Solved papers for BCECE Medical BCECE Medical Solved Papers-2011

BCECE Medical Solved Papers-2011 Total Questions - 150

1) Which of the following pairs have identical dimensions?

A)

Momentum and force

B)

Pressure and surface tension

C)

Moment of force and angular momentum

D)

Surface tension and surface energy

View Answer
2) A train 100 m long travelling at 40 m/s starts overtaking another train 200 m long travelling at 30 m/s. The time taken by the first train to pass the second train completely is

A)

30s

B)

40s

C)

50s

D)

60s

View Answer
3) A constant power P is applied to a particle of mass m. The distance travelled by the particle when its velocity increases from \[{{v}_{1}}\] to \[{{v}_{2}}\] is (neglect friction)

A)

\[\frac{m}{3P}(v_{2}^{3}-v_{1}^{3})\]

B)

\[\frac{m}{3P}({{v}_{2}}-{{v}_{1}})\]

C)

\[4.32\times {{10}^{6}}\]

D)

\[\frac{m}{3P}(v_{2}^{2}-v_{1}^{2})\]

View Answer
4) A spring of constant \[5\times {{10}^{3}}\] N/m is stretched initially by 5 cm from the unstretched position. Then the work required to stretch it further by another 5 cm is

A)

6.25 Nm

B)

12.5 Nm

C)

18.75 Nm

D)

25.00 Nm

View Answer
5) Four spheres each having mass m and radius rare placed with their centres on the four corners of a square of side a. Then the moment of inertia of the system about an axis along one of the sides of the square is

A)

\[\frac{8}{5}\,m{{r}^{2}}\]

B)

\[\frac{8}{5}\,m{{r}^{2}}+m{{a}^{2}}\]

C)

\[\frac{8}{5}\,m{{r}^{2}}+2\,\,m{{a}^{2}}\]

D)

\[\frac{4}{5}\,m{{r}^{2}}+4\,\,m{{a}^{2}}\]

View Answer
6) If an artificial satellite is moving in a circular orbit around the earth with a speed equal to half the magnitude of the escape velocity from the earth, the height of the satellite above the surface of the earth is

A)

2R

B)

R

C)

R

D)

R

View Answer
7) A 2 kg copper block is heated to \[{{500}^{o}}C\] and then it is placed on a large block of ice at \[{{0}^{o}}C\]. If the specific heat capacity of copper is 400 J/kg/C and latent heat of water is \[3.5\times {{10}^{5}}\] J/kg\ The amount of ice that can melt is

A)

7/8 kg

B)

7/5 kg

C)

8/7 kg

D)

5/7 kg

View Answer
8) Number of waves in 8 cm of vacuum is same as number of waves in \[x\] cm of a medium. Refractive index of medium is 4/3, then the value \[x\] is

A)

32/3 cm

B)

12cm

C)

6 cm

D)

4 cm

View Answer
9) Consider a gas with density p and c as the root mean square velocity of its molecules contained in a volume. If the system moves as whole with velocity v, then the pressure exerted by the gas is

A)

\[\frac{1}{3}\rho {{\overline{c}}^{2}}\]

B)

\[\frac{1}{3}\rho {{(c+v)}^{2}}\]

C)

\[\frac{1}{3}\rho {{(\overline{c}-v)}^{2}}\]

D)

\[\frac{1}{3}\rho \,\,{{(\overline{c}-v)}^{2}}\]

View Answer
10) At \[{{127}^{o}}C\] radiated energy is \[2.7\times {{10}^{-3}}\] J/s. At what temperature radiated energy is \[4.32\times {{10}^{6}}\]J/s?

A)

400 K

B)

4000 K

C)

80000 K

D)

40000 K

View Answer
11) The minimum phase difference between two simple harmonic oscillations, \[{{y}_{1}}=\frac{1}{2}\sin \omega \,t+\frac{\sqrt{3}}{2}\cos \,\omega \,t\] \[{{y}_{2}}=\sin \omega \,t+\cos \,\omega \,t\], is

A)

\[\frac{7\pi }{12}\]

B)

\[\frac{\pi }{12}\]

C)

\[\frac{-\pi }{6}\]

D)

\[\frac{\pi }{6}\]

View Answer
12) A rubber cord catapult has cross-sectional area 25 mm2 and initial length of rubber cord is 10 cm. It is stretched to 5 cm and then released to project a missile of mass 5 g. Taking\[{{Y}_{ruber}}=5\times {{10}^{8}}N{{m}^{-2}}\], velocity of projected missile is

A)

20 \[m{{s}^{-1}}\]

B)

100 \[m{{s}^{-1}}\]

C)

250 \[m{{s}^{-1}}\]

D)

200 \[m{{s}^{-1}}\]

View Answer
13) The material of a wire has a density of 1.4 g/\[c{{m}^{3}}\]. If it is not wetted by a liquid of surface tension 44 dyne/cm, then the maximum radius of the wire which can float on the surface of liquid is

A)

\[\frac{10}{28}\]cm

B)

\[\frac{10}{14}\]cm

C)

\[\frac{10}{7}\]mm

D)

0.7 cm

View Answer
14) Binding energy of satellite is \[4\times {{10}^{8}}J\], Its PE is

A)

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

B)

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

C)

\[8\times {{10}^{8}}J\]

D)

\[4\times {{10}^{8}}J\]

View Answer
15) A current of 0.01 mA passes through the potentiometer wire of a resistivity of \[{{10}^{9}}\Omega \] cm and area of cross-section \[{{10}^{-2}}\,c{{m}^{2}}\]. The potential gradient is

A)

\[{{10}^{9}}V/m\]

B)

\[{{10}^{11}}V/m\]

C)

\[{{10}^{10}}V/m\]

D)

\[{{10}^{8}}V/m\]

View Answer
16) A particle of mass m attached with a string of length I is just revolving on the vertical circle without slacking of the string. If \[{{v}_{A}}\], Vg and \[{{v}_{D}}\]are speeds at positions A, B and D, then

A)

\[{{v}_{B}}>{{v}_{D}}>{{v}_{A}}\]

B)

tension in string at D = 3 mg

C)

\[{{v}_{D}}=\sqrt{3gl}\]

D)

All of the above

View Answer
17) A bucket of water is being revolved in vertical circle of radius 1 m. Minimum frequency required to prevent the. water from getting down the path is \[(g=10\,\,m/{{s}^{2}})\]

A)

\[\frac{2\pi }{\sqrt{10}}\]

B)

\[\frac{2\pi }{\sqrt{5}}\]

C)

\[\frac{\sqrt{10}}{2\pi }\]

D)

\[\frac{\sqrt{5}}{2\pi }\]

View Answer
18) A round disc of moment of inertia \[{{I}_{2}}\] about its axis perpendicular to its plane and passing through its centre is placed over another disc of moment of inertia \[{{l}_{1}}\] rotating with an angular velocity co about the same axis. The final angular velocity of the combination of discs is

A)

\[\frac{{{I}_{2}}\,\,\omega }{{{I}_{1}}+{{I}_{2}}}\]

B)

\[\omega \]

C)

\[\frac{{{I}_{1}}\,\,\omega }{{{I}_{1}}+{{I}_{2}}}\]

D)

\[\frac{({{I}_{1}}+{{I}_{2}})\,\omega }{{{I}_{1}}}\]

View Answer
19) Two discs have same mass and thickness Their materials are of densities \[{{\rho }_{1}}\] and \[{{\rho }_{2}}\]. The ratio of their moment of inertia about central axis will be

A)

\[{{\rho }_{1}}:{{\rho }_{2}}\]

B)

\[{{\rho }_{1}}:{{\rho }_{2}}:1\]

C)

\[1:{{\rho }_{1}}\,\,{{\rho }_{2}}\]

D)

\[{{\rho }_{2}}:{{\rho }_{1}}\]

View Answer
20) A 4 m long wire of resistance \[8\,\Omega \] is connected in series with a battery of emf 2 V and a resistor of \[7\,\Omega \]. The internal resistance of the battery is \[1\,\,\Omega \]. What is the potential gradient along the wire?

A)

1, 00 \[V{{m}^{-1}}\]

B)

0,75 \[V{{m}^{-1}}\]

C)

0.50 \[V{{m}^{-1}}\]

D)

0.25 \[V{{m}^{-1}}\]

View Answer
21) A uniform wire of \[16\,\,\Omega \] resistance is made into the form of a square. Two opposite corners of the square are connected by a wire of resistance \[16\,\,\Omega \]. The effective resistance between the other two opposite corners is

A)

\[32\,\,\Omega \]

B)

\[16\,\,\Omega \]

C)

\[8\,\,\Omega \]

D)

\[4\,\,\Omega \]

View Answer
22) A \[6\times {{10}^{-4}}F\] parallel plate air capacitor is connected to a 500 V battery. When air is replaced by another dielectric material, \[7.5\times {{10}^{-4}}C\] charge flows into the capacitor. The value of the dielectric constant of the material is

A)

1.5

B)

2.0

C)

1.0025

D)

3.5

View Answer
23) The 90 pF capacitor is connected to a 12 V battery. How many electrons are transferred from one plate to another?

A)

\[1.1\times {{10}^{9}}\]

B)

\[6.7\times {{10}^{9}}\]

C)

\[4\times {{10}^{19}}\]

D)

\[5\times {{10}^{19}}\]

View Answer
24) Given mass number of gold =197, Density of gold = 19.7 \[g/c{{m}^{3}}\] Avogadros number \[=6\times {{10}^{23}}\]. The radius of the gold atom is approximately

A)

\[1.5\times {{10}^{-8}}m\]

B)

\[1.7\times {{10}^{-9}}m\]

C)

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

D)

\[1.5\times {{10}^{-12}}m\]

View Answer
25) In Youngs double slit experiment, two slits are separated by 1 m. The slits are illuminated by a light of wavelength 650 nm. The source of light is placed symmetrically with respect to the two slits. Interference pattern is observed on a screen at a distance of 1 m from the slits. The distance between the third dark fringe and the fifth bright fringe from the centre of the pattern will be

A)

1.62 mm

B)

2.62 mm

C)

5.62 mm

D)

3.62 mm

View Answer
26) R is a radius of a planet and p is its density. The escape velocity on its surface will be

A)

\[{{R}^{2}}\sqrt{4\pi G\rho /3}\]

B)

\[R\sqrt{4\pi G\rho /3}\]

C)

\[{{R}^{2}}\sqrt{8\pi G\rho /3}\]

D)

\[R\sqrt{8\pi G\rho /3}\]

View Answer
27) A satellite is moving in a circular orbit at a certain height above the earths surface. It takes \[5.26\times {{10}^{3}}s\] to complete one revolution with a centripetal acceleration equal to 9.32\[m/{{s}^{2}}\]. The height of satellite orbiting above the earth is (Earths radius \[=6.37\times {{10}^{6}}m\])

A)

220 km

B)

160 km

C)

70km

D)

120 km

View Answer
28) The surface tension of soap solution is 0.03 N/m. The amount of work done in forming a bubble of radius 5 cm is

A)

3.77 J

B)

1.885 J

C)

\[0.95\times {{10}^{-3}}J\]

D)

\[1.9\times {{10}^{-3}}J\]

View Answer
29) The minimum velocity of capillary waves on the surface of water is (surface tension of water \[=7.2\times {{10}^{-2}}\] N/m)

A)

0.23 m/s

B)

0.46 m/s

C)

0.69 m/s

D)

0.92 m/s

View Answer
30) A wire has a breaking stress of \[6\times {{10}^{5}}N/{{m}^{2}}\] and a density of \[3\times {{10}^{4}}kg/{{m}^{3}}\]. The length of the wire of the same material which will break under its own weight, (if \[g=10\,m/{{s}^{2}}\]) is

A)

2000m

B)

2500m

C)

20m

D)

2m

View Answer
31) A man measures the period of simple pendulum inside a stationary-lift and finds it to be T second. If the lift accelerates downwards with acceleration of \[\frac{g}{4}\], the period of oscillation will be

A)

\[T\times \frac{\sqrt{3}}{2}\,s\]

B)

\[T\times \frac{2}{\sqrt{3}}\,s\]

C)

\[\frac{T}{2}s\]

D)

\[\sqrt{T}\,s\]

View Answer
32) A spherical black body with a radius of 12 cm radiates 450 W power at 500 K. If the radius were halved and temperature be doubled, the power radiated in watt would be

A)

1800

B)

900

C)

3600

D)

850

View Answer
33) If the emissive power of black surface at same temperature is 400 \[W/{{m}^{2}}\], the emissive and absorptive powers of the surface assuming it was initially ordinary surface, are (Given, Mass of the body m = 4.2 kg, Area of body \[=5\times {{10}^{-2}}{{m}^{2}}\], Rate of cooling \[\frac{d\theta }{dt}=\frac{1}{12}\times {{10}^{-2}}{{\,}^{o}}C/\min \] Specific heat \[s=420J/kg{{\,}^{o}}C\])

A)

e = a = 0.0735

B)

e = a = 0.0435

C)

e = a = 0.0535

D)

e = a = 0.0235

View Answer
34) The expression for total kinetic energy per unit volume of gas is

A)

\[\frac{E}{V}=\frac{p}{2}\]

B)

\[\frac{E}{V}=\frac{1}{3}p\]

C)

\[\frac{E}{V}=\frac{2}{3}p\]

D)

\[\frac{E}{V}=\frac{3}{2}p\]

View Answer
35) A vessel contains a mixture of one mole of oxygen and two moles of nitrogen at 300 K. The ratio of the average rotational KE per oxygen molecule that per nitrogen molecule is

A)

1 : 1

B)

1 : 2

C)

2 : 1

D)

depends on the moments of inertia of the two molecules

View Answer
36) The wavelength and frequency of beam of light in water of refractive index 4/3 having wavelength 0.48 micron in air are

A)

\[0.16\times {{10}^{-6}}m,\,\,6.25\times {{10}^{14}}Hz\]

B)

\[0.36\times {{10}^{-6}}m,\,\,6.25\times {{10}^{14}}Hz\]

C)

\[0.36\times {{10}^{-6}}m,\,\,3.25\times {{10}^{14}}Hz\]

D)

\[0.26\times {{10}^{-6}}m,\,\,6.25\times {{10}^{14}}Hz\]

View Answer
37) A ray of light is incident on glass slab making an angle of incidence \[{{\sin }^{-1}}\left( \frac{\sqrt{3}}{2} \right)\]. What will be the angle of refraction in glass of refractive index 1.5?

A)

\[{{40}^{o}}\,18\]

B)

\[{{24}^{o}}\,49\]

C)

\[{{25}^{o}}\,17\]

D)

\[{{35}^{o}}\,16\]

View Answer
38) An electron at rest is accelerated through a potential difference of 200 V. If the electron acquires a velocity \[8.4\times {{10}^{6}}\] m/s, the value of e/m of electron is

A)

\[1.76\times {{10}^{-4}}C/kg\]

B)

\[1.76\times {{10}^{14}}C/kg\]

C)

\[1.76\times {{10}^{11}}C/kg\]

D)

\[1.76\times {{10}^{-16}}C/kg\]

View Answer
39) A radio transmitter operates at a frequency of 880 kHz and power of 10 kW. The number of photons emitted per second is

A)

\[13.27\times {{10}^{4}}\]

B)

\[13.27\times {{10}^{34}}\]

C)

\[1327\times {{10}^{34}}\]

D)

\[1.71\times {{10}^{31}}\]

View Answer
40) What is the voltage gain in a common emitter amplifier, when input resistance is \[3\,\,\Omega \]. and load resistance is \[24\,\,\Omega \]. with \[\beta =60\]?

A)

480

B)

2.4

C)

4.8

D)

8.4

View Answer
41) The input resistance of a common emitter transistor amplifier, if the output resistance is\[500\,\,k\Omega \], the current gain \[\alpha =0.98\] and the power gain is \[6.0625\times {{10}^{6}}\], is

A)

\[198\,\Omega \]

B)

\[300\,\Omega \]

C)

\[100\,\Omega \]

D)

\[400\,\Omega \]

View Answer
42) Which of the following transitions in hydrogen atom produces longest wavelength of radiation (or photon of minimum energy)?

A)

n = 2, p = 4

B)

n = 3, p = 4

C)

n = 6, p = 8

D)

n = 5, p = 6

View Answer
43) If \[\left( \frac{0.51\times {{10}^{-10}}}{4} \right)\]m, is the radius of smallest electron orbit in hydrogen like atom, then this atom is

A)

H-atom

B)

\[H{{e}^{+}}\]

C)

\[l{{i}^{2+}}\]

D)

\[B{{e}^{3+}}\]

View Answer
44) A series resonant circuit contains \[L=\frac{5}{\pi }\,mH\],\[C=\frac{200}{\pi }\mu F\] and \[R=100\,\,\Omega \]. If a source of emf \[e=200\sin 100\,\,\pi t\] is applied, then the rms current is

A)

2 A

B)

\[200\sqrt{2}\,A\]

C)

\[100\sqrt{2}\,A\]

D)

1.41 A

View Answer
45) A rod of length 1.0 m is rotated in a plane perpendicular to a uniform magnetic field of induction 0.25 T with a frequency of 12 rev/s. The induced emf across the ends of the rod is

A)

18.89V

B)

3V

C)

15V

D)

9.42V

View Answer
46) A ferromagnetic material is heated above its curie temperature. Which one is a correct statement?

A)

Ferromagnetic domains are perfectly arranged

B)

Ferromagnetic domains become random

C)

Ferromagnetic domains are not influenced

D)

Ferromagnetic material changes into diamagnetic material

View Answer
47) A material is placed in a magnetic field and it is thrown out of it. Then the material is

A)

paramagnetic

B)

diamagnetic

C)

ferromagnetic

D)

non-magnetic

View Answer
48) A charged particle of mass m and charge q is accelerated through a potential difference of V volt. It enters a region of uniform magnetic field which is directed perpendicular to the direction of mouon of the panicle. The particle will move on a circular path of radius given by

A)

\[\sqrt{\frac{Vm}{q{{B}^{2}}}}\]

B)

\[\frac{Vm}{q{{B}^{2}}}\]

C)

\[\sqrt{\frac{2Vm}{q}}\,\,.\,\left( \frac{1}{B} \right)\]

D)

\[\sqrt{\frac{Vm}{q}}\,\,.\,\left( \frac{1}{B} \right)\]

View Answer
49) An electron moves at right angle to a magnetic field of \[1.5\times {{10}^{-2}}T\] with a speed of \[6\times {{10}^{-7}}\]m/s. If the specific charge on the electron is \[1.7\times {{10}^{11}}\] C/kg, the radius of the circular path will be

A)

2.9 cm

B)

3.9 cm

C)

2.35cm

D)

2cm

View Answer
50) In a circuit, 5 percent of total current passes through a galvanometer. If resistance of the galvanometer is G. Then the value of the shunt is

A)

19 G

B)

20 G

C)

\[\frac{G}{20}\]

D)

\[\frac{G}{19}\]

View Answer
51) Given, C (diamond) \[+{{O}_{2}}\xrightarrow{{}}C{{O}_{2}};\Delta H=-395\,kJ\] C (graphite) \[+{{O}_{2}}\xrightarrow{{}}C{{O}_{2}};\Delta H=-393\,kJ\] The heat of formation of diamond from graphite is

A)

+2.0 kJ

B)

- 1.5 kJ

C)

-788 kJ

D)

788 kJ

View Answer
52) The type of isomerism observed in benzaldoxime is

A)

optical

B)

functional

C)

geometrial

D)

tautomerism

View Answer
53) Sodium metal is prepared commercially by electrolysis of fused \[NaCl\] by

A)

Downs process

B)

Nelson cell

C)

Solvay process

D)

Castner and Kellners cell

View Answer
54) The value of \[x\] is maximum for

A)

\[MgS{{O}_{4}}\,.\,\,x\,{{H}_{2}}O\]

B)

\[CaS{{O}_{4}}\,.\,\,x\,{{H}_{2}}O\]

C)

\[BaS{{O}_{4}}\,.\,\,x\,{{H}_{2}}O\]

D)

All have the same value of \[x\]

View Answer
55) Heating of ore-in absence of air below its melting point is called

A)

leaching

B)

roasting

C)

smelting

D)

calcination

View Answer
56) In fluorine group of Periodic Table, on going down

A)

ionic radius increases

B)

electronegativity increases

C)

ionisation potential increases

D)

reactivity increases

View Answer
57) The ether that undergoes electrophilic substitution reactions is

A)

\[C{{H}_{3}}O{{C}_{2}}{{H}_{5}}\]

B)

\[{{C}_{6}}{{H}_{5}}OC{{H}_{3}}\]

C)

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

D)

\[{{C}_{2}}{{H}_{5}}O{{C}_{2}}{{H}_{5}}\]

View Answer
58) The order of reactivity of alcohols towards sodium metal is

A)

Primary > Secondary > Tertiary

B)

Primary < Secondary < Tertiary

C)

Primary < Secondary > Tertiary

D)

Primary > Secondary < Tertiary

View Answer
59) If one mole of a substance is present in 1 kg of solvent then its concentration is called

A)

molar cone

B)

molal cone

C)

normality

D)

Strength wt/wt.

View Answer
60) If the pressure and absolute temperature of 2L of carbondioxide gas are doubled, the value of the gas would become

A)

2L

B)

4L

C)

5 L

D)

7L

View Answer
61) \[C{{H}_{3}}CO{{O}^{-}}\] ion is a

A)

weak conjugate base

B)

strong conjugate base

C)

weak conjugate acid

D)

strong conjugate acid

View Answer
62) The hybrid state of C in charcoal is

A)

\[s{{p}^{3}}\]

B)

\[s{{p}^{2}}\]

C)

sp

D)

No specific state

View Answer
63) The shape of \[Cl{{F}_{3}}\] molecule is

A)

triangular planar

B)

pyramidal

C)

T-shape

D)

trigonal bipyramidal

View Answer
64) Equivalent weight of crystalline oxalic acid is

A)

90

B)

63

C)

53

D)

45

View Answer
65) If \[x\,mol\,\,{{L}^{-1}}\] is the solubility of \[KAl{{(S{{O}_{4}})}_{2}}\] then \[{{K}_{sp}}\] is equal to

A)

\[{{x}^{3}}\]

B)

\[4{{x}^{4}}\]

C)

\[{{x}^{4}}\]

D)

\[4{{x}^{3}}\]

View Answer
66) In the reaction, \[{{N}_{2}}(g)+{{O}_{2}}(g)2NO(g)-180.7\,kJ\] on increasing the temperature, the production of NO

A)

increases

B)

decreases

C)

remains same

D)

Cannot be predicted

View Answer
67) In an experiment, 20 mL of decinormal \[HCl\]solution was added to 10 mL of a decinormal \[AgN{{O}_{3}}\] solution. \[AgCl\] was precipitated out and the excess acid was titrated against a, decinormal \[NaOH\] solution. Volume of \[NaOH\]required for this back titration is

A)

10 mL

B)

5 mL

C)

20 mL

D)

30 mL

View Answer

68) Consider the following statements.

I. The colour of the hydrophobic sol depends on the wavelength of the light scattered by the dispersed particle.

II. The smaller the gold number value of a hydrophilic colloid, the greater is its protective power.

III. The movement of sol particle under an applied electric potential is called electroosmosis.

Which of the above statements are correct?

I and II

I and III

II and III

I, II and III

View Answer

69) Natural gas is

A)

\[CO+{{H}_{2}}\]

B)

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

C)

\[C{{H}_{4}}+{{O}_{2}}+{{N}_{2}}\]

D)

None of these

View Answer
70) Colemanite is

A)

\[N{{a}_{2}}{{B}_{4}}{{O}_{7}}\,.\,10{{H}_{2}}O\]

B)

\[C{{a}_{2}}{{B}_{6}}{{O}_{11}}\,.\,5{{H}_{2}}O\]

C)

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

D)

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

View Answer
71) Arsenic drugs are mainly used in the treatment of

A)

jaundice

B)

typhoid

C)

syphilis

D)

cholera

View Answer
72) Which of the following statements is not correct?

A)

Methylamine is more basic than \[N{{H}_{3}}\]

B)

Amines form hydrogen bonds

C)

Ethylamine has higher boiling point than propane

D)

Dimethylamine is less basic than methylamine

View Answer
73) Which one of the following will be most basic?

A)

Aniline

B)

p-methoxyaniline

C)

p-nitroaniline

D)

Benzylamine

View Answer
74) The final product of oxidation of 2-propanol with hot cone. \[HN{{O}_{3}}\] is

A)

propanal

B)

ethanoic acid

C)

propanone

D)

ethanol

View Answer
75) Bimolecular reduction of acetone gives

A)

diacetoneamine

B)

pinacol

C)

chloretone

D)

propane

View Answer
76) Aldehydes and ketones give addition reaction with

A)

hydrazine

B)

phenyl hydrazine

C)

semicarbazide

D)

hydrogen cyanide

View Answer
77) Amongst the following, the compound which is most difficult to sulphonate is

A)

benzene

B)

nitrobenzene

C)

toluene

D)

chlorobenzene

View Answer
78) Acetonitrile is prepared by treating an alcoholic solution of methyl iodide with

A)

silver cyanide

B)

potassium cyanide

C)

hydrogen cyanide

D)

ammonia

View Answer
79) During polymerisation of acetylene to benzene, the state of hybridisation of-carbon changes from

A)

\[s{{p}^{2}}\]to sp

B)

\[s{{p}^{3}}\] to sp

C)

sp to \[s{{p}^{3}}\]

D)

sp to \[s{{p}^{2}}\]

View Answer
80) Which one of the following series contains electrophiles only?

A)

\[{{H}_{2}}O,\,S{{O}_{3}},{{H}_{3}}{{O}^{+}}\]

B)

\[N{{H}_{3}},{{H}_{2}}O,\,AlC{{l}_{3}}\]

C)

\[AlC{{l}_{3}},S{{O}_{3}},\overset{+}{\mathop{N}}\,{{O}_{2}}\]

D)

\[{{H}_{2}}O,\overset{+}{\mathop{C}}\,l,\,N{{H}_{3}}\]

View Answer
81) The equilibrium constants for the reactions \[{{N}_{2}}+3{{H}_{2}}2N{{H}_{3}}\] and \[\frac{1}{2}{{N}_{3}}+\frac{3}{2}{{H}_{2}}N{{H}_{3}}\] are \[{{K}_{1}}\] and \[{{K}_{2}}\] respectively. Which one of the following is the correct relationship?

A)

\[{{K}_{1}}=2{{K}_{2}}\]

B)

\[{{K}_{1}}=\frac{1}{2}{{K}_{2}}\]

C)

\[{{K}_{2}}=\sqrt{{{K}_{1}}}\]

D)

\[{{K}_{1}}={{K}_{2}}\]

View Answer
82) When we increase the temperature, the rate of reaction increases because of

A)

more number of collisions

B)

decrease in mean free path

C)

more number of energetic electrons

D)

less number of energetic electrons

View Answer
83) The pH of buffer of \[N{{H}_{4}}Cl\] type is given by

A)

\[pH=p{{K}_{b}}\]

B)

\[pH=1/2p{{K}_{b}}-1/2\log \] [salt] /[base]

C)

\[pH=14-p{{K}_{b}}-\log \] [salt]/[base]

D)

\[pH=pOH-p{{K}_{b}}+\log \] [salt]/ [base]

View Answer
84) Azimuthal quantum number determines the

A)

size

B)

spin

C)

orientation

D)

angular momentum of orbitals

View Answer
85) The formation of colloid from suspension is called

A)

peptisation

B)

condensation

C)

sedimentation

D)

fragmentation

View Answer
86) Other things being equal, the EMF of a Daniell cell may be increased by

A)

keeping low temperature

B)

using large copper electrodes

C)

using large zinc electrodes

D)

decreasing concentration of \[C{{u}^{2+}}\] ions

View Answer
87) Which one of the following can be considered as a weak electrolyte?

A)

\[NaCl\]

B)

\[HCl\]

C)

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

D)

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

View Answer
88) lodoform can be prepared from all except

A)

acetaldehyde

B)

3-methyl-2-butanone

C)

iso-butyl alcohol

D)

acetophenone

View Answer
89) The end product C in the following sequence of chemical reactions is \[C{{H}_{3}}COOH\xrightarrow{CaC{{O}_{3}}}A\xrightarrow{Heat}\xrightarrow{N{{H}_{2}}OH}C\]

A)

acetaldehyde oxime

B)

formaldehyde oxime

C)

methyl nitrate

D)

acetoxime

View Answer
90) Synthetic human hair wigs are made from a copolymer of vinyl chloride and acrylonitrile and is called

A)

PVC

B)

polyacrylonitrile

C)

cellulose

D)

dynel

View Answer
91) Which one of the following is not an example of chain growth polymer?

A)

Neoprene

B)

Buna-S

C)

PMMA

D)

Glyptal

View Answer
92) Most abundant water pollutant is

A)

detergents

B)

industrial wastes

C)

pesticides

D)

oil spills

View Answer
93) Paulings electronegativity values for elements are useful in predicting

A)

polarity of the molecules

B)

position in the EMF series

C)

coordination numbers

D)

dipole moments

View Answer
94) A neutral ferilizer among the following is

A)

CAN

B)

ammonium sulphate

C)

ammonium nitrate

D)

urea

View Answer
95) Transition metal with low oxidation number will act as

A)

an oxidising agent

B)

abase

C)

an acid

D)

None of these

View Answer
96) In \[LiAl{{H}_{4}}\], the ligand is

A)

H

B)

\[{{H}^{+}}\]

C)

\[{{H}^{-}}\]

D)

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

View Answer
97) Iodide of Millons base is

A)

\[Hg{{I}_{2}}\]

B)

\[{{K}_{2}}Hg{{I}_{4}}\]

C)

\[N{{H}_{2}}HgO\,.\,\,HgI\]

D)

\[N{{H}_{4}}I\]

View Answer
98) Ce-58 is a member of

A)

s-block elements

B)

p-block elements

C)

d-block elements

D)

f-block elements

View Answer
99) Complete hydrolysis of \[Xe{{F}_{2}}\] gives

A)

Xe

B)

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

C)

HF

D)

AH of these

View Answer
100) The alloy best suited for making metre scales is

A)

stainless steel

B)

invar

C)

alnico

D)

tungsten steel

View Answer
101) The capsid of virus is synthesized on

A)

nucleus of the virus

B)

ribosomes of the host

C)

mitochondria of the host

D)

plasma membrane of the host

View Answer
102) Which of the following is not a prorist?

A)

Amoeba

B)

Taenia

C)

Paramecium

D)

Euglena

View Answer
103) Archegonia are not found in

A)

bryophytes

B)

pteridophytes

C)

gymnosperms

D)

angiosperms

View Answer
104) Mycoplasma can multiply

A)

in culture media

B)

in the body of living host

C)

on dead and decaying matther

D)

All of the above

View Answer
105) An intracellular parasite is

A)

Entamoeba

B)

Ascaris

C)

Trypanosoma

D)

Plasmodium

View Answer
106) Mycorrhizal association is must for growth of

A)

mushrooms

B)

orchids

C)

sal and teak

D)

None of these

View Answer
107) Antherozoids of pteridophyta are

A)

much coiled and multiciliated

B)

pear-shaped and biflagellate

C)

cork screw-shaped and multiflagellated

D)

All of the above

View Answer
108) Pectin substance is generally stained with

A)

iodine

B)

light green

C)

cotton blue

D)

ruthenium red

View Answer
109) Blood cell which shows phagocytosis is

A)

eosinophyll

B)

basophyll

C)

monocyte

D)

platelet

View Answer
110) Amitosis is a division

A)

involving spindle formation

B)

involving formation of chromosome bridges

C)

in which chromosome number becomes half

D)

in which cell divide

View Answer
111) All of the followings are composed exclusively of glucose, except

A)

amylose

B)

cellulose

C)

lactose

D)

maltose

View Answer
112) The percentage of heterozygous individuals obtained from selfing Rr individual, is

A)

25

B)

75

C)

50

D)

100

View Answer
113) Balbiani rings are the centre for

A)

DNA synthesis

B)

RNA synthesis

C)

Both [a] and [b] synthesis

D)

None of the above

View Answer
114) You are studying a bacterial virus and found its base composition to be A = 22%, T = 28%, G = 20% and C = 30%. What is your conclusion regarding its genetic material?

A)

Single-stranded RNA

B)

Double-stranded RNA

C)

Single-stranded DNA

D)

Double-stranded DNA

View Answer
115) Which one is the Pribnow box?

A)

5 TATAAT 3

B)

5 TAATTA 3

C)

5 AATAAT 3

D)

5 ATATTA 3

View Answer
116) A woman with Straight hair marries a man with curly hair who is known to be heterozygous for the trait. What is the chance that their first child will have curly hair?

A)

No chance

B)

One in two

C)

It is certain

D)

One in four

View Answer
117) Life originated in

A)

air

B)

water

C)

land

D)

all of these

View Answer
118) Which of these is mismatched?

A)

Coenozoic-Grasses and humans

B)

Mesozoic -Cycads and dinosaurs

C)

Palaeozoic-Prokaryotes and unicellular eukaryotes

D)

Cambrian-Marine organism with external skeletons

View Answer
119) 200 seeds are produced from how many fruits of maize?

A)

200

B)

100

C)

50

D)

5

View Answer
120) Outer part of bark consisting of dead cells refers to

A)

rhytidome

B)

phellem

C)

phellogen

D)

phelloderm

View Answer
121) A person supplied excess fertilizers and watered the plants well. After sometime, the leaves turn brown because

A)

exosmosis occurs in root and the plant dies

B)

fertilizer is drained in lower layer of soil

C)

it decreases photosynthesis

D)

due to water logging soil

View Answer
122) Which of the fallowing elements are used up in phosphorylaften?

A)

N and P

B)

I and P

C)

Ca and Mg

D)

Ca and S

View Answer
123) Agranal chloroplasts occur in certain

A)

succulents

B)

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

C)

hydrophytes

D)

\[{{C}_{3}}\]plants

View Answer
124) How many ATP and \[NAD{{H}_{2}}\] are produced in photorespiration?

A)

2 and 4

B)

1 and 2

C)

4 and 6

D)

zero

View Answer
125) Embryonic connective tissue is derived from

A)

ectoderm

B)

mesoderm

C)

endoderm

D)

All of these

View Answer
126) Troponin is a

A)

muscle protein

B)

digestive enzyme

C)

water soluble vitamin

D)

high energy reservoir

View Answer
127) A renal portal system is found in

A)

man

B)

frog

C)

horse

D)

rabbit

View Answer
128) Amylopsin acts upon

A)

polypeptides

B)

polysaccharide in any medium

C)

polysaccharide in acidic medium

D)

polysaccharide in alkaline medium

View Answer
129) During forced expiration, actively contracting muscles include the

A)

diaphragm

B)

external intercostals

C)

abdominal muscles

D)

All of the above

View Answer
130) Which term does not apply to human heart?

A)

Pace-maker

B)

Mitral valve

C)

Neurogenic

D)

Four-chambered

View Answer
131) Synthesis of urea in liver takes place by

A)

nitrogen cycle

B)

Krebs cycle

C)

ornithine cycle

D)

glycolysis

View Answer
132) A disease associated with pain and swelling is

A)

arthritis

B)

Pagets disease

C)

glaucoma

D)

Homers syndrome

View Answer
133) Acetylcholine is

A)

neural messenger

B)

antistress hormone

C)

chemical messenger

D)

chemical transmitter

View Answer
134) Which of the following hormones is a modified amino acid?

A)

MSH

B)

Oestrogen

C)

Epinephrine

D)

Prostaglandin

View Answer
135) Cybrids carry

A)

two similar genomes

B)

only one genome

C)

several genomes

D)

one genome and two plasmones

View Answer
136) Maximum amount of growth in root occurs

A)

in the absence of light

B)

at its apex

C)

behind the apex

D)

in the presence of soil

View Answer
137) Which statement about oocytes is true?

A)

At the onset of menopause, the woman stops producing them

B)

They are produced by the human female throughout adiosecence

C)

Those produced by the females are stored in the seminiferous tubules

D)

At birth, the human female has produced all the oocytes she will ever produce

View Answer
138) In which type of egg, total cleavage is possible?

A)

Telolecithal

B)

Oligolecithal

C)

Centrolecithal

D)

Macrolecithal

View Answer
139) Programmed cell death is scientifically termed as

A)

cell lysis

B)

apoptosis

C)

autotomy

D)

None of these

View Answer
140) Alluvial soil is a type of

A)

residual soil

B)

transport soil

C)

well mature soil

D)

None of these

View Answer
141) The extreme top of Mount Everest is in the region of

A)

stratosphere

B)

stratopause

C)

troposphere

D)

mesosphere

View Answer
142) A virgin ecosystem can be seen in

A)

Eastern Himalaya

B)

Shimla

C)

Nainital

D)

Silent valley of Kerala

View Answer
143) Transitional zone between two vegetational type is referred to

A)

ecotone

B)

ecotype

C)

ecades

D)

ecophenes

View Answer
144) Sewage water turns black due to action of

A)

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

B)

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

C)

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

D)

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

View Answer
145) Which habitat shows highest diversity of living species?

A)

Deserts

B)

Temperate forests

C)

Tropical rainforests

D)

Grasslands

View Answer
146) AZT is the treatment of

A)

TB

B)

AIDS

C)

malaria

D)

kala-azar

View Answer
147) A disease caused by one of the smallest viruses is

A)

trachoma

B)

poliomyelitis

C)

mumps

D)

measles

View Answer
148) Tobacco fcdntains

A)

codeine

B)

nicotine

C)

morphine

D)

cocaine

View Answer
149) Membrane attack complex is formed by

A)

e-lymphocytes

B)

macrophages

C)

t-lymphocytes

D)

complements

View Answer
150) Axenic culture mean?

A)

cell culture

B)

cell culture free from microorganisms

C)

cell culture free from nutrients

D)

None of the above

View Answer

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