
clear
View Answer play_arrow
In the figure ammeter \[{{A}_{1}}\]reads a current of 10mA, while the voltmeter reads a potential difference of 3 V What does ammeter \[{{A}_{2}}\]in mA read? The am- meters are identical, the internal resistance of the battery is negligible. (Consider all ammeters and voltmeters as non-ideal.)
A)
6.57 mA
done
clear
B)
3.12 mA
done
clear
C)
1.12 mA
done
clear
D)
5.14 mA
done
clear
View Answer play_arrow
The focal lengths of the objective and eye-piece of a microscope are 1 cm and 5 cm respectively. If the magnifying power for the normal adjustment is -45, the length of the tube is (Least distance of clear vision = 25 cm)
A)
23 cm
done
clear
B)
25 cm
done
clear
C)
15 cm
done
clear
D)
13 cm
done
clear
View Answer play_arrow
A stationary hydrogen atom emits a photon corresponding to the first line of Lymen series. If R is the Rydberg's constant, what velocity does the atom acquire if its mass is M
A)
\[\frac{3Rh}{4\,M}\]
done
clear
B)
\[\frac{Rh}{4\,M}\]
done
clear
C)
\[\frac{Rh}{2\,M}\]
done
clear
D)
\[\frac{Rh}{\,M}\]
done
clear
View Answer play_arrow
A spherical hollow cavity is made in a lead sphere of radius R, such that its surface touches the outside surface of the lead sphere and passes through the center. What is the shift in the center of mass of the lead sphere due to hollowing?
A)
\[\frac{R}{7}\]
done
clear
B)
\[\frac{R}{14}\]
done
clear
C)
\[\frac{R}{2}\]
done
clear
D)
\[R\]
done
clear
View Answer play_arrow
A smooth uniform rod of length L and mass M has two identical beads of negligible size, each of mass m, which can slide freely along the rod. Initially, the two beads are at the center of the rod and the system is rotating with angular velocity\[{{\omega }_{0}}\]about an axis perpendicular to rod passing through the midpoint of the rod. There are no external forces. When the beads reach the ends of the rod the angular velocity of the system is:
A)
\[\frac{M{{\omega }_{0}}}{M+3m}\]
done
clear
B)
\[\frac{M{{\omega }_{0}}}{M+6m}\]
done
clear
C)
\[\frac{M+6m}{M}{{\omega }_{0}}\]
done
clear
D)
\[{{\omega }_{0}}\]
done
clear
View Answer play_arrow
An annular ring with inner and outer radii \[{{R}_{1}}\] and\[{{R}_{2}}\]is rolling without slipping with a uniform angular speed. The ratio of the forces experienced by the two particles situated on the inner and outer parts F of the ring, \[\frac{{{F}_{1}}}{{{F}_{2}}}\]is
A)
1
done
clear
B)
\[\frac{{{R}_{1}}}{{{R}_{2}}}\]
done
clear
C)
\[\frac{{{R}_{2}}}{{{R}_{1}}}\]
done
clear
D)
\[{{\left( \frac{{{R}_{1}}}{{{R}_{2}}} \right)}^{2}}\]
done
clear
View Answer play_arrow
A body having moment of inertia about its axis of rotation equal to \[3\text{ }kg-{{m}^{2}}\]is rotating with angular velocity equal to 3 rad/s. Kinetic energy of this rotating body is the same as that of body of mass 27 kg moving with a speed of
A)
1.0 m/s
done
clear
B)
0.5 m/s
done
clear
C)
1.5 m/s
done
clear
D)
2.0 m/s
done
clear
View Answer play_arrow
System shown in the figure is released from rest. Pulley and spring are massless and friction is absent everywhere. The speed of 5 kg block when 2 kg block leaves the contact with ground is (Take force constant of spring K = 40 N/m and\[g\text{ }=\text{ }10\text{ }m/{{s}^{2}}\])
A)
\[\sqrt{2}\,m/s\]
done
clear
B)
\[2\sqrt{2}\,m/s\]
done
clear
C)
\[2\,m/s\]
done
clear
D)
\[4\sqrt{2}\,m/s\]
done
clear
View Answer play_arrow
The potential difference between A and B in the following situation is
A)
12 V
done
clear
B)
7 V
done
clear
C)
20 V
done
clear
D)
14 V
done
clear
View Answer play_arrow
A 1.5 kg block is initially at rest on a horizontal frictionless surface when a horizontal force in the positive direction of \[x-\]axis is applied to the block. he force is given by \[\vec{F}=(4-{{x}^{2}})\hat{i}\,N,\]where \[x\]is in meter and the initial position of the block is \[x=0.\]The maximum kinetic energy of the block between\[x=0\]and\[x=2.0\] m is
A)
2.33 J
done
clear
B)
8.67 J
done
clear
C)
5.33 J
done
clear
D)
6.67 J
done
clear
View Answer play_arrow
The human eye can barely detect yellow light (6000 A) that delivers\[1.7\times {{10}^{-18}}\]watt to the retina. Nearly how many photons per second does the retina receive?
A)
50
done
clear
B)
5
done
clear
C)
500
done
clear
D)
More than 5 million
done
clear
View Answer play_arrow
The angular momentum of an electron in a hydrogen atom is proportional to:
A)
\[\frac{1}{\sqrt{r}}\]
done
clear
B)
\[\frac{1}{r}\]
done
clear
C)
\[\sqrt{r}\]
done
clear
D)
\[{{r}^{2}}\]
done
clear
View Answer play_arrow
The wavelength of the first line in Balmer series in the hydrogen spectrum is \[\lambda .\]What is the wavelength of the second line.
A)
\[\frac{20\lambda }{27}\]
done
clear
B)
\[\frac{3\lambda }{16}\]
done
clear
C)
\[\frac{5\lambda }{36}\]
done
clear
D)
\[\frac{3\lambda }{4}\]
done
clear
View Answer play_arrow
The wavelength of the characteristic .Y-ray \[{{K}_{\alpha }}\]line emitted by a hydrogen-like element is 0.32A. The wavelength of K line emitted by the same element will be:
A)
\[0.24\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
clear
B)
\[0.27\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
clear
C)
\[0.32\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
clear
D)
\[0.48\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
done
clear
View Answer play_arrow
Plutonium has atomic mass 210 and a decay constant equal to \[5.8\times {{10}^{-8}}{{\sec }^{-1}}.\] The number of a-particles emitted per second by 1 mg is: (Avogadro's constant\[=6.0\times {{10}^{-23}}\])
A)
\[1.7\times {{10}^{9}}\]
done
clear
B)
\[1.7\times {{10}^{11}}\]
done
clear
C)
\[2.9\times {{10}^{11}}\]
done
clear
D)
\[3.4\times {{10}^{9}}\]
done
clear
View Answer play_arrow
A nucleus disintegrates into two nuclear parts which have their velocities in the ratio 2:1. The ratio of their nuclear sizes will be:
A)
\[{{2}^{\frac{1}{3}}}:1\]
done
clear
B)
\[1:{{3}^{\frac{1}{2}}}\]
done
clear
C)
\[{{3}^{\frac{1}{3}}}:1\]
done
clear
D)
\[1:{{2}^{\frac{1}{3}}}\]
done
clear
View Answer play_arrow
A \[\gamma -\]ray photon produces an electron-positron pair, each moving with a K.E of 0.01 MeV The energy of the\[\gamma -\]ray photon is
A)
1.02 MeV
done
clear
B)
1.04 MeV
done
clear
C)
2.08 MeV
done
clear
D)
1.03 MeV
done
clear
View Answer play_arrow
Two circular coils P and Q are made from similar wires but the radius of Q is twice that of P. What should be the value of potential difference across them so that the magnetic field at their centers may be the same?
A)
\[{{V}_{q}}=2{{V}_{p}}\]
done
clear
B)
\[{{V}_{q}}=3{{V}_{p}}\]
done
clear
C)
\[{{V}_{q}}=4{{V}_{p}}\]
done
clear
D)
\[{{V}_{q}}=\left( \frac{1}{4} \right){{V}_{p}}\]
done
clear
View Answer play_arrow
A force \[\vec{F}=6\hat{i}+2\hat{j}-3\hat{k}\]acts on a particle and produces a displacement of \[\vec{s}=2\hat{i}-3\hat{j}+x\hat{k}.\]If the work done is zero, the value of \[x\]is:
A)
\[-2\]
done
clear
B)
\[\frac{1}{2}\]
done
clear
C)
6
done
clear
D)
2
done
clear
View Answer play_arrow
A particle moves in a straight line with retardation proportional to its is placement. Its loss of kinetic energy for any displacement \[x\] is proportional to
A)
\[{{x}^{2}}\]
done
clear
B)
\[{{e}^{x}}\]
done
clear
C)
\[x\]
done
clear
D)
\[{{\log }_{e}}x\]
done
clear
View Answer play_arrow
From an automatic gun a man fires 360 bullets per minute with a speed of 360 km/hour. If each weighs 20 g, the power of the gun is
A)
600 W
done
clear
B)
300 W
done
clear
C)
150 W
done
clear
D)
75 W
done
clear
View Answer play_arrow
A cannon ball is fired with a velocity 200 m/sec at an angle of \[60{}^\circ \] with the horizontal. At the highest point of its flight it explodes into 3 equal fragments, one going vertically upwards with a velocity 100 m/sec, the second one falling vertically downwards with a velocity 100 m/sec. The third fragment will be moving with a velocity
A)
100 m/s in the horizontal direction
done
clear
B)
300 m/s in the horizontal direction
done
clear
C)
300 m/s in a direction making an angle of \[60{}^\circ \] with the horizontal
done
clear
D)
200 m/s in a direction making an angle of \[60{}^\circ \] with the horizontal
done
clear
View Answer play_arrow
The potential energy of a particle varies with distance\[x\]as shown in the graph the force acting on the particle is zero at
A)
C
done
clear
B)
B
done
clear
C)
B and C
done
clear
D)
A and D
done
clear
View Answer play_arrow
The work done for the cycle shown in given figure will be
A)
45 J
done
clear
B)
54 J
done
clear
C)
22.5 J
done
clear
D)
32.5 J
done
clear
View Answer play_arrow
The temperature-energy diagram of a reversible engine cycle is given in the figure. Its efficiency is:
A)
\[\frac{1}{2}\]
done
clear
B)
\[\frac{1}{4}\]
done
clear
C)
\[\frac{1}{3}\]
done
clear
D)
\[\frac{2}{3}\]
done
clear
View Answer play_arrow
A speech signal of 3 kHz is used to modulate a carrier signal of frequency 1 MHz, using amplitude modulation. The frequencies of the side bands will be
A)
1.003 MHz and 0.997 MHz
done
clear
B)
3001 kHz and 2997 kHz
done
clear
C)
1003 kHz and 1000 kHz
done
clear
D)
1 MHz and 0.997 MHz
done
clear
View Answer play_arrow
The width of depletion region in p-n junction diode is 500 nm and an internal electric field of \[6\times {{10}^{5}}\,V{{m}^{-1}}\]is also found to exist in it. What is the kinetic energy which a conduction electron must have in order to diffuse from the \[n-\]side to \[p-\]side?
A)
0.03 eV
done
clear
B)
0.30 eV
done
clear
C)
0.45 eV
done
clear
D)
0.60 eV
done
clear
View Answer play_arrow
Which of the following is a sulphide ore?
A)
Calamine
done
clear
B)
Cryolite
done
clear
C)
Zinc blende
done
clear
D)
Haematite
done
clear
View Answer play_arrow
Which of the following ions is colorless in its aqueous solution?
A)
\[T{{i}^{3+}}\]
done
clear
B)
\[C{{u}^{2+}}\]
done
clear
C)
\[N{{i}^{2+}}\]
done
clear
D)
\[Z{{n}^{2+}}\]
done
clear
View Answer play_arrow
Which of the following is the strongest oxidizing agent?
A)
\[{{F}_{2}}\]
done
clear
B)
\[C{{u}^{2+}}\]
done
clear
C)
\[B{{r}_{2}}\]
done
clear
D)
\[{{I}_{2}}\]
done
clear
View Answer play_arrow
Which of the following has the lowest bond angle?
A)
\[{{H}_{2}}O\]
done
clear
B)
\[C{{H}_{4}}\]
done
clear
C)
\[{{H}_{2}}S\]
done
clear
D)
\[N{{H}_{3}}\]
done
clear
View Answer play_arrow
What is the catalyst used in the manufacture of sulphuric acid by contact process?
A)
Ni powder
done
clear
B)
Platinized asbestos
done
clear
C)
Anhydrous \[A{{l}_{2}}{{O}_{3}}\]
done
clear
D)
Al powder
done
clear
View Answer play_arrow
A solid organic compound Y on heating is converted to vapour state directly, which on cooling solidifies. Which of the following is the correct method of purifying Y?
A)
Sublimation
done
clear
B)
Distillation
done
clear
C)
Distillation at reduced pressure
done
clear
D)
Steam distillation
done
clear
View Answer play_arrow
Chloroethane reacts with magnesium in dry ether to form X. When X is hydro lysed, a carbon compound Y and Z are formed. Which of the following is Y?
A)
\[{{C}_{2}}{{H}_{4}}\]
done
clear
B)
\[{{C}_{2}}{{H}_{2}}\]
done
clear
C)
\[{{C}_{2}}{{H}_{6}}\]
done
clear
D)
\[{{C}_{6}}{{H}_{6}}\]
done
clear
View Answer play_arrow
Ethylene is reacted with \[B{{r}_{2}}/CC{{l}_{4}}\]to form X. When X is reacted with alcoholic KOH. Y is formed. X and Y respectively are:
A)
\[BrC{{H}_{2}}-C{{H}_{2}}Br\]and\[{{C}_{2}}{{H}_{2}}\]
done
clear
B)
\[{{C}_{2}}{{H}_{5}}\]and\[{{C}_{6}}{{H}_{6}}\]
done
clear
C)
\[{{C}_{2}}{{H}_{5}}Br\]and\[{{C}_{2}}{{H}_{6}}\]
done
clear
D)
\[{{C}_{2}}{{H}_{3}}B{{r}_{3}}\]and\[{{C}_{2}}{{H}_{4}}\]
done
clear
View Answer play_arrow
Which of the following reacts with ammoniacal cuprous chloride?
A)
\[C{{H}_{4}}\]
done
clear
B)
\[{{C}_{2}}{{H}_{2}}\]
done
clear
C)
\[{{C}_{6}}{{H}_{6}}\]
done
clear
D)
\[{{C}_{2}}{{H}_{6}}\]
done
clear
View Answer play_arrow
Which of the following hydrocarbon has the least carbon-carbon bond length?
A)
\[{{C}_{2}}{{H}_{2}}\]
done
clear
B)
\[{{C}_{6}}{{H}_{6}}\]
done
clear
C)
\[{{C}_{2}}{{H}_{4}}\]
done
clear
D)
\[{{C}_{2}}{{H}_{6}}\]
done
clear
View Answer play_arrow
Which of the following reacts with water to give ethane?
A)
\[{{C}_{2}}{{H}_{5}}OH\]
done
clear
B)
\[C{{H}_{4}}\]
done
clear
C)
\[{{C}_{2}}{{H}_{5}}MgBr\]
done
clear
D)
\[{{C}_{2}}{{H}_{5}}O{{C}_{2}}{{H}_{5}}\]
done
clear
View Answer play_arrow
Which of the following reacts with \[BC{{l}_{3}}\]to form diborane?
A)
\[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\]
done
clear
B)
\[N{{H}_{3}}\]
done
clear
C)
\[NaHg\]
done
clear
D)
\[LiAl{{H}_{4}}\]
done
clear
View Answer play_arrow
During the Serpeck's process. Silica is eliminated as
A)
Si (solid)
done
clear
B)
Si (vapour)
done
clear
C)
\[Si{{O}_{2}}\](vapour)
done
clear
D)
\[Si{{O}_{2}}\](vapour)
done
clear
View Answer play_arrow
Which of the following is an acid?
A)
\[P{{(OH)}_{3}}\]
done
clear
B)
\[NaOH\]
done
clear
C)
\[N{{H}_{4}}OH\]
done
clear
D)
\[Ca{{(OH)}_{2}}\]
done
clear
View Answer play_arrow
What is the molecular formula of gypsum?
A)
\[CaS{{O}_{4}}.2{{H}_{2}}O\]
done
clear
B)
\[CaS{{O}_{4}}.3{{H}_{2}}O\]
done
clear
C)
\[CaS{{O}_{4}}.{{H}_{2}}O\]
done
clear
D)
\[2CaS{{O}_{4}}.{{H}_{2}}O\]
done
clear
View Answer play_arrow
In which of the following reactions. Hydrogen peroxide acts as a reducing agent?
A)
\[2KI+{{H}_{2}}{{O}_{2}}+{{H}_{2}}S{{O}_{4}}\to {{K}_{2}}S{{O}_{4}}+{{I}_{2}}+{{H}_{2}}O\]
done
clear
B)
\[A{{g}_{2}}O(moist)+{{H}_{2}}{{O}_{2}}\to 2Ag+{{H}_{2}}O+{{O}_{2}}\]
done
clear
C)
\[N{{a}_{2}}S{{O}_{3}}+{{H}_{2}}{{O}_{2}}\to N{{a}_{2}}S{{O}_{4}}+{{H}_{2}}O\]
done
clear
D)
\[PbS+4{{H}_{2}}{{O}_{2}}\to PbS{{O}_{4}}+4{{H}_{2}}O\]
done
clear
View Answer play_arrow
Which one of the sixth group elements has the highest catenation power?
A)
0
done
clear
B)
S
done
clear
C)
Se
done
clear
D)
Te
done
clear
View Answer play_arrow
Which of the following has the highest first ionization potential?
A)
P
done
clear
B)
K
done
clear
C)
Al
done
clear
D)
Si
done
clear
View Answer play_arrow
Which of the following converts acetic acid to acetyl chloride?
A)
\[C{{l}_{2}}/P\]
done
clear
B)
\[HCl\]
done
clear
C)
\[NaCl\]
done
clear
D)
\[PC{{l}_{3}}\]
done
clear
View Answer play_arrow
Nitrobenzene on reduction with \[Sn/HCl\] gives A which on reaction with acetyl chloride forms B. Which of the following is B?
A)
\[{{C}_{6}}{{H}_{5}}NHCl\]
done
clear
B)
\[{{C}_{6}}{{H}_{5}}-O-C-\overset{\text{O}}{\mathop{\overset{||}{\mathop{C}}\,}}\,{{H}_{3}}\]
done
clear
C)
\[{{C}_{6}}{{H}_{5}}-NH-\overset{\text{O}}{\mathop{\overset{||}{\mathop{C}}\,}}\,-C{{H}_{3}}\]
done
clear
D)
\[{{C}_{6}}{{H}_{5}}-\overset{\text{O}}{\mathop{\overset{||}{\mathop{C}}\,}}\,-C{{H}_{3}}\]
done
clear
View Answer play_arrow
Which of the following is a secondary amine?
A)
\[{{C}_{6}}{{H}_{5}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{N}}\,}}\,-C{{H}_{3}}\]
done
clear
B)
\[{{C}_{6}}{{H}_{5}}-\underset{{{H}_{{}}}}{\mathop{\underset{|}{\mathop{N}}\,}}\,-C{{H}_{3}}\]
done
clear
C)
\[C{{H}_{3}}-N{{H}_{2}}\]
done
clear
D)
\[{{C}_{6}}{{H}_{5}}-N{{H}_{2}}\]
done
clear
View Answer play_arrow
Which of the following converts acetone to acetone oxime?
A)
\[N{{H}_{2}}OH\]
done
clear
B)
\[{{H}_{2}}N-N{{H}_{2}}\]
done
clear
C)
\[2,4-DNP\]
done
clear
D)
\[{{C}_{6}}{{H}_{5}}NHN{{H}_{2}}\]
done
clear
View Answer play_arrow
Chloroethane reacts with Y to form \[NaCl\] and Z. One mole of Z reacts with two moles of HI to form water and iodoethane. Which of the following is Y?
A)
\[C{{H}_{3}}CHO\]
done
clear
B)
\[{{C}_{2}}{{H}_{5}}O{{C}_{2}}{{H}_{5}}\]
done
clear
C)
\[{{C}_{2}}{{H}_{5}}ONa\]
done
clear
D)
\[C{{H}_{3}}COOH\]
done
clear
View Answer play_arrow
Which of the following is a tertiary alcohol?
A)
\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-OH\]
done
clear
B)
\[C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-C{{H}_{2}}-OH\]
done
clear
C)
\[C{{H}_{3}}-\underset{C{{H}_{3}}}{\overset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,-OH\]
done
clear
D)
\[C{{H}_{3}}-C{{H}_{2}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{CH}}\,}}\,\]
done
clear
View Answer play_arrow
Which of the following is used in the extraction of silver?
A)
\[NaCN\]
done
clear
B)
\[N{{a}_{2}}S{{O}_{4}}\]
done
clear
C)
\[N{{a}_{2}}C{{O}_{3}}\]
done
clear
D)
\[NaCl\]
done
clear
View Answer play_arrow
Which one of the following ions exhibits colour in aqueous solution?
A)
\[T{{i}^{4+}}\]
done
clear
B)
\[Z{{n}^{2+}}\]
done
clear
C)
\[N{{i}^{2+}}\]
done
clear
D)
\[S{{c}^{3+}}\]
done
clear
View Answer play_arrow
What is the electrolyte used in the electrolytic method of preparation of fluorine?
A)
\[KH{{F}_{2}}+LiF\]
done
clear
B)
\[CaC{{l}_{2}}+KF\]
done
clear
C)
\[KF+LiH{{F}_{2}}\]
done
clear
D)
\[NaF+CaC{{l}_{2}}\]
done
clear
View Answer play_arrow
Aniline on heating with X in the presence of KOF gives a product with very bad smell. Which of the following is X?
A)
\[CC{{l}_{4}}\]
done
clear
B)
\[CHC{{l}_{3}}\]
done
clear
C)
\[{{C}_{2}}{{H}_{5}}Cl\]
done
clear
D)
\[C{{H}_{3}}Cl\]
done
clear
View Answer play_arrow
Chloral hydrate is dissolved in \[NaOH\] solution and distilled. What are the compound obtained?
A)
\[{{C}_{2}}{{H}_{5}}Cl,C{{H}_{3}}COONa\]
done
clear
B)
\[CHC{{l}_{3}},HCOONa,{{H}_{2}}O\]
done
clear
C)
\[C{{H}_{3}}Cl,C{{H}_{3}}COONa\]
done
clear
D)
\[C{{H}_{2}}C{{l}_{2}},NaCl\]
done
clear
View Answer play_arrow
Bleaching action of chlorine occurs in the presence of
A)
Moisture
done
clear
B)
Sun light
done
clear
C)
\[{{O}_{2}}\]
done
clear
D)
Dry air
done
clear
View Answer play_arrow
Which of the following reaction conditions are used for the conversion of ethanol to ethylene?
A)
Conc.\[{{H}_{2}}S{{O}_{4}}/170{{\,}^{o}}C\]
done
clear
B)
Dil.\[{{H}_{2}}S{{O}_{4}}/100{{\,}^{o}}C\]
done
clear
C)
Dil.\[{{H}_{2}}S{{O}_{4}}/140{{\,}^{o}}C\]
done
clear
D)
Conc.\[{{H}_{2}}S{{O}_{4}}/70{{\,}^{o}}C\]
done
clear
View Answer play_arrow
Which of the following has more acidic character?
A)
\[{{H}_{2}}Se\]
done
clear
B)
\[{{H}_{2}}S\]
done
clear
C)
\[{{H}_{2}}O\]
done
clear
D)
\[{{H}_{2}}Te\]
done
clear
View Answer play_arrow
Which of the following compounds is formed when ethanol reacts with acetic acid in the presence of concentrated\[{{H}_{2}}S{{O}_{4}}?\]
A)
\[{{C}_{2}}{{H}_{5}}O{{C}_{2}}{{H}_{5}}\]
done
clear
B)
\[C{{H}_{3}}COO{{C}_{2}}{{H}_{5}}\]
done
clear
C)
\[C{{H}_{3}}C{{H}_{2}}CHO\]
done
clear
D)
\[C{{H}_{3}}OC{{H}_{3}}\]
done
clear
View Answer play_arrow
What is the compound formed when acetaldehyde is reacted with \[LiAl{{H}_{4}}?\]
A)
\[C{{H}_{3}}COOH\]
done
clear
B)
\[C{{H}_{3}}COC{{H}_{3}}\]
done
clear
C)
\[{{C}_{2}}{{H}_{5}}OH\]
done
clear
D)
\[{{C}_{2}}{{H}_{5}}O{{C}_{2}}{{H}_{5}}\]
done
clear
View Answer play_arrow
Which of the following is the correct order of ionic radii?
A)
\[N{{a}^{+}}>M{{g}^{2+}}>A{{l}^{3+}}>S{{i}^{4+}}\]
done
clear
B)
\[S{{i}^{4+}}<A{{l}^{3+}}>M{{g}^{2+}}>N{{a}^{+}}\]
done
clear
C)
\[A{{l}^{3+}}<S{{i}^{4+}}>N{{a}^{+}}>M{{g}^{2+}}\]
done
clear
D)
\[N{{a}^{+}}<M{{g}^{2+}}<A{{l}^{3+}}<s{{i}^{4+}}\]
done
clear
View Answer play_arrow
Which of the following is used to convert nitrobenzene to hydrazobenzene?
A)
\[Zn/NaOH\]
done
clear
B)
\[LiAl{{H}_{4}}\]
done
clear
C)
\[Sn/HCl\]
done
clear
D)
\[Zn/N{{H}_{4}}Cl\]
done
clear
View Answer play_arrow
Which of the following has the highest electronegativity?
A)
K
done
clear
B)
B
done
clear
C)
Cl
done
clear
D)
Na
done
clear
View Answer play_arrow
Which of the following has the least bond energy?
A)
\[{{H}_{2}}\]
done
clear
B)
\[{{F}_{2}}\]
done
clear
C)
\[{{O}_{2}}\]
done
clear
D)
\[{{N}_{2}}\]
done
clear
View Answer play_arrow
Which of the following can be detected by silver mirror test?
A)
\[C{{H}_{3}}CHO\]
done
clear
B)
\[C{{H}_{3}}COOH\]
done
clear
C)
\[C{{H}_{3}}COC{{H}_{3}}\]
done
clear
D)
\[{{C}_{2}}{{H}_{6}}\]
done
clear
View Answer play_arrow
Which of the following is used to convert nitrobenzene to azobenzene?
A)
\[Sn/HCl\]
done
clear
B)
\[Zn/NaOH\]
done
clear
C)
\[LiA1{{H}_{4}}\]
done
clear
D)
\[~Zn/N{{H}_{4}}Cl\]
done
clear
View Answer play_arrow
Which of the following has the lowest boiling point?
A)
\[{{H}_{2}}O\]
done
clear
B)
\[~C{{H}_{4}}\]
done
clear
C)
\[{{C}_{2}}{{H}_{5}}OH\]
done
clear
D)
HF
done
clear
View Answer play_arrow
Acetic acid reacts with ethanol in the presence of \[{{H}_{2}}S{{O}_{4}}\]to form X and water, which of the following is X?
A)
\[C{{H}_{3}}CO{{C}_{2}}{{H}_{5}}\]
done
clear
B)
Dil.\[{{H}_{2}}S{{O}_{4}}\]
done
clear
C)
Anhydrous
done
clear
D)
\[Ni/{{H}_{2}},70{{\,}^{o}}C\]
done
clear
View Answer play_arrow
Methyl benzene can be prepared by reacting benzene with bromomethane in the presence of
A)
\[B{{r}_{2}}/CC{{l}_{4}}\]
done
clear
B)
Dil.\[{{H}_{2}}S{{O}_{4}}\]
done
clear
C)
Anhydrous\[AlC{{l}_{3}}\]
done
clear
D)
\[Ni/{{H}_{2}}.70{{\,}^{o}}C\]
done
clear
View Answer play_arrow
Benzene is used in the preparation of
A)
Vinegar
done
clear
B)
Chloroform
done
clear
C)
Gammaxene
done
clear
D)
Polythene
done
clear
View Answer play_arrow
In a reaction, sodium is heated with \[BeC{{l}_{2}},\]in this reaction, sodium acts as
A)
Precipitating agent
done
clear
B)
Hydrolysis agent
done
clear
C)
Reducing agent
done
clear
D)
Oxidizing agent
done
clear
View Answer play_arrow
Which of the following is used in the manufacture of ethanol?
A)
\[{{C}_{2}}{{H}_{4}}\]
done
clear
B)
\[C{{H}_{4}}\]
done
clear
C)
\[{{C}_{2}}{{H}_{2}}\]
done
clear
D)
\[{{C}_{2}}{{H}_{6}}\]
done
clear
View Answer play_arrow
What is the reaction conditions used for the formation of ethylene glycol from ethylene?
A)
\[{{O}_{3}}/{{H}_{2}}O\]
done
clear
B)
\[S{{O}_{4}}/60{{\,}^{o}}C\]
done
clear
C)
Cold alkaline\[KMn{{O}_{4}}\]
done
clear
D)
Bromine water
done
clear
View Answer play_arrow
What is the C-C bond length (in angstroms) in diamond?
A)
5.2
done
clear
B)
2.0
done
clear
C)
1.54
done
clear
D)
3.35
done
clear
View Answer play_arrow
In which of the following compounds, the weight percentage of C and H are 80 and 20 respectively?
A)
\[{{C}_{2}}{{H}_{6}}\]
done
clear
B)
\[C{{H}_{4}}\]
done
clear
C)
\[{{C}_{6}}{{H}_{6}}\]
done
clear
D)
\[{{C}_{2}}{{H}_{3}}\]
done
clear
View Answer play_arrow
Which of the following is calcium superphosphate?
A)
\[Ca{{({{H}_{2}}P{{O}_{4}})}_{2}}{{H}_{2}}O+CaS{{O}_{4}}\]
done
clear
B)
\[CaS{{O}_{4}}+CaO\]
done
clear
C)
\[C{{a}_{3}}{{(P{{O}_{4}})}_{2}}+2CaS{{O}_{4}}\]
done
clear
D)
\[Ca{{({{H}_{2}}P{{O}_{4}})}_{2}}{{H}_{2}}O+2(CaS{{O}_{2}}.2{{H}_{2}}O)\]
done
clear
View Answer play_arrow
Just as Xenopsylla is to Yersinia pestis, so is
A)
Homo sapiens to Taenia solium
done
clear
B)
Culex to Plasmodium falciparum
done
clear
C)
Phlebotomus to Leishmania donovani
done
clear
D)
Glossina palpalis to Wuchereria bancrofti
done
clear
View Answer play_arrow
What is the space between arachnoid and pia mater called?
A)
Meninges
done
clear
B)
Subdural space
done
clear
C)
Supra-arachnoid space
done
clear
D)
Subarachnoid space
done
clear
View Answer play_arrow
Which of the following is correctly labelled for the given figure?
A)
A: Reissner's membrane
done
clear
B)
B: Scala vestibuli
done
clear
C)
C: Basilar membrane
done
clear
D)
D: Tectorial membrane
done
clear
View Answer play_arrow
The bacteria oxidizing a number of inorganic compounds to obtain energy for assimilation of carbon dioxide is called
A)
Photoautotrophic bacteria
done
clear
B)
Chemoautotrophic bacteria
done
clear
C)
Heterotrophic bacteria
done
clear
D)
None of the above
done
clear
View Answer play_arrow
In mammals, the failure of testes to descend into the scrotum is known as
A)
Castration
done
clear
B)
Impotency
done
clear
C)
Paedogenesis
done
clear
D)
Cryptorchidism
done
clear
View Answer play_arrow
Convergent evolution is shown by
A)
Rabbit and dog
done
clear
B)
Starfish and jellyfish
done
clear
C)
Fish and whale
done
clear
D)
Bacteria and Amoeba
done
clear
View Answer play_arrow
Cutting or putting ligatures around the male duct is called
A)
Tubectomy
done
clear
B)
Vasectomy
done
clear
C)
Salpingectomy
done
clear
D)
None of these
done
clear
View Answer play_arrow
If the concentration of insecticide DDT in pond water is 0.04 ppm, which of the following sequences of DDT concentration would be correct for algae-fishes-man food chain?
A)
Algae > Fishes < Man
done
clear
B)
Algae > Fishes > Man
done
clear
C)
Algae < Fishes < Man
done
clear
D)
Algae < Fishes > Man
done
clear
View Answer play_arrow
In plasmid, R-Gene is responsible for
A)
Exchange of genetic material between two partners
done
clear
B)
Drug resistance
done
clear
C)
Locomotion
done
clear
D)
All of the above
done
clear
View Answer play_arrow
Tyloses results in the formation of
A)
Sap wood from cambium
done
clear
B)
Heart wood from sap wood
done
clear
C)
Heart wood from vascular cambium
done
clear
D)
None of the above
done
clear
View Answer play_arrow
Diphtheria is caused by
A)
Bordetella
done
clear
B)
Clostridium
done
clear
C)
Treponema
done
clear
D)
Corynebacterium
done
clear
View Answer play_arrow
For the micropropagation technique
A)
Pollens are used
done
clear
B)
Shoot apices or root apices are used
done
clear
C)
Phloem cells are used
done
clear
D)
None of the above
done
clear
View Answer play_arrow
Which one of the following is an environment-related disorder with the correct main cause?
A)
Black lung disease (pneumoconiosis) found mainly in workers in stone quarries and crushers.
done
clear
B)
Blue baby disease (methemoglobinemia) due to heavy use of nitrogenous fertilizers in the area.
done
clear
C)
Non-Hodgkin's lymphoma found mainly in workers involved in the manufacture of neem- based pesticides.
done
clear
D)
Skin cancer mainly in people exposed to benzene and methane.
done
clear
View Answer play_arrow
Which of the following is an Non-nucleated living cell at maturity?
A)
Vessels
done
clear
B)
Tracheids
done
clear
C)
Sieve tube
done
clear
D)
All of these
done
clear
View Answer play_arrow
Dengue fever is similar to yellow fever where both
A)
Affect the lungs
done
clear
B)
Are transmitted by ticks
done
clear
C)
Occur in Arctic regions
done
clear
D)
Are caused by RNA viruses
done
clear
View Answer play_arrow
During the injury nasal septum gets damaged and for the recovery which cartilage is responsible?
A)
Elastic cartilage
done
clear
B)
Fibrous cartilage
done
clear
C)
Hyaline cartilage
done
clear
D)
Calcified cartilage
done
clear
View Answer play_arrow
Sequence of amino acids in a polypeptide is determined by
A)
rRNA
done
clear
B)
tRNA
done
clear
C)
mRNA
done
clear
D)
snRNA
done
clear
View Answer play_arrow
RuBP-carboxylase oxygenase is present in
A)
Golgi bodies
done
clear
B)
Peroxisome
done
clear
C)
Chloroplast
done
clear
D)
Mitochondria
done
clear
View Answer play_arrow
Choose the wrong statement
A)
VNTR belong to a class of mini-satellite DNA.
done
clear
B)
Satellite DNA normally do not code for proteins.
done
clear
C)
DNA sequencing works on the principle developed by Frederick Sanger.
done
clear
D)
HGP was coordinate by the US Department of Energy and the National Institute of Health.
done
clear
E)
DNA fingerprinting involves identifying similarities in repetitive DNA.
done
clear
View Answer play_arrow
Death of stem and root tips occur due to the deficiency of
A)
Phosphorus
done
clear
B)
Calcium
done
clear
C)
Nitrogen
done
clear
D)
Carbon
done
clear
View Answer play_arrow
Biochemical Oxygen Demand (BOD) is a measure of
A)
Industrial wastes poured into water bodies.
done
clear
B)
Extent to which water is polluted with organic compounds.
done
clear
C)
Amount of carbon monoxide inseparably combined with haemoglobin.
done
clear
D)
Amount of oxygen needed by green plants during night.
done
clear
View Answer play_arrow
During transcription, the DNA site at which RNA polymerase binds is called
A)
Receptor
done
clear
B)
Enhancer
done
clear
C)
Regulator
done
clear
D)
Promoter
done
clear
View Answer play_arrow
Which of the following contains blood with the lowest oxygen content?
A)
Aorta
done
clear
B)
Left atrium
done
clear
C)
Right ventricle
done
clear
D)
Pulmonary veins
done
clear
View Answer play_arrow
The problem of blindness in poor countries can be taken care of by using the following:
A)
Transgenic maize
done
clear
B)
Bt brinjal
done
clear
C)
Transgenic tomato
done
clear
D)
Golden rice
done
clear
View Answer play_arrow
Angiotensinogen is converted to angiotensin by
A)
ADH
done
clear
B)
Renin
done
clear
C)
ANF
done
clear
D)
Aldosterone
done
clear
View Answer play_arrow
Transfer of pollen grains from one flower to another flower of the same plant is called
A)
Xenogamy
done
clear
B)
Geitonogamy
done
clear
C)
Autogamy
done
clear
D)
Allogamy
done
clear
View Answer play_arrow
When placenta forms a ridge along the venter suture of the ovary and the ovules are borne on the ridge forming two rows, the type of placentation is termed as
A)
Marginal
done
clear
B)
Axile
done
clear
C)
Parietal
done
clear
D)
Free central
done
clear
View Answer play_arrow
You are watching a horror movie and you notice your heart beating fast and mouth gets dry It is because of
A)
Fight and fight response
done
clear
B)
Autonomic nervous system
done
clear
C)
Sympathetic nervous system
done
clear
D)
Parasympathetic nervous system
done
clear
E)
Both (a) and (c)
done
clear
View Answer play_arrow
The reservoir for the gaseous type of biogeochemical cycle exists in
A)
Stratosphere
done
clear
B)
Atmosphere
done
clear
C)
Ionosphere
done
clear
D)
Lithosphere
done
clear
View Answer play_arrow
Probes used in DNA fingerprinting are initially
A)
19 base long oligonucleotide
done
clear
B)
Single stranded RNA
done
clear
C)
Mini-satellite
done
clear
D)
All of the above
done
clear
View Answer play_arrow
Which is not a prezygotic isolation mechanism?
A)
Seasonal isolation
done
clear
B)
Hybrid sterility
done
clear
C)
Ecological isolation
done
clear
D)
Geographical isolation
done
clear
View Answer play_arrow
Entry of pollen tube with two male gametes and tube nucleus through micropyle is called
A)
Mesogamy
done
clear
B)
Porogamy
done
clear
C)
Chalazogamy
done
clear
D)
Autogamy
done
clear
View Answer play_arrow
Bryophytes differ from pteridophytes in not having
A)
Archegonia
done
clear
B)
Defined sporophyte
done
clear
C)
Vascular strands (steles)
done
clear
D)
Multicellular embryo
done
clear
View Answer play_arrow
The chronological order of human evolution from early period to the recent is
A)
Ramapithecus - Australopithecus - Homo habilis - Homo erectus
done
clear
B)
Australopithecus - Ramapithecus - Homo habilis - Homo erectus
done
clear
C)
Pithecanthropus pekinensis - Homo habilis - Homo erectus
done
clear
D)
Australopithecus - Ramapithecus - Pithecantropus pekinensis - Homo erectus
done
clear
View Answer play_arrow
Raceme differs from spike in having
A)
Unisexual flowers
done
clear
B)
Sessile flowers
done
clear
C)
Gamopetalous flowers
done
clear
D)
Pedicellate flowers
done
clear
View Answer play_arrow
Polysome is formed by
A)
A ribosome with several subunits.
done
clear
B)
Several ribosomes attached to a single mRNA.
done
clear
C)
Ribosomes attached to each other in a linear arrangement.
done
clear
D)
Many ribosomes attached to a strand of endoplasmic reticulum.
done
clear
View Answer play_arrow
Which stage of cell division provides visual evidence of Mendel's law of independent assortment?
A)
Mitotic anaphase
done
clear
B)
Meiotic anaphase I
done
clear
C)
Mitotic metaphase
done
clear
D)
Meiotic anaphase II
done
clear
View Answer play_arrow
Identify the correct type of food chain. Dean animal\[\to \]Blowfly maggot\[\to \]Common frog \[\to \]Snake
A)
Grazing food chain
done
clear
B)
Detrital food chain
done
clear
C)
Predator food chain
done
clear
D)
Decomposer food chain
done
clear
View Answer play_arrow
Stem is modified to phylloclade in
A)
Opuntia
done
clear
B)
Ruscus
done
clear
C)
Coccoloba
done
clear
D)
All of these
done
clear
View Answer play_arrow
Given below is one of the types of ecological pyramids. This type represents
A)
Energy pyramid in a spring
done
clear
B)
Pyramid of biomass in a lake
done
clear
C)
Pyramid of numbers in a grassland
done
clear
D)
Pyramid of biomass in a fallow land
done
clear
View Answer play_arrow
The product of which of the following organisms has been commercialized as blood cholesterol lowering agent
A)
Saccharomyces cerevisiae
done
clear
B)
Trichoderma polysporum
done
clear
C)
Monascus purpureus
done
clear
D)
Aspergillus niger
done
clear
View Answer play_arrow
HSK pathway is also known as
A)
\[{{C}_{2}}\]cycle
done
clear
B)
\[{{C}_{3}}\]cycle
done
clear
C)
\[{{C}_{4}}\]cycle
done
clear
D)
None of these
done
clear
View Answer play_arrow
What will be the direction of net osmotic movement of water if a solution 'A' enclosed in a semipermeable membrane, having an osmotic potential of -30 Bars and turgor pressure of 5 Bars is submerged in a solution 'B' with an osmotic potential of -10 Bars and 0 turgor pressure?
A)
Equal movement in both directions
done
clear
B)
B to A
done
clear
C)
No movement
done
clear
D)
A to B
done
clear
View Answer play_arrow
Both husband and wife have normal vision though their fathers were colour-blind and mothers did not have any gene for colour blindness. The probability of their daughters becoming colour-blind is
A)
0%
done
clear
B)
25%
done
clear
C)
50%
done
clear
D)
75%
done
clear
View Answer play_arrow
Secretion of which of the following structure prepares the inner wall of uterus for implantation?
A)
Ovary
done
clear
B)
Pituitary gland
done
clear
C)
Corpus luteum
done
clear
D)
Ovarian follicle
done
clear
View Answer play_arrow
Congestion of the lungs is one of the main symptoms in
A)
Angina
done
clear
B)
Hypotension
done
clear
C)
Heart failure
done
clear
D)
Atherosclerosis
done
clear
View Answer play_arrow
Cancer cells are more easily damaged by radiation than normal cells because they are
A)
Non-dividing
done
clear
B)
Starved of mutation
done
clear
C)
Different in structure
done
clear
D)
Undergoing rapid division
done
clear
View Answer play_arrow
Tricarpellary, syncarpous ovary with parietal placentation is found in
A)
Liliaceae
done
clear
B)
Euphorbiaceae
done
clear
C)
Cucurbitaceae
done
clear
D)
None of these
done
clear
View Answer play_arrow
The average trophic efficiency of transfer of energy from one trophic level to the higher trophic level is called
A)
Assimilation efficiency
done
clear
B)
Exploitation efficiency
done
clear
C)
Gross primary production
done
clear
D)
Lindeman's trophic efficiency rule
done
clear
View Answer play_arrow
Some important events in the human female reproductive cycle are given below. Arrange the events in a proper sequence:
(A): Secretion of FSH (B): Growth of corpus luteum (C): Growth of the follicle and oogenesis (D): Ovulation E: Sodden increase in the levels of LH
A)
ADCEB
done
clear
B)
BACDE
done
clear
C)
ACEDB
done
clear
D)
CADBE
done
clear
View Answer play_arrow
Species diversity increases 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
Find out the correct statement:
A)
Nearly 90 per cent of photosynthesis is carried out by algae.
done
clear
B)
All algae are autotrophs and they synthesize starch.
done
clear
C)
Algae exhibit only haplontic type life cycle.
done
clear
D)
Algae are useful plants on the earth as they produce food, fibres and medicines.
done
clear
View Answer play_arrow
The nuclear equivalent of prokaryotic organism is known as prokaryon or nucleoid and it
A)
Has one true chromosome
done
clear
B)
Sometimes has a nucleolus
done
clear
C)
Has a proper nuclear membrane
done
clear
D)
Does not divide by proper mitosis
done
clear
View Answer play_arrow
Empty diatom cells are called
A)
Raphe
done
clear
B)
Valves
done
clear
C)
Frustule
done
clear
D)
Girdles
done
clear
View Answer play_arrow
Which one of the following cannot be considered as Assisted Reproductive Technology (ART)?
A)
In vitro Fertilization (IVF)
done
clear
B)
Medical Termination of Pregnancy (MTP)
done
clear
C)
Gamete Intrafallopian Transfer (GIFT)
done
clear
D)
Intra Cytoplasmic Sperm Injection (ICSI)
done
clear
View Answer play_arrow
Fusion of lymphocytes with myeloma in hybridoma technology cells is a classic example of
A)
Somatic hybridization
done
clear
B)
Normal hybridization
done
clear
C)
Micropropagation
done
clear
D)
Cryopreservation
done
clear
View Answer play_arrow
Which group of vertebrates comprises the highest number of endangered species?
A)
Birds
done
clear
B)
Fishes
done
clear
C)
Reptiles
done
clear
D)
Mammal
done
clear
View Answer play_arrow
The type of immunoglobulin present in the colostrum secreted by mammary glands is
A)
IgA
done
clear
B)
IgG
done
clear
C)
IgD
done
clear
D)
IgE
done
clear
View Answer play_arrow
A red pigment 'leghaemoglobin' in root nodules of legumes is helpful in the nitrogen fixation of
A)
Providing oxygen
done
clear
B)
Helping in aerobic respiration
done
clear
C)
Removal of oxygen
done
clear
D)
None of the above
done
clear
View Answer play_arrow
One of the following is not a common disorder associated with digestive system
A)
Tetanus
done
clear
B)
Diarrhoea
done
clear
C)
Jaundice
done
clear
D)
Dysentery
done
clear
View Answer play_arrow
Epinephrine and norepinephrine together are known as
A)
Steroids
done
clear
B)
Pheromones
done
clear
C)
Catecholamines
done
clear
D)
All of these
done
clear
View Answer play_arrow
Formation of blood is known as
A)
Polycythemia
done
clear
B)
Haemopoiesis
done
clear
C)
Erythropoiesis
done
clear
D)
Lymphopoiesis
done
clear
View Answer play_arrow
Which one of the following animals is correctly matched with its characteristic and taxon rank?
A)
Animal
Characteristic
Taxon
Millipede
Ventral nerve cord
Arachnida
done
clear
B)
Animal
Characteristic
Taxon
Silverfish
Pectoral and pelvic fins
Chordata
done
clear
C)
Animal
Characteristic
Taxon
Duckbill platypus
Oviparous
Mammalia
done
clear
D)
Animal
Characteristic
Taxon
Sea anemone
Triploblastic
Cnidaria
done
clear
View Answer play_arrow
The two subunits of ribosome remains united at a critical level of
A)
Calcium
done
clear
B)
Copper
done
clear
C)
Magnesium
done
clear
D)
Manganese
done
clear
View Answer play_arrow
Which of the following suppresses brain function and relieves intense pain?
A)
Opium
done
clear
B)
Morphine
done
clear
C)
Heroin
done
clear
D)
All of these
done
clear
View Answer play_arrow
The application of Polymerase Chain Reaction is to Up
A)
Demonstrate DNA as a genetic material
done
clear
B)
To replicate specific DNA sequences at high temperature
done
clear
C)
Determine minerals in biological tissues
done
clear
D)
Replicate RNA sequences at low temperature
done
clear
View Answer play_arrow
The process in which the DNA of a bacterial cell is transferred into another bacterial cell by a virus is known as
A)
Conjugation
done
clear
B)
Transduction
done
clear
C)
Reproduction
done
clear
D)
Transformation
done
clear
View Answer play_arrow
The process in which haploid embryo is formed from haploid egg without fertilization is called
A)
Apospory
done
clear
B)
Apogamy
done
clear
C)
Agamospermy
done
clear
D)
Vegetative reproduction
done
clear
View Answer play_arrow
Which is a correct match in respect to edible part?
A)
Anacardium - Cotyledons
done
clear
B)
Litchi - Mesocarp
done
clear
C)
Hesperidium - Endocarp
done
clear
D)
Pomegranate - Pericarp
done
clear
View Answer play_arrow
If the total amount of adenine and thymine in a double stranded DNA is 60%, then the amount of guanine in this DNA will be
A)
15%
done
clear
B)
20%
done
clear
C)
30%
done
clear
D)
40%
done
clear
View Answer play_arrow
Azolla grows in Paddy fields to help in improving the soil fertility by
A)
Denitrification
done
clear
B)
Nitrogen fixation
done
clear
C)
Vermiform culture
done
clear
D)
Nitrification
done
clear
View Answer play_arrow
The brain capacity of Homo erectus was about
A)
650 cc
done
clear
B)
900 cc
done
clear
C)
1200 cc
done
clear
D)
1400 cc
done
clear
View Answer play_arrow
A region of DNA template strand has the sequence 3'-ATTCGC-5' What is the sequence of RNA transcribed from this DNA?
A)
3'-AUUCGC-5'
done
clear
B)
3'-TAAGCG-5'
done
clear
C)
5'-UAAGCG-3'
done
clear
D)
5'-ATTCGC-3'
done
clear
View Answer play_arrow
Which one of the following four glands is correctly matched with the accompanying description?
A)
Thyroid - Hyperactivity in young children causes cretinism
done
clear
B)
Thymus - Starts undergoing atrophy after puberty
done
clear
C)
Pancreas - Delta cells of the Islets of Langerhans secrete a hormone which stimulates glycolysis in liver
done
clear
D)
Parathyroid - Secretes parathormone which promotes the movement of calcium ions from blood into bones during calcification
done
clear
View Answer play_arrow
Flagella of prokaryotic and eukaryotic cells differ in
A)
Microtubular organization and function
done
clear
B)
Type of movement and placement in cell
done
clear
C)
Location in cell and mode of functioning
done
clear
D)
Microtubular organization and type of movement
done
clear
View Answer play_arrow
Which one of the following is not a fibrillar protein?
A)
Elastin
done
clear
B)
Myosin
done
clear
C)
Keratin
done
clear
D)
Albumin
done
clear
View Answer play_arrow
There exists a close association between the alga and the fungus within lichen. The fungus
A)
Fixes the atmospheric nitrogen for the alga
done
clear
B)
Provides protection, anchorage and absorptior for the alga
done
clear
C)
Provides food for the alga
done
clear
D)
Releases oxygen for the alga
done
clear
View Answer play_arrow
Which of the following is excluded in Whittaker?s five kingdom system of classification?
A)
Algae
done
clear
B)
Fungi
done
clear
C)
Bacteria
done
clear
D)
Viruses
done
clear
View Answer play_arrow
Which one of the following is a vascular cryptogam'
A)
Cedrus
done
clear
B)
Equisetum
done
clear
C)
Ginkgo
done
clear
D)
Marchantia
done
clear
View Answer play_arrow
Industrial production of ethanol from starch is brought about by a certain species of
A)
Penicillin
done
clear
B)
Azotobacter
done
clear
C)
Saccharomyces
done
clear
D)
Lactobacillus
done
clear
View Answer play_arrow
Which one of the following is a basic amino acid?
A)
done
clear
B)
done
clear
C)
done
clear
D)
done
clear
View Answer play_arrow
Blood calcium level is a resultant of how much dietary calcium is absorbed, how much calcium is lost in the urine, how much bone dissolves releasing calcium into the blood and how much calcium from blood enter tissues. A number of factors play an important role in these processes. Mark the one which has no role
A)
Vitamin D
done
clear
B)
Thymosin
done
clear
C)
Thyrocalcitonin
done
clear
D)
Parathyroid hormone
done
clear
View Answer play_arrow
Identify the correct statement with reference to trans port of respiratory gases by blood:
A)
Only oxygen is transported by blood.
done
clear
B)
Only carbon dioxide is transported by blood.
done
clear
C)
Haemoglobin is necessary for transport of carbon dioxide and carbonic anhydrase for transport of oxygen.
done
clear
D)
Haemoglobin is necessary for transport of oxygen and carbonic anhydrase for transport of carbon dioxide.
done
clear
View Answer play_arrow
Transcriptional control in eukaryotes may involve changes in
A)
Chromatic structure
done
clear
B)
Amount of chromatin
done
clear
C)
Both (a) and (b) correct
done
clear
D)
None of these
done
clear
View Answer play_arrow
RR (red) Antirrhinum majus is crossed with white (rr) one. Offsprings (rr) are pink. This is an example of
A)
Hybrid
done
clear
B)
Supplementary genes
done
clear
C)
Dominant-recessive
done
clear
D)
Incomplete dominance
done
clear
View Answer play_arrow
Which stage of cell division do the following figures A and B specify respectively?
(A) (B)
A)
Metaphase - Telophase
done
clear
B)
Telophase - Metaphase
done
clear
C)
Late Anaphase - Prophase
done
clear
D)
Prophase - Anaphase
done
clear
View Answer play_arrow
GAATTC is the recognition site for which of the following restriction endonuclease?
A)
HindIII
done
clear
B)
EcoRI
done
clear
C)
BamI
done
clear
D)
HaeIII
done
clear
View Answer play_arrow
Which one of the following is the correct description of a certain part of a normal human skeleton?
A)
Parietal bone and the temporal bone of skull are bones joined by fibrous joint.
done
clear
B)
First vertebra is an axis which articulates the occipital condyles.
done
clear
C)
The 9th and 10th 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
As trees grow older, which of the following increases more rapidly in thickness?
A)
Heart wood
done
clear
B)
Sap wood
done
clear
C)
Cortex
done
clear
D)
Periderm
done
clear
View Answer play_arrow
In maize, aleurone layer develops in the outermost region of
A)
Pericarp
done
clear
B)
Epicarp
done
clear
C)
Testa
done
clear
D)
Endosperm
done
clear
View Answer play_arrow