Solved papers for BHU PMT BHU PMT (Screening) Solved Paper-2006

BHU PMT (Screening) Solved Paper-2006 Total Questions - 200

1) The length of a simple pendulum is about 100 cm known to have an accuracy of 1 mm. Its period of oscillation is 2 s determined by measuring the time for 100 oscillations using a clock of 0.1s resolution. What is the accuracy in the determined value of g?

A)

0.2%

B)

0.5%

C)

0.1%

D)

2%

View Answer
2) Young's modulus of the material of a wire is Y. On pulling the wire by a force F, the increase in its length is x. The potential energy of the stretched wire is:

A)

\[\frac{1}{2}Fx\]

B)

\[\frac{1}{2}Yx\]

C)

\[\frac{1}{2}F{{x}^{2}}\]

D)

none of these

View Answer
3) A charge situated at a certain distance along the axis of an electric dipole experience a force F. If the distance of the charge from the dipole is doubled, the force acting on it will become:

A)

2F

B)

\[\frac{F}{2}\]

C)

  \[\frac{F}{4}\]

D)

\[\frac{F}{8}\]

View Answer
4) A coil in the shape of an equilateral triangle of side I is suspended between the pole pieces of a permanent magnet such that 8 is in plane of the coil. If due to a current i in the triangle a torque t acts on it, the side I of the triangle is:

A)

\[\frac{2}{\sqrt{3}}{{\left( \frac{\tau }{Bi} \right)}^{\frac{1}{2}}}\]

B)

\[\frac{2}{3}\left( \frac{\tau }{Bi} \right)\]

C)

\[2{{\left( \frac{\tau }{\sqrt{3}Bi} \right)}^{\frac{1}{2}}}\]

D)

\[\frac{1}{\sqrt{3}}\frac{\tau }{Bi}\]

View Answer
5) A certain electrical conductor has a square cross-section, 2.0 mm on a side and is 12 m long. The resistance between its ends is\[0.072\,\Omega \]. The resistivity of its material is equal to:

A)

\[2.4\times {{10}^{-6}}\Omega m\]

B)

\[1.2\times {{10}^{-6}}\Omega m\]

C)

\[1.2\times {{10}^{-8}}\Omega m\]

D)

\[2.4\times {{10}^{-8}}\Omega m\]

View Answer
6) Figure shows three points A, B and C in a region of uniform electric field\[\overrightarrow{E}\].The line AB is perpendicular and BC is parallel to the field lines. Then which of the following holds good?

A)

\[{{V}_{A}}={{V}_{B}}={{V}_{C}}\]

B)

\[{{V}_{A}}={{V}_{B}}>{{V}_{C}}\]

C)

\[{{V}_{A}}={{V}_{B}}<{{V}_{C}}\]

D)

\[{{V}_{A}}>{{V}_{B}}={{V}_{C}}\] Where\[{{V}_{A}},{{V}_{B}}\]and\[{{V}_{C}}\]represent the electric potentials at the points A, B and C respectively.

View Answer
7) The\[(x,\text{ }y,\text{ }z)\]co-ordinates of two points A and B are given respectively as (0,3, -1) and (-2, 6, 4). The displacement vector form A to B may be given by:

A)

\[-2\hat{i}+6\hat{j}+4\hat{k}\]

B)

\[-2\hat{i}+3\hat{j}+3\hat{k}\]

C)

\[-2\hat{i}+3\hat{j}+5\hat{k}\]

D)

\[2\hat{i}-3\hat{j}-5\hat{k}\]

View Answer
8) In the first second of its flight, rocket ejects 1/60 of its mass with a velocity of\[2400\text{ }m{{s}^{-1}}\]. The acceleration of the rocket is:

A)

\[19.6m{{s}^{-2}}\]

B)

\[30.2m{{s}^{-2}}\]

C)

\[40\,m{{s}^{-2}}\]

D)

\[49.8m{{s}^{-2}}\]

View Answer
9) An ice cube is kept on an inclined plane of angle\[30{}^\circ \]. Coefficient of kinetic friction between block and incline plane is\[\frac{1}{\sqrt{3}}.\]. What is acceleration of block?

A)

Zero

B)

\[2\text{ }m/{{s}^{2}}\]

C)

\[1.5\text{ }m/{{s}^{2}}\]

D)

5 m/s

View Answer
10) The equivalent resistance between the points P and Q in the network shown in the figure is given by:

A)

\[2.5\,\Omega \]

B)

\[7.5\,\Omega \]

C)

\[10\,\Omega \]

D)

\[12.5\,\,\Omega \]

View Answer
11) The magnetic field amplitude of an electromagnetic wave is\[2\times {{10}^{-7}}T\]. Ifs electric field amplitude if the wave is travelling in free space is:

A)

\[6\,V{{m}^{-1}}\]

B)

\[60\text{ }V{{m}^{-1}}\]

C)

\[10/6V{{m}^{-1}}\]

D)

none of these

View Answer
12) A cart is moving horizontally along a straight line with constant speed 30 m/s. A projectile is to be fired form the moving cart in such a way that it will return to the cart after the cart has moved 80 m. At what speed (relative to the cart) must the projectile be fired? (Take\[g=10\text{ }m/{{s}^{2}}\])

A)

10 m/s

B)

\[10\,m/s\]

C)

\[\frac{40}{3}m/s\]

D)

None of these

View Answer
13) A boy begins to walk eastward along a street in front of his house and the graph of his displacement from home is shown in the following figure. His average for the whole time interval is equal to:

A)

8m/mm

B)

6m/min

C)

\[\frac{8}{3}m/\min \]

D)

2 m/min

View Answer
14) What is the potential drop between points A and C in the following circuit? Resistances\[1\,\Omega \]and\[2\,\Omega \]represent the internal resistances of the respective cells.

A)

\[1.75\,V\]

B)

\[2.25\,V\]

C)

\[\frac{5}{4}\,V\]

D)

\[\frac{4}{5}\,V\]

View Answer
15) The escape velocity of a projectile on the earth's surface in\[11.2\text{ }km{{s}^{-1}}\]. A body is projected out with thrice this speed. The speed of the body far away form the earth will be:

A)

\[22.4\text{ }km{{s}^{-1}}\]

B)

\[31.7\text{ }km\text{ }{{s}^{-1}}\]

C)

\[33.6km{{s}^{-1}}\]

D)

none of these

View Answer
16) A body moves along a circular path of radius 10 m and the coefficient of friction is 0.5. What should be its angular speed in rad/s if it is not to slip from the surface? (\[g=9.8\text{ }m{{s}^{-2}}\])

A)

5

B)

10

C)

0.1

D)

0.7

View Answer
17) One end of a string of length (is connected to a particle of mass m and the other to a small peg on a smooth horizontal table. If the particle moves in a circle with speed v, the net force on the particle (directed towards the centre) is:

A)

\[T\]

B)

\[T-\frac{m{{v}^{2}}}{l}\]

C)

\[T+\frac{m{{v}^{2}}}{l}\]

D)

zero T is the tension in the string

View Answer
18) A body is initially at rest. It undergoes one-dimensional motion with constant acceleration. The power delivered to it at time t is proportional to:

A)

\[{{t}^{1/2}}\]

B)

t

C)

\[{{t}^{3/2}}\]

D)

\[{{t}^{2}}\]

View Answer
19) The displacement\[x\]of opal-tide varies with time t as\[x=a{{e}^{-\alpha t}}+b{{e}^{\beta t}}\]where a, b,\[\alpha \]and\[\beta \] are positive constants. The velocity of the particle will:

A)

go on decreasing with time

B)

be independent of\[\alpha \]and\[\beta \]

C)

drop to zero when\[\alpha =\beta \]

D)

go on increasing with time

View Answer
20) Two circular, similar, coaxial loops carry equal currents in the same direction. If the loops are brought nearer, what will happen?

A)

Current will increase in each loop

B)

Current will decrease in each loop

C)

Current will remain same in each loop

D)

Current will increase in one and decrease in the other

View Answer
21) The figure below shows the plot of\[\frac{pV}{nT}\]versus P for oxygen gas at two different temperatures. Read the following statements concerning the above curves: (i) The dotted line corresponds to the 'ideal' gas behaviour. (ii)\[{{T}_{1}}>{{T}_{2}}\] (iii) The value of\[\frac{pV}{nT}\]at the point where the curves meet on the y-axis is the same for all gases. Which of the above statement is true?

A)

(i) only

B)

(i) and (ii) only

C)

All of these

D)

None of these

View Answer
22) A Cannot engine has efficiency 1/5. Efficiency becomes 1/3 when temperature of sink is decreased by 50 K. What is the temperature of sink?

A)

325 K

B)

375 K

C)

300 K

D)

350 K

View Answer
23) A bar magnet has a coercively\[4\times {{10}^{3}}A{{m}^{-1}}\]. It is desired to demagnetize it by inserting it inside a solenoid 12 cm long and having 60 turns. The current carried by the solenoid should be:

A)

8 A

B)

6 A

C)

4.5 A

D)

2 A

View Answer
24) In a series LCR circuit the frequency of a 10 V, AC voltage source is adjusted in such a fashion that the reactance of the inductor measures \[15\,\Omega \]and that of the capacitor\[11\,\Omega \]. If\[R=3\,\Omega \]the potential difference across the series combination of Z, and C will be:

A)

8V

B)

10 V

C)

22V

D)

52V

View Answer
25) A circuit draws 330 W from a 110 V, 60 Hz AC line. The power factor is 0.6 and the current lags the voltage. The capacitance of a series capacitor that will result in a power factor of unity is equal to:

A)

\[31\text{ }\mu F\]

B)

\[\text{54 }\mu F\]

C)

\[\text{151 }\mu F\]

D)

\[\text{201 }\mu F\]

View Answer
26) If the focal length of the lens is 20 cm, what is the distance of the image from the lens in the following figure?

A)

5.5cm

B)

7.5cm

C)

12.0 cm

D)

20.0 cm

View Answer
27) An open\[U-\]tube contains mercury. When 11.2 cm of water is poured into one of the arms of the tube, how high does the mercury rise in the other arm form its initial level?

A)

0.56 cm

B)

1.35 cm

C)

0.41 cm

D)

2.32 cm

View Answer
28) The change in the entropy of a 1 mole of an ideal gas which went through an isothermal process from an initial stat\[({{P}_{1}},{{V}_{1}},T)\]to the final state\[({{P}_{2}},{{V}_{2}},T)\]is equal to:

A)

zero

B)

\[R\,In\,T\]

C)

\[R\,In\,\frac{{{V}_{1}}}{{{V}_{2}}}\]

D)

\[R\,In\,\frac{{{V}_{2}}}{{{V}_{1}}}\]

View Answer
29) An un polarized beam of light is incident on a glass surface at an angle of incidence equal to the polarizing angle of the glass. Read the following statements: (i) The reflected beam is completely polarized. (ii) The refracted beam is partially polarized. (iii) The angle between the reflected and the refracted beams is\[90{}^\circ \]. Which of the above statements is/are true?

A)

(i) only

B)

(ii)only

C)

(i) and (iii)

D)

All statements are correct

View Answer
30) The threshold frequency for certain metal is\[3.3\times {{10}^{14}}Hz\]. If light of frequency\[8.2\times {{10}^{14}}\]Hz is incident on the metal, the cut-off voltage of the photoelectric current will be:

A)

4.9V

B)

3.0V

C)

2.0V

D)

1.0V

View Answer
31) Frequencies higher than 10 MHz were found not being reflected by the ionosphere on a particular day at a place. The maximum electron density of the ionosphere on the day was near to:

A)

\[1.5\times {{10}^{10}}{{m}^{-3}}\]

B)

\[1.24\times {{10}^{12}}{{m}^{-3}}\]

C)

\[3\times {{10}^{12}}{{m}^{-3}}\]

D)

none of these

View Answer
32) The de-Broglie wavelength of an electron, \[\alpha -\]particle and a proton all having the same kinetic energy is respectively given as\[{{\lambda }_{e}},{{\lambda }_{\alpha }}\] and\[{{\lambda }_{p}}\]. Then which of the following is not true?

A)

\[{{\lambda }_{e}}<{{\lambda }_{p}}\]

B)

\[{{\lambda }_{p}}<{{\lambda }_{\alpha }}\]

C)

\[{{\lambda }_{e}}<{{\lambda }_{\alpha }}\]

D)

\[{{\lambda }_{\alpha }}<{{\lambda }_{p}}>{{\lambda }_{e}}\]

View Answer
33) What is the disintegration constant of radon, if the number of its atoms diminishes by 18% in 24 h?

A)

\[2.1\times {{10}^{-3}}{{s}^{-1}}\]

B)

\[2.1\times {{10}^{-4}}{{s}^{-1}}\]

C)

\[2.1\times {{10}^{-5}}{{s}^{-1}}\]

D)

\[2.1\times {{10}^{-6}}{{s}^{-1}}\]

View Answer
34) Which of the following statements is true for an n-type semiconductor?

A)

The donor level lies closely below the bottom of the conduction band

B)

The donor level lies closely above the top of the valence band

C)

The donor level lies at the halfway mark of the forbidden energy gap

D)

None of the above

View Answer
35) Carbon, silicon and germanium have four valence electrons each. These are characterized valence and conduction bands separated by energy band gap respectively equal to\[{{(Eg)}_{C}},{{(Eg)}_{Si}}\]and\[{{(Eg)}_{Ge}}\]. Which of the following statements is true?

A)

\[{{(Eg)}_{C}}={{(Eg)}_{Si}}={{(Eg)}_{Ge}}\]

B)

\[{{(Eg)}_{C}}>{{(Eg)}_{Si}}>{{(Eg)}_{Ge}}\]

C)

\[{{(Eg)}_{C}}<{{(Eg)}_{Ge}}>{{(Eg)}_{Si}}\]

D)

\[{{(Eg)}_{Si}}<{{(Eg)}_{Ge}}>{{(Eg)}_{C}}\]

View Answer
36) A particle executes SHM of amplitude 25 cm and time period 3 s. What is the minimum time required for the particle to move between two points 12.5 cm on either side of the mean position?

A)

0.5s

B)

1.0s

C)

1.5s

D)

2.0s

View Answer
37) The speed of a wave on a string is 150 m/s when the tension is 120 N. The percentage increase in the tension in order to raise the wave speed by 20% is:

A)

44%

B)

40%

C)

20%

D)

10%

View Answer
38) A straight rod length L has one of its ends at the origin and the other at\[x=L\]. If the mass per unit length of the rod is given by Ay where A is constant, where is its mass centre?

A)

\[L/3\]

B)

\[L/2\]

C)

\[2L/3\]

D)

\[3L/4\]

View Answer
39) The image of a small electric bulb fixed on the wall of a room is to be obtained on the opposite wall 4 m away by means of a large convex lens. The maximum possible focal length of the lens required for this purpose will be:

A)

0.5m

B)

1.0m

C)

1.5 m

D)

2.0 m

View Answer
40) The total energy of a satellite moving with an orbital velocity v around the earth is:

A)

\[\frac{1}{2}m{{v}^{2}}\]

B)

\[\frac{-1}{2}m{{v}^{2}}\]

C)

\[m{{v}^{2}}\]

D)

\[\frac{3}{2}m{{v}^{2}}\]

View Answer
41) In hydrogen atom, the electron is moving round the nucleus with velocity\[2.18\times {{10}^{6}}\] m/s in an orbit of radius \[0.528\overset{\text{o}}{\mathop{\text{A}}}\,\]. The acceleration of the electron is:

A)

\[9\times {{10}^{18}}m/{{s}^{2}}\]

B)

\[9\times {{10}^{22}}m/{{s}^{2}}\]

C)

\[9\times {{10}^{-22}}m/{{s}^{2}}\]

D)

\[9\times {{10}^{-12}}m/{{s}^{2}}\]

View Answer
42) When a spring is stretched by a distance\[x,\]it exerts a force given by \[F=(-5x-16{{x}^{3}})N\] The work done, when the spring is stretched from 0.1 m to 0.2 m is:

A)

\[8.7\times {{10}^{-2}}J\]

B)

\[12.2\times {{10}^{-2}}J\]

C)

\[8.1\times {{10}^{-1}}J\]

D)

\[12.2\times {{10}^{-1}}J\]

View Answer
43) A liquid\[X\]of density\[3.36g/c{{m}^{2}}\]is poured in a \[U-\]tube, which contains Hg. Another liquid Y is poured in left arm with height 8 cm, upper levels of\[X\]and Y are same. What is density of Y?

A)

0.8g/cc

B)

1.2g/cc

C)

1.4 g/cc

D)

1.6 g/cc

View Answer
44) If boiling point of water is\[95{}^\circ F,\]what will be reduction at Celsius scale?

A)

\[7{}^\circ C\]

B)

\[65{}^\circ C\]

C)

\[63{}^\circ \text{ }C\]

D)

\[35{}^\circ C\]

View Answer
45) The motion of a particle varies with time according to the relation\[y=a(\sin \omega t+\cos \omega t)\]

A)

the motion is oscillatory but not SHM

B)

the motion is SHM with amplitude a

C)

the motion is SHM with amplitude\[a\sqrt{2}\]

D)

the motion is SHM with amplitude 2a

View Answer
46) Two closed organ pipes A and B, have the same length. A is wider than B. They resonate in the fundamental mode at frequencies n^ and rig respectively, then:

A)

\[{{n}_{A}}={{n}_{B}}\]

B)

\[{{n}_{A}}>{{n}_{B}}\]

C)

\[{{n}_{A}}<{{n}_{B}}\]

D)

either or depending on the ratio of their diameters

View Answer
47) Output W is given by:

A)

\[(X+Y)Z\]

B)

\[(\overline{X}+\overline{Y})Z\]

C)

\[\overline{X}.\overline{Y}+\overline{Z}\]

D)

\[(\overline{X}.\overline{Y})Z\]

View Answer
48) In double slit experiment, the distance between two slits is 0.6 mm and these are illumunated with light of wavelength \[4800\overset{\text{o}}{\mathop{\text{A}}}\,\]. The angular width of first dark fringe on the screen distant 120 cm from slits will be:

A)

\[8\times {{10}^{-4}}rad\]

B)

\[6\times {{10}^{-4}}rad\]

C)

\[4\times {{10}^{-4}}rad\]

D)

\[16\times {{10}^{-4}}rad\]

View Answer
49) If there were no atmosphere, the average temperature on the surface of the earth would be:

A)

lower

B)

higher

C)

same as now

D)

\[0{}^\circ C\]

View Answer
50) The ionization energy of 10 times ionized sodium atom is:

A)

\[\frac{13.6}{11}eV\]

B)

\[\frac{13.6}{112}eV\]

C)

\[13.6\times {{(11)}^{2}}\,eV\]

D)

\[13.6\text{ }eV\]

View Answer
51) Freon used as refrigerant is:

A)

\[C{{F}_{2}}=C{{F}_{2}}\]

B)

\[C{{H}_{2}}{{F}_{2}}\]

C)

\[CC{{l}_{2}}{{F}_{2}}\]

D)

\[C{{F}_{4}}\]

View Answer
52) Formic acid can be distinguished from acetic acid by:

A)

\[NaHC{{O}_{3}}\]

B)

Tollen's reagent

C)

\[NaOH\]

D)

none of these

View Answer
53) Amongst the trihalides of nitrogen which one is the least basic?

A)

\[N{{F}_{3}}\]

B)

\[NC{{l}_{3}}\]

C)

\[NB{{r}_{3}}\]

D)

\[N{{I}_{3}}\]

View Answer
54) Aldol condensation is not given by:

A)

\[C{{H}_{3}}CHO\]

B)

\[HCHO\]

C)

\[C{{H}_{3}}C{{H}_{2}}CHO\]

D)

\[C{{H}_{3}}COC{{H}_{3}}\]

View Answer
55) Which pair is of isoelectronic species?

A)

\[{{K}^{+}},C{{l}^{-}},N{{a}^{+}}\]

B)

\[{{K}^{+}},C{{l}^{-}},C{{a}^{2+}}\]

C)

\[{{F}^{-}},A{{l}^{3+}},{{K}^{+}}\]

D)

\[F{{e}^{2+}},C{{u}^{2+}},{{V}^{3+}}\]

View Answer
56) Glycerol on heating with\[KHS{{O}_{4}}\]gives:

A)

acrolein

B)

formic acid

C)

oxalic acid

D)

allyl alcohol

View Answer
57) Acetaldehyde reacts with chlorine to give:

A)

\[CC{{l}_{4}}\]

B)

\[CHC{{l}_{3}}\]

C)

\[CC{{l}_{3}}.COC{{H}_{3}}\]

D)

\[CC{{l}_{3}}.CHO\]

View Answer
58) Hydrolysis of cyanogen gives:

A)

oxalic acid +\[N{{H}_{3}}\]

B)

oxalic acid

C)

\[N{{H}_{3}}\]

D)

none of these

View Answer
59) Which of the following compound shows optical isomerism?

A)

\[C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ Cl \end{smallmatrix}}{\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{C}}}\,-COOH\]

B)

\[C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{C}}}\,-COOH\]

C)

\[C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{C}}}\,-COOH\]

D)

\[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}OH\]

View Answer
60) Number of primary alcohols of the formula. \[{{C}_{5}}{{H}_{12}}O\]are:

A)

1

B)

4

C)

5

D)

3

View Answer
61) Which enzyme converts sucrose into ethanol?

A)

Diastase

B)

Invertase

C)

Zymase

D)

Both and

View Answer
62) Which acts as auto catalyst during titration of \[KMn{{O}_{4}}\]and oxalic acid in presence\[{{H}_{2}}S{{O}_{4}}\]?

A)

\[{{H}_{2}}S{{O}_{4}}\]

B)

\[KMnS{{O}_{4}}\]

C)

Oxalic acid

D)

\[MnS{{O}_{4}}\]

View Answer
63) \[C{{H}_{3}}\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{C}}}\,CHO\]shows Cannizaro's reaction due to:

A)

carbon is bounded by 3 methyl groups

B)

absence of a-hydrogen atom

C)

due to steric effect

D)

none of the above

View Answer
64) When primary amines react with nitrous acid, the gas evolved is:

A)

\[{{N}_{2}}\]

B)

\[N{{H}_{3}}\]

C)

\[C{{O}_{2}}\]

D)

\[CO\]

View Answer
65) Which is a natural polymer?

A)

Protein

B)

PVC

C)

PMMA

D)

SBR

View Answer
66) "The greater the charge on an ion, the greater its coagulating power" is a statement of:

A)

Tyndall?s effect

B)

Faraday?s law

C)

Mosley?s law

D)

Hardy-SchuIze law

View Answer
67) When ice melts into water, entropy:

A)

becomes zero

B)

decreases

C)

increases

D)

remain same

View Answer
68) If the solubility of\[Pb{{I}_{2}}\]in its saturated solutions at\[25{}^\circ C\]be\[2\times {{10}^{-3}}\] mol/L. Its solubility product is:

A)

\[4\times {{10}^{-9}}\]

B)

\[8\times {{10}^{-12}}\]

C)

\[6\times {{10}^{-9}}\]

D)

\[32\times {{10}^{-9}}\]

View Answer
69) The ionisation potential of nitrogen is greater than oxygen due to:

A)

half-filled 2p-subshell

B)

more electropositive

C)

less electropositive

D)

none of the above

View Answer
70) A radioactive substance decays to,\[\frac{3}{4}\]th of its original value in 30 min. The half-life of the substance is:

A)

60 min

B)

5 min

C)

7.5mm

D)

15 min

View Answer
71) \[I-131\]is used for the treatment of:

A)

thyroid disorders

B)

skin disorders

C)

brain tumour

D)

kidney stones

View Answer
72) Cinnabar is:

A)

\[HgS\]

B)

\[PbS\]

C)

\[Sn{{O}_{2}}\]

D)

\[PbC{{O}_{3}}\]

View Answer
73) Which of the following has least bond angle?

A)

\[{{H}_{2}}O\]

B)

\[{{H}_{2}}S\]

C)

\[{{H}_{2}}Se\]

D)

\[{{H}_{2}}Te\]

View Answer
74) Which molecule is linear in shape?

A)

\[N{{H}_{3}}\]

B)

\[COa\]

C)

\[B{{F}_{3}}\]

D)

\[{{H}_{2}}O\]

View Answer
75) \[CaC{{N}_{2}}+C\]is called as:

A)

urea

B)

thomas slag

C)

nitrolim

D)

triple superphosphate

View Answer
76) Alcoholic solution of KOH is used for:

A)

dehydration

B)

dehydrogenation

C)

dehydrohalogenation

D)

dehalogenation

View Answer
77) \[{{[EDTA]}^{4-}}\]is a:

A)

monodentate ligand

B)

bidentate ligand

C)

quadridentate ligand

D)

hexadentate ligand

View Answer
78) 2.76g of silver carbonate on being strongly heated yield a residue weighing:

A)

2.16 g

B)

2.48 g

C)

2.64 g

D)

2.32 g

View Answer
79) A cylinder of gas supplied by Bharat petroleum is assumed to contain 14 kg of butane. It is normal family requires 20,000 kJ of energy per day for cooking, butane gas in the cylinder last for......... days. (\[\Delta H,\]of \[{{C}_{4}}{{H}_{10}}=-2658\text{ }kJ\]per mol)

A)

15 days

B)

20 days

C)

32 days

D)

40 days

View Answer
80) After losing a number of\[\alpha \]and \[\beta \]-particles \[_{92}{{U}^{238}}\]is changed to 32 Pb206. The total number of\[\alpha \]-particles lost in this process is:

A)

10

B)

5

C)

8

D)

32

View Answer
81) Which type of bond is present in\[{{H}_{2}}S\]molecule?

A)

Ionic bond

B)

Covalent bond

C)

Co-ordinate bond

D)

All of the above

View Answer
82) Anon-ideal solution was prepared by mixing 30 mL chloroform and 50 mL acetone. The volume of mixture will be:

A)

> 80 mL

B)

< 80 mL

C)

= 80 mL

D)

> 80 mL

View Answer
83) For the reaction\[A+B\xrightarrow[{}]{{}}C,\]it found that doubling the concentration of A increases the rate by 4 times, and doubling the concentration of B doubles the reaction rate. What is the overall order of the reaction?

A)

4

B)

3/2

C)

3

D)

1

View Answer
84) Na and Mg crystallize in bcc and fee type crystals respectively, then the number of atoms of Na and Mg present in the unit cell of their respective crystal is:

A)

4 and 2

B)

9 and 14

C)

14 and 9

D)

2 and 4

View Answer
85) The pH of 0.1M solution of the following salts increases in the order:

A)

\[NaCl<N{{H}_{4}}Cl<NaCN<HCl\]

B)

\[HCl<N{{H}_{4}}Cl<NaCl<NaCN\]

C)

\[NaCN<N{{H}_{4}}Cl<NaCl<HCl\]

D)

\[HCl<NaCl<NaCN<N{{H}_{4}}Cl\]

View Answer
86) The compound in which cation is isoelectronic with anion is:

A)

\[NaCl\]

B)

\[CsF\]

C)

\[NaI\]

D)

\[{{K}_{2}}S\]

View Answer
87) Which process of purification is represented by the following scheme? \[\underset{impure}{\mathop{Ti}}\,+2{{I}_{2}}\xrightarrow[{}]{{{250}^{o}}C}Ti{{I}_{4}}\xrightarrow[{}]{{{1400}^{o}}C}\underset{pure}{\mathop{Ti}}\,+{{I}_{2}}\]

A)

Cupellation

B)

Poling

C)

Electrolytic refining

D)

Van-Arkel process

View Answer
88) Bredig arc method cannot be used to prepare colloidal solution of which of the following?

A)

Pt

B)

Fe

C)

Ag

D)

Au

View Answer
89) In alkaline medium\[Cl{{O}_{2}}\]oxidize\[{{H}_{2}}{{O}_{2}}\]in\[{{O}_{2}}\]and reduced itself in\[C{{l}^{-}}\]then how many moles of\[{{H}_{2}}{{O}_{2}}\]will oxidize by one mole of\[Cl{{O}_{2}}\]?

A)

1.0

B)

1.5

C)

2.5

D)

3.5

View Answer
90) For the electrochemical cell,\[M|{{M}^{+}}||{{X}^{-}}|X,{{E}^{o}}({{M}^{+}}/M)=0.44\,V\]and \[E{}^\circ (X/{{X}^{-}})=0.33\text{ }V\]. From this data one can deduce that:

A)

\[M+X\to {{M}^{+}}+{{X}^{-}}\]is the spontaneous reaction

B)

\[{{M}^{+}}+{{X}^{-}}\to M+X\]is the spontaneous reaction

C)

\[{{E}_{cell}}=0.77V\]

D)

\[{{E}_{cell}}=-0.77V\]

View Answer
91) Potassium is kept in:

A)

alcohol

B)

water

C)

kerosene

D)

liquid ammonia

View Answer
92) Which of the following is not obtained by direct reaction of constituent elements?

A)

\[Xe{{F}_{2}}\]

B)

\[Xe{{F}_{4}}\]

C)

\[Xe{{O}_{3}}\]

D)

\[XeFe\]

View Answer
93) The reagent which forms crystalline osazone derivative when reacted with glucose is:

A)

Fehling solution

B)

phenyl hydrazine

C)

Benedict solution

D)

hydroxylamine

View Answer
94) The volume of a gas decreases from 500 cc to 300 cc when a sample gas is compressed by an average pressure of 0.6 atm. During this process 10 J of heat is liberated. The change in internal energy is:

A)

\[-2.16J\]

B)

\[12.156\text{ }J\]

C)

\[2.16J\]

D)

\[101.3\text{ }J\]

View Answer
95) Benzaldehyde condenses with N, N-dimethyla- niline in presence of anhydrous \[ZnC{{l}_{2}}\]to give:

A)

Michler?s ketone

B)

azo-dye

C)

malachite green

D)

buffer yellow

View Answer
96) Which of the following cannot be used in Friedel-Craft?s reaction?

A)

\[FeC{{l}_{3}}\]

B)

\[FeB{{r}_{2}}\]

C)

\[AlC{{l}_{3}}\]

D)

\[NaCl\]

View Answer
97) A gaseous hypothetical chemical equation\[2A4B+C\]is carried out in a closed vessel. The concentration of B is found to increase by\[5\times {{10}^{-3}}mol\text{ }{{L}^{-1}}\]in 10 s. The rate of appearance of B is:

A)

\[5\times {{10}^{-4}}mol\text{ }{{L}^{-1}}{{s}^{-1}}\]

B)

\[5\times {{10}^{-5}}mol\,{{L}^{-1}}{{s}^{-1}}\]

C)

\[6\times {{10}^{-5}}mol\,{{L}^{-1}}{{s}^{-1}}\]

D)

\[4\times {{10}^{-4}}mol\,{{L}^{-1}}{{s}^{-1}}\]

View Answer
98) Which of the following colligative properties can provide molar mass of proteins (or polymers or colloids) with greater precision?

A)

Relative lowering of vapour pressure

B)

Elevation in boiling point

C)

Depression in freezing point

D)

Osmotic pressure

View Answer
99) In compound X, all the bond angles are exactly\[{{109}^{o}}28,X\]is:

A)

chloromethane

B)

iodoform

C)

carbon tetrachloride

D)

chloroform

View Answer
100) Glass is:

A)

super cooled liquid

B)

crystalline solid

C)

amorphous solid

D)

liquid crystal

View Answer
101) In malaria, the product released by mosquito into blood that causes chill and fever, is called :

A)

heamatin

B)

Schuffner's dots

C)

haemozoin

D)

haemotoxin

View Answer
102) In Amoeba, the contractile vacuole is present:

A)

near the trailing end

B)

near the advancing end

C)

at the middle of the body

D)

any where inside the body

View Answer
103) The trisomy for 21st chromosome is called :

A)

Down's syndrome

B)

Turner's syndrome

C)

Sickle cell anaemia

D)

Klinefelter's syndrome

View Answer
104) 'Mammalian thymus' is mainly concerned with :

A)

regulation of body temperature

B)

regulation of body growth

C)

immunological functions

D)

secretion of thyrotropin

View Answer
105) Which of the following is the largest gland in an adult man?

A)

Thymus

B)

Liver

C)

Thyroid

D)

Pancreas

View Answer
106) In Pheretima, septa are absent between which segments?

A)

3/4 and 9/10

B)

4/5 and 8/9

C)

5/6 and 7/8

D)

7/8 and 6/7

View Answer
107) During emergency which of the following hormone is secreted?

A)

Aldosterone

B)

Thyroxine

C)

Adrenaline

D)

Calcitonin

View Answer
108) In which of the following animals, respiration occurs without any respiratory organ ?

A)

frog

B)

fish

C)

cockroach

D)

earthworm

View Answer
109) In cockroach, larval and nymphal characters are maintained by :

A)

ecdysone

B)

salivary glands

C)

parotid gland

D)

juvenile hormone

View Answer
110) Which of the following is a transparent tissue ?

A)

Tendon

B)

Fibrous cartilage

C)

Hyaline cartilage

D)

All of these

View Answer
111) Rh factor is present in :

A)

all vertebrates

B)

all mammals

C)

all reptiles

D)

man and rhesus monkey only

View Answer
112) In rabbit, end of a long bone is connected to another by:

A)

tendon

B)

ligaments

C)

muscle

D)

  cartilage

View Answer
113) Which of the following cell type is capable of giving rise to other cell types in sponges ?

A)

thesocytes

B)

pinacocytes

C)

cnidocytes

D)

archaeocytes

View Answer
114) Thigmotaxis is not shown by:

A)

Poramecium

B)

Amoeba

C)

Ascaris

D)

Hydra

View Answer
115) Which is correctly matched ?

A)

Apiculture?honey bee

B)

Pisciculture?silk moth

C)

Sericulture?fish

D)

Aquaculture?mosquito

View Answer
116) Changes that allow the conversion of larva into adult, is called :

A)

metagenesis

B)

alternation

C)

metamorphosis

D)

metastasis

View Answer
117) Which of the following is secreted by mast cell ?

A)

Histamine

B)

Heparin

C)

Serotonin

D)

All of these

View Answer
118) 5th cranial nerve of frog is called :

A)

optic nerve

B)

vagus

C)

trigeminal

D)

ophthalmic

View Answer
119) Animals having a built in thermostat to maintain constant body temperature are known as :

A)

biothermic

B)

poikilothermic

C)

oligothennic

D)

homeothermic

View Answer
120) In earthworm, neurons are:

A)

motor

B)

associated

C)

sensory

D)

all of these

View Answer
121) In sex linkage, the speciality is :

A)

atavism

B)

criss-cross inheritance

C)

reversion

D)

gene flow

View Answer
122) Vitamin-D is synthesized in skin by the action of sunlight on :

A)

cholesterol

B)

7-hydroxy cholesterol

C)

cephalin cholesterol

D)

all of the above

View Answer
123) The intermediate host of Schistosoma to :

A)

snail

B)

mosquito

C)

housefly

D)

sheep

View Answer
124) The islets of Langerhans are found in :

A)

pancreas

B)

stomach

C)

liver

D)

alimentary canal

View Answer
125) In Klinefelter's syndrome, the sex chromosome compliment is :

A)

22 A + XXY

B)

22 A + XO

C)

22A + XY

D)

22 A + XX

View Answer
126) Lymphoid tissue is found in :

A)

thymus

B)

tonsils

C)

lymph nodes

D)

all of these

View Answer
127) Most widely used bioweapon is :

A)

Bacillus subtilis

B)

Pseudomonos putida

C)

Bacillus anthracis

D)

none of the above

View Answer
128) The vitamin which is essential for blood dotting is:

A)

vitamin-A

B)

vitamin-B

C)

vitamin-C

D)

vitamin-K

View Answer
129) The female genital pore of Phererima posthuma located upon the segment ?

A)

14th

B)

16th

C)

18th

D)

15th

View Answer
130) Polyp phase is absent in :

A)

Hydra

B)

Aurelia

C)

Physalia

D)

Obelia

View Answer
131) In frog heart, there are cardiac muscles which consist of fibres called :

A)

Purkinje fibres

B)

my onemes

C)

telodendria

D)

columnae camae

View Answer
132) Malpighian tubules are :

A)

excretory organs of insects

B)

excretory organs of frog

C)

respiratory organs of insects

D)

endocrine glands of insects

View Answer
133) Pacemaker is:

A)

AV node

B)

SA node

C)

bundle of His

D)

Purkinje fibres

View Answer
134) LH and FSH are collectively called :

A)

oxytocin

B)

somatotrophins

C)

luteotrophic

D)

gonadotrophins

View Answer
135) Who is known as "father of Endocrinology" ?

A)

R.H. Whittaker

B)

Pasteur

C)

Einthoven

D)

Thomas Addison

View Answer
136) Which of the following provides most evident proof of evolution ?

A)

Fossils

B)

Morphology

C)

Embryo

D)

Vestigial organs

View Answer
137) In Mollusca, eye is present over a stalk, called :

A)

ostractum

B)

operculum

C)

ommatophores

D)

osphradium

View Answer
138) Among the following, colonial insects are :

A)

locusts

B)

mosquitoes

C)

white ants

D)

bed bug

View Answer
139) In Ascaris, the coelom is :

A)

schizocoelom

B)

pseudocoelom

C)

true coelom

D)

haemocoelom

View Answer
140) Turbellarians' are free living :

A)

nematodes

B)

cestodes

C)

flat worms

D)

trematodes

View Answer
141) The characteristic larva of phylum Coelemerata' is :

A)

planula

B)

cysricercus

C)

rhabdiform

D)

wriggler

View Answer
142) Podocytes are the cells, present in :

A)

cortex of nephron

B)

inner wall of Bowman's capsule

C)

outer wall of Bowman's capsule

D)

wall of glomerular capillaries

View Answer
143) In rabbit, head of epididymis present at the head of the testis is called :

A)

vas deferens

B)

cauda epididymis

C)

gubemaculum

D)

caput epididymis

View Answer
144) Tendons and ligaments are specialized types of:

A)

nervous tissue

B)

muscular tissue

C)

epithelial tissue

D)

fibrous connective tissue

View Answer
145) In blood, \[C{{O}_{2}}\]is transported majorly as :

A)

sodium carbonate

B)

carboxy haemoglobin

C)

bicarbonate

D)

\[C{{O}_{2}}\] as such

View Answer
146) Animals undergoes inactive stage during winter, is known as :

A)

aestivarion

B)

hibernation

C)

adaptation

D)

acclimirization

View Answer
147) Kupffer cells are present in :

A)

liver

B)

small intestine

C)

pancreas

D)

thyroid gland

View Answer
148) The embryo at 16 celled stage is known as ;

A)

morula

B)

gastrula

C)

blastula

D)

blastomere

View Answer
149) Contractile vacuole in protozoan Amoeba is meant for :

A)

respiration

B)

excretion

C)

locomotion

D)

osmoregulation

View Answer
150) In which of the following, putrefying bacteria is present ?

A)

intestine

B)

colon

C)

stomach

D)

liver

View Answer
151) Jumping genes in maize were discovered by :

A)

Hugo de Vries

B)

Barbara Me Clintock

C)

T.H. Morgan

D)

Mendel

View Answer
152) Streptomycin is obtained from :

A)

S. treptomyces griseus

B)

S. aureofaciens

C)

S. venezuelae

D)

S. ramosus

View Answer
153) Binomial system of nomenclature was given by:

A)

Julian Huxley

B)

Bentham and Hooker

C)

Linnaeus

D)

Casper Bauhin

View Answer
154) Morphine obtained from Opium is :

A)

latex

B)

pome

C)

alkaloid

D)

tannin

View Answer
155) Indusium is found in :

A)

algae

B)

ferns

C)

moss

D)

Cycas

View Answer
156) The vacuole is lined by a membrane called :

A)

tonoplast

B)

jacket

C)

cell membrane

D)

tonoplasm

View Answer
157) Agar-agar is obtained from :

A)

Chlorella

B)

Spirogyra

C)

Ulothrix

D)

Gelidium

View Answer
158) Effect of pollution is observed first on :

A)

micro-organisms

B)

food crop

C)

green vegetation

D)

herbivores

View Answer
159) DNA element with ability 10 change its position, is called:

A)

caisson

B)

transposon

C)

intron

D)

recon

View Answer
160) Initiation codon is :

A)

\[\text{UUU}\]

B)

\[\text{UGA}\]

C)

\[\text{AUG}\]

D)

\[\text{UAG}\]

View Answer
161) DNA multiplication is called :

A)

translation

B)

replication

C)

transduction

D)

transcription

View Answer
162) Duramen is present in :

A)

inner region of secondary wood

B)

pan of sap wood

C)

outer region of secondary wood

D)

region of pericycle

View Answer
163) In plants, water supply is due to :

A)

osmosis

B)

imbibition

C)

guttation

D)

adhesion force

View Answer
164) Programmed cell death is scientifically termed as:

A)

autotomy

B)

cell lysis

C)

apoptosis

D)

none of these

View Answer
165) Paraffin wax is :

A)

ester

B)

acid

C)

monohydric alcohol

D)

cholesterol

View Answer
166) Medicine for curing respiratory problems is obtained from :

A)

Ephedra

B)

Calotrop is

C)

Eucalyptus

D)

Can aft is

View Answer
167) In Funaria, stomata are present on the :

A)

stem

B)

leaves

C)

capsule

D)

apophysis

View Answer
168) The process after glycolysis in anaerobic respiration is known as :

A)

fermentation

B)

respiration

C)

Krebs cycle

D)

decomposition

View Answer
169) Which is always present in photochemical smog?

A)

\[{{O}_{3}}\]

B)

\[C{{O}_{2}}\]

C)

\[S{{O}_{2}}\]

D)

\[C{{H}_{4}}\]

View Answer
170) Which crop utilises solar energy most efficiently?

A)

Potato

B)

Sugarcane

C)

Wheat

D)

Rice

View Answer
171) Viral genome in coporated host DNA is called :

A)

prophase

B)

prophage

C)

bacteriophage

D)

none of these

View Answer
172) In cell cycle, during which phase, chromosomes are arranged in equatorial plate?

A)

Metaphase

B)

Anaphase

C)

Telophase

D)

Prophase

View Answer
173) The soil which is transported by wind is known as:

A)

colluvial

B)

  eolian

C)

alluvial

D)

glacial soil

View Answer
174) Spindle fibre is made up of:

A)

tubulin

B)

humulin

C)

intermediate filament

D)

flagellin

View Answer
175) The yielding of rice is increased by :

A)

Azolla

B)

Nostoc

C)

Anabaena

D)

Clostridium

View Answer
176) Lichen is the pioneer vegetation on which succession?

A)

hydrosere

B)

lithosere

C)

psammosere

D)

xerosere

View Answer
177) Law of limiting factor was given by:

A)

Leibig

B)

Blackman

C)

Calvin

D)

Amon

View Answer
178) In Pinus, male cone bears a large number of:

A)

ligules

B)

anthers

C)

  micro-sporophylls

D)

mega-sporophylls

View Answer
179) Insectivorous plants grow in soil:

A)

rich in nitrates

B)

rich in phosphates

C)

deficient in nitrates

D)

rich in calcium

View Answer
180) Induction of flowering by low temperature treatment is :

A)

vernalisation

B)

cryobiology

C)

photoperiodism

D)

pruning

View Answer
181) Decomposers are :

A)

autotrophs

B)

autoheterotrophs

C)

organotrophs

D)

heterotrophs

View Answer
182) 'Club moss' belongs to :

A)

Algae

B)

Pteridophyta

C)

Fungi

D)

Bryophyta

View Answer
183) Cleavage polyembryony occurs in :

A)

Pinus

B)

Mini Cyan

C)

Cycas

D)

Ephedra

View Answer
184) Edible part of mushroom is :

A)

basidiocarp

B)

secondary mycelium

C)

primary mycelium

D)

ternary mycelium

View Answer
185) Which is the major crop in Asia?

A)

Rice

B)

Sugarcane

C)

Jowar

D)

Millet

View Answer
186) Most nutritious among the following is :

A)

wheat

B)

maize

C)

bajra

D)

rice

View Answer
187) Which of the following plant product is the hardest?

A)

Lignin

B)

Cutin

C)

Suberin

D)

Sporopollenin

View Answer
188) 'Ruminate endosperm' is found in :

A)

Cruciferae

B)

Asteraceae

C)

Euphorbiaceae

D)

Annonaceae

View Answer
189) Guttarion is due to :

A)

transpiration

B)

root pressure

C)

osmosis

D)

diffusion

View Answer
190) The following is used to get desired breed of plants.

A)

tissue culture

B)

genetic engineering

C)

inbreeding

D)

ikebana

View Answer
191) For production of haploids, we culture :

A)

shoot tip

B)

anther

C)

root tip

D)

none of these

View Answer
192) Calyptra is derived from :

A)

archegonia

B)

capsule

C)

antheridia

D)

columella

View Answer
193) Late blight of potato is caused by :

A)

Ustilago

B)

Pseudomonas

C)

Phytophchora infestans

D)

Colletotricum falcatum

View Answer
194) 'Clamp connection' are observed in :

A)

Basidiomycetes

B)

Zygomycetes

C)

Ascomycetes

D)

Oomyceles

View Answer
195) Leaf abscission is caused by :

A)

ABA

B)

cytokinin

C)

auxin

D)

gibberellins

View Answer
196) What is the main cause for the extinction of some species in tropical forest?

A)

Deforestation

B)

Afforestation

C)

Pollution

D)

Soil erosion

View Answer
197) Wilting of plant is due to :

A)

blockage of phloem

B)

blockage of xylem

C)

when some root and phloem are removed

D)

tracheid is blocked

View Answer
198) Most accepted theory for ascent of sap is :

A)

capillarity theory

B)

root pressure theory

C)

pulsation theory

D)

transpiration pull

View Answer
199) Which enzyme converts glucose into alcohol?

A)

Zymase

B)

Diastase

C)

Invertase

D)

Lipase

View Answer
200) Crop rotation helps in :

A)

increase soil fertility

B)

decrease soil erosion

C)

decrease soil fertility

D)

decrease water loss

View Answer

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done BHU PMT (Screening) Solved Paper-2006 Total Questions - 200

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BHU PMT (Screening) Solved Paper-2006 Total Questions - 200