# Solved papers for BCECE Medical BCECE Medical Solved Papers-2013

### done BCECE Medical Solved Papers-2013

• question_answer1) The dimensions of universal gravitational constant are

A) $[{{M}^{-2}}{{L}^{-3}}{{T}^{-2}}]$

B) $[{{M}^{-2}}\,{{L}^{2}}\,{{T}^{-1}}]$

C) $[{{M}^{-1}}\,{{L}^{3}}\,{{T}^{-2}}]$

D) $[M{{L}^{2}}\,{{T}^{-1}}]$

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• question_answer2) If $\left| A\times B \right|=\sqrt{3}\,\,A\,.\,B$ then the value of $\left| A+B \right|$ is

A) A + B

B) ${{({{A}^{2}}+{{B}^{2}}+\sqrt{3}\,AB)}^{1/2}}$

C) ${{\left( {{A}^{2}}+{{B}^{2}}+\frac{AB}{\sqrt{3}} \right)}^{1/2}}$

D) ${{({{A}^{2}}+{{B}^{2}}+AB)}^{1/2}}$

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• question_answer3) Two spheres of masses m and M are situated in air and the gravitional force between them is F. The space around the masses is now filled with a liquid of specific gravity 3. The new gravitational force will be

A) F

B) $\frac{F}{3}$

C) 3F

D) $\frac{F}{9}$

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• question_answer4) A body floats in water with one fourth of its volume above the surface of water. If placed in oil it floats with one third of its volume above the surface of oil. The density of oil is

A) $\frac{3}{4}$

B) $\frac{4}{9}$

C) $\frac{2}{3}$

D) $\frac{9}{8}$

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• question_answer5) When capillary tubes of different radii r dipped in water, water rises to different heights h in them, then

A) ${{h}^{2}}=$ constant

B) hr = constant

C) $\frac{h}{r}=$ constant

D) $\frac{h}{{{r}^{2}}}=$ constant

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• question_answer6) In the adjoining figure A, B, and C represents three progressive waves. Which of the following statement about the waves is correct? A) Wave C lags behind in phase by $\frac{\pi }{2}$ from A and. B leads by $\frac{\pi }{2}$

B) Wave C leads in phase by $\pi$ from A and B lags behind by $\pi$

C) Wave C leads in phase by $\frac{\pi }{2}$ from A and lags behind by $\frac{\pi }{2}$

D) Wave C lags behind in phase by $\pi$ from A and B leads by $\pi$

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• question_answer7) If 110 J of heat are added to a gaseous system, whose internal energy is 40 J, then the amount of external work done is

A) 40 J

B) 70 J

C) 110 J

D) 150 J

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• question_answer8) A ray is incident at an angle of incidence i on one surface of a prism of small angle A and emerges normally from the opposite surface. If the refractive index of the material of the prism is $\mu$, the angle of incidence $i$ is nearly equals to

A) $\mu \,A/2$

B) $A/2\,\mu$

C) $\mu \,A$

D) $A/\mu$

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• question_answer9) Figure below shows four plates each of area S separated from one another by a distance d. What is the capacitance between A and B? A) $\frac{4{{\varepsilon }_{0}}3}{d}$

B) $\frac{3{{\varepsilon }_{0}}5}{d}$

C) $\frac{2{{\varepsilon }_{0}}5}{d}$

D) $\frac{{{\varepsilon }_{0}}5}{d}$

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• question_answer10) What is the value of current in the arm containing $2\pi$ resistor in the adjoining circuit? A) 0.7 amp

B) 1.2 amp

C) 1.5 amp

D) 1.0 amp

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• question_answer11) For ohmic conductor the drift velocity ${{\upsilon }_{d}}$ and the electric field applied across it are related as

A) ${{v}_{d}}\propto \sqrt{E}$

B) ${{v}_{d}}\propto {{E}^{2}}$

C) ${{v}_{d}}\propto E$

D) ${{v}_{d}}\propto \frac{1}{E}$

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• question_answer12) If E and B be the electric and magnetic field vectors of electromagnetic waves, the direction of propagation of electromagnetic waves is that of

A) E

B) B

C) E $\times$ B

D) B $\times$ E

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• question_answer13) The current in RCL circuit is maximum where

A) ${{X}_{L}}=0$

B) ${{X}_{L}}={{X}_{C}}$

C) ${{X}_{C}}=0$

D) $X_{L}^{2}+X_{C}^{2}=1$

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• question_answer14) What is the value of $\overline{A}$ + A in the boolean algebra?

A) 0

B) 1

C) A

D) A

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• question_answer15) The truth table given below is for which gate?

 A B Y 0 0 1 0 1 1 1 0 1 1 1 0

A) XOR

B) OR

C) AND

D) NAND

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• question_answer16) The magnetic flux through a circuit of resistance R changes by an amount $\Delta \phi$ in a time $\Delta t$. Then the total quantity of electric charge Q that passes any point in the circuit during the time $\Delta t$ is represented by

A) $Q=\frac{\Delta \phi }{\Delta t}$

B) $Q=\frac{\Delta \phi }{R}$

C) $Q=R.\frac{\Delta \phi }{\Delta t}$

D) $Q=\frac{1}{R}\frac{\Delta \phi }{\Delta t}$

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• question_answer17) A particle moves along a circle of radius $\left( \frac{20}{\pi } \right)$m with constant tangential acceleration. If the velocity of the particle is 80 m/s at the end of the second revolution after motion has begun the tangential acceleration will be

A) $40\,\pi \,m/{{s}^{2}}$

B) $40\,m/{{s}^{2}}$

C) $160\,\pi \,m/{{s}^{2}}$

D) $640\,\pi \,m/{{s}^{2}}$

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• question_answer18) The output of a OR gate is 1

A) if either input is zero

B) if both inputs are zero

C) only if both inputs are 1

D) if either or both inputs are 1

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• question_answer19) Two 220 V, 100 W bulbs are connected first in series and then in parallel. Each time the combination is connected to a 220V AC supply line, the power drawn by the combination in each case respectively will be

A) 50 W, 200 W

B) 50 W, 20 W

C) 100 W, 50 W

D) 200 W, 150 W

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• question_answer20) Barrier potential of a p-n junction diode does not depend on

A) diode design

B) doping density

C) temperature

D) farward bias

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• question_answer21) A projectile is projected with a linear momentum p making an angle 9 with the horizontal. The change in momentum of the projectile on return to the ground will be

A) $2\,p\tan \theta$

B) $2\,p\sin \theta$

C) $2\,p\cos \theta$

D) 2p

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• question_answer22) A weigthtless thread can bear tension up to 3.7 kg wt. A stone of mass 500 g is tied to it and revolved in a circular path of radius 4m in a vertical plane. If $g=10\,m/{{s}^{2}}$, then the maximum angular velocity of the stone will be

A) 2 rad/s

B) 4 rad/s

C) 16rad/s

D) $\sqrt{21}$ rad/s

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• question_answer23) Under a constant torque, the angular momentum of a body changes from A to 4 A in 4 s. The torque is

A) 3 A

B) $\frac{1}{4}A$

C) $\frac{3}{4}A$

D) $\frac{4}{3}A$

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• question_answer24) The mass of a planet is double and its radius is half compared to that of earth. Assuming $g=10\,m/{{s}^{2}}$ on earth, the acceleration due to gravity at the planet will be

A) 10 $m/{{s}^{2}}$

B) 20 $m/{{s}^{2}}$

C) 40 $m/{{s}^{2}}$

D) None of these

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• question_answer25) A soap bubble in vacuum, has a radius of 3 cm and another soap bubble in vacuum has a radius of 4 cm. If the two bubbles coalesce under isothermal condition, then the radius of new bubble is

A) 4.3cm

B) 4.5cm

C) 5cm

D) 7cm

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• question_answer26) Deuteron and a-particle are put $1\overset{\text{o}}{\mathop{\text{A}}}\,$ apart in air. Magnitude of intensity of electric field due to deuteron of a-particle is

A) zero

B) $2.88\times {{10}^{11}}N/C$

C) $1.44\times {{10}^{11}}N/C$

D) $5.76\times {{10}^{11}}N/C$

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• question_answer27) The air column in pipe, which is closed at one end will be in resonance with a vibrating turning fork at a frequency of 260 Hz, if the length of the air column is

A) 31.73cm

B) 62.5cm

C) 35.75cm

D) 12.5cm

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• question_answer28) A ball strikes against the floor and returns with double the velocity. In which type of collision is it possible?

A) Inelastic

B) Perfectly inelastic

C) Perfectly elastic

D) Not possible

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• question_answer29) A body is under the action of three force ${{F}_{1}},{{F}_{2}}$, and ${{F}_{3}}$. In which case the body cannot under go angular acceleration?

A) ${{F}_{1}}+{{F}_{2}}+{{F}_{3}}=0$

B) ${{F}_{1}},{{F}_{2}}$ and ${{F}_{3}}$ are concurrent

C) ${{F}_{1}}$, and ${{F}_{2}}$ act at the same point but, ${{F}_{3}}$acts at different point

D) ${{F}_{1}}+{{F}_{2}}$ is parallel to ${{F}_{3}}$, but the three forces are not concurrent

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• question_answer30) Two beams of protons moving parallel in same direction will

A) repel each other

B) exert no force

C) attract each other

D) deflect perpendicular to the plane of the beams

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• question_answer31) A photon and an electron possess same de-Broglie wavelength given that C = speed of light and $\upsilon =$ space of electron, which of the following relation is correct? (here, ${{E}_{e}}=K.\,E$ of electron, ${{E}_{Ph}}=K.\,E$ of photon, ${{P}_{e}}=$ momentum of electron, ${{P}_{ph}}=$momentum of photon)

A) $\frac{{{P}_{e}}}{{{P}_{Pn}}}=\frac{C}{2v}$

B) $\frac{{{E}_{e}}}{{{E}_{Pn}}}=\frac{C}{2v}$

C) $\frac{{{E}_{ph}}}{{{E}_{e}}}=\frac{2C}{v}$

D) $\frac{{{P}_{e}}}{{{P}_{ph}}}=\frac{2C}{v}$

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• question_answer32) To get an output Y == 1 from circuit of adjoining figure, the input must be A) A - 0 B - 1 C - 0

B) A - 1 B - 0 C - 0

C) A - 1 B - 0 C - 1

D) A - 1 B - 1 C - 0

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• question_answer33) Hubbles law is expressed as (here, $\upsilon =$ speed of recession, r = distance of galaxy, H = bubble constant)

A) v = Hr

B) $v={{H}^{2}}r$

C) (c )$v=\frac{H}{{{r}^{2}}}$

D) $v=H{{r}^{2}}$

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• question_answer34) The displacement versus time graph for a body moving in a straight line is shown in figure. Which of the following regions represents motor when no force is acting on the body? A) ab

B) be

C) cd

D) be

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• question_answer35) Which of the following graphs shows the variation of magnetic field B, with distance from a long current carrying conductor?

A) B) C) D) View Answer play_arrow
• question_answer36) The time period of a freely suspended magnet does not depend upon

A) length of the magnet

B) the pole strength of the magnet

C) the horizontal component of magnetic field of earth

D) the length of the suspension

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• question_answer37) The magnetic permeability is defined as the ratio of

A) magnetic induction and magnetising field

B) intensity of magnetisation and magnetising field

C) intensity of magnetisation and magnetic field

D) None of the above

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• question_answer38) Figure represents an area $A=0.5\,\,{{m}^{2}}$ situated in a uniform magnetic field $B=2.0\,\,Wb/{{m}^{2}}$ and making an angle of ${{60}^{o}}$ with respect to magnetic field. The value of magnetic flux through the area will be A) 0.5 Wb

B) $\sqrt{3}$ Wb

C) $\frac{3}{2}$ Wb

D) 2.0 Wb

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• question_answer39) Of the given diodes, shown in the adjoining diagrams, which one is reverse biased?

A) B) C) D) View Answer play_arrow
• question_answer40) Three particles each of mass m gram, are situated at the vertices of an equilateral triangle ABC of the side 1 cm. The moment of inertia of the system (as shown in figure) about a line AX perpendicular to AB and in the plane of ABC in gram- $c{{m}^{2}}$ units will be A) $\frac{3}{2}m{{l}^{2}}$

B) $\frac{3}{4}m{{l}^{2}}$

C) $2\,m{{l}^{2}}$

D) $\frac{5}{4}\,m{{l}^{2}}$

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• question_answer41) A galvanometer of $50\pi$ resistance has 25 divisions. A current of $4\times {{10}^{-4}}A$ gives a deflection of one division. To convert this galvanometer into a voltmeter having a range of 25 volt, it should be connected with a resistance of

A) 245$\pi$ as shunt

B) 2450$\pi$ as series

C) 2500$\pi$ as shunt.

D) 2550$\pi$ in series

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• question_answer42) A car is moving towards a high cliff. The car driver sounds a horn of frequency $f$. The reflected sound heard by the driver has the frequency $2f$. If be the velocity of sound, then the velocity of the car, in the same velocity units will be

A) $\frac{v}{\sqrt{2}}$

B) $\frac{v}{2}$

C) $\frac{v}{3}$

D) $\frac{v}{4}$

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• question_answer43) A plane glass slab is kept over various coloured letters, the letter which appears least raised is

A) violet

B) blue

C) green

D) red

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• question_answer44) If the angle of incidence is $i$ and that of refraction is r. Then the speed of light in the medium to which the light is refracted from air is

A) $v=C\frac{\sin i}{\cos r}$

B) $v=C\frac{\cos r}{\cos i}$

C) $v=C\frac{\sin r}{\sin i}$

D) $v=C\frac{\sin i}{\sin r}$

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• question_answer45) An electron moves with a velocity v in an electric field E. If the angle between v and E is neither 0 nor $\pi$, the path followed by the electron is

A) parabola

B) circle

C) straight-line

D) ellipse

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• question_answer46) The internal resistance of a cell of emf 2 V is 0. 1$\pi$. If it is connected to a resistance of 3.9 $\pi$, then the voltage across the cell will be (in volts)

A) 2V

B) 0.5V

C) 1.95V

D) 2.5V

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• question_answer47) An electric kettle takes 4 A current a 1220V. How much time will it take to boil 1 kg of water from room temperature ${{20}^{o}}C$? (the temperature of boiling water is ${{100}^{o}}C$)

A) 12.6 min

B) 12.8 min

C) 6.3 min

D) 6.4 min

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• question_answer48) The phenomenon of pair production is

A) ejection of an electron from a nucleus

B) ejection of an electron from a metal surface

C) ionisation of a neutral atom

D) the production of an electron and a positron from $\gamma$-rays.

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• question_answer49) In an electron microscope if the potential is increased from 20 kV to 80 kV, the resolving power R of the microscope will become

A) 0

B) W

C) 4R

D) 5R

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• question_answer50) Force acting upon a charged particle kept between the plates of changed capacitor is F. If one of the plates of the capacitor is removed force acting on the same particle will become

A) 0

B) F

C) $\frac{F}{2}$

D) 2F

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• question_answer51) $C{{H}_{3}}-\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,}}\,-\overset{\begin{smallmatrix} OH \\ | \end{smallmatrix}}{\mathop{C}}\,HC{{H}_{3}}\xrightarrow{HBr}$ A(Predominant) Identify A.

A) ${{(C{{H}_{3}})}_{2}}C\,(Br)\,CH\,{{(C{{H}_{3}})}_{2}}$

B) ${{(C{{H}_{3}})}_{3}}CCH\,(Br)\,C{{H}_{3}}$

C) ${{(C{{H}_{3}})}_{3}}COHBr\,C{{H}_{3}}$

D) None of the above

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• question_answer52) A P-hydroxy carbonyl compound is obtained by the action of $NaOH$ on

A) ${{C}_{6}}{{H}_{5}}CHO$

B) $HCHO$

C) $C{{H}_{3}}CHO$

D) ${{(C{{H}_{3}})}_{3}}C.\,\,CHO$

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• question_answer53) Which of the following statements is correct?

A) + / effect stabilises a carbanion

B) + / effect stabilises a carbocation

C) -/ effect stabilises a carbanion

D) - / effect stabilises a carbocation

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• question_answer54) ${{C}_{4}}{{H}_{6}}{{O}_{4}}A\xrightarrow{\Delta }{{C}_{3}}{{H}_{6}}{{O}_{2}}B\xrightarrow[\Delta ]{sodalime}C$ Compound C is a hydrocarbon, occupying approx 0.75 L volume per gram. Identify A and B.

A) Tartaric acid, propanoic acid

B) Succinic acid, succinic anhydride

C) Maleic anhydride, maleic acid

D) Methyl malonic acid, propanoic acid

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• question_answer55) What is effective nuclear charge and the periphery of nitrogen atom when an extra electron is added in the formation of an anion?

A) 1.20-

B) 2.45

C) 3.55

D) 5.95

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• question_answer56) A certain metal sulphide, $M{{S}_{2}}$, is used extensively as a high temperature lubricant. If $M{{S}_{2}}$ has 40.06 % sulphur by weight, atomic mass of M will be

A) 100 amu

B) 96 amu

C) 60 amu

D) 30 amu

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• question_answer57) In HNC, which element has least value of formal charge?

A) H

B) N

C) C

D) All have same value

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• question_answer58) Consider following unit values of energy

 I. 1 L atm, II. 1 erg, III. 1 J IV. kcal,
Increasing order of these values is

A) I = II = III = IV

B) l < II < III < IV

C) ll < lll < I < IV

D) IV < l < III < II

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• question_answer59) The number of elements in the transition metal series Sc through Zn that have four unpaired electrons in their + 2 state are

A) 2

B) 4

C) 5

D) 6

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• question_answer60) In an atmosphere with industrial smog, copper corrodes to

 I. $C{{u}_{2}}{{(OH)}_{2}}S{{O}_{4}}$ II. $C{{u}_{2}}{{(OH)}_{2}}C{{O}_{3}}$ III. $CuS{{O}_{4}}$ IV. $CuC{{O}_{3}}$

A) I and III

B) II and IV

C) I and IV

D) I and II

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• question_answer61) Mischmetal is

A) an alloy of lanthanide and nickel

B) an alloy of lanthanide and copper

C) an alloy of lanthanide, iron and carbon

D) an alloy of lanthanide, magnesium and nickel

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• question_answer62) What is the oxidation state of iron in ${{[Fe{{({{H}_{2}}O)}_{5}}NO]}^{2+}}$?

A) 0

B) +1

C) +2

D) +3

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• question_answer63) Identify the final product of the reaction $BC{{l}_{3}}+N{{H}_{4}}Cl\xrightarrow[{{C}_{6}}{{H}_{5}}Cl]{{{140}^{o}}C}\xrightarrow{NaB{{H}_{4}}}?$

A) ${{B}_{3}}{{N}_{3}}{{H}_{6}}$

B) ${{B}_{2}}{{H}_{6}}$

C) $NaBC{{l}_{4}}$

D) BN

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• question_answer64) 2.56 g of sulphur in 100 g of $C{{S}_{2}}$ has depression in freezing point of ${{0.010}^{o}}C$. Atomicity of sulphur in $C{{S}_{2}}$ is (Given, ${{K}_{f}}={{0.1}^{o}}\,mola{{l}^{-1}}$)

A) 2

B) 4

C) 6

D) 8

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• question_answer65) For the zeroth order reaction, sets I and II are given, hence $x$is

 I. II. A) 2 min

B) 4 min

C) 6 min

D) 8 min

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• question_answer66) Equilibrium constant for the reaction, $N{{H}_{4}}OH+{{H}^{+}}NH_{4}^{+}+{{H}_{2}}O$ is $1.8\times {{10}^{9}}$. Hence, equilibrium constant for$N{{H}_{3}}\,\,(aq)+{{H}_{2}}ONH_{4}^{+}+O{{H}^{-}}$ is

A) $1.8\times {{10}^{-5}}$

B) $1.8\times {{10}^{5}}$

C) $1.8\times {{10}^{-9}}$

D) $5.59\times {{10}^{-10}}$

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• question_answer67) Calculate pH change when 0.01 mol$C{{H}_{3}}KCOO$ Na solution is added to 1 L of$0.01\,\,M\,C{{H}_{3}}COOH$ solution. $Ka\,\,(C{{H}_{3}}COOH)=1.8\times {{10}^{-5}},\,pKa=4.74$

A) 3.37

B) 1.37

C) 4.74

D) 8.01

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• question_answer68) $p{{K}_{b}}$ of $N{{H}_{3}}$ is 4.74 and $p{{K}_{b}}$ of ${{A}^{-}},\,{{B}^{-}}$and ${{C}^{-}}$ are 4, 5 and 6 respectively. Aqueous solution of 0.01 M has pH in the increasing order

A) $N{{H}_{4}}A<N{{H}_{4}}B<N{{H}_{4}}C$

B) $N{{H}_{4}}C<N{{H}_{4}}B<N{{H}_{4}}A$

C) $N{{H}_{4}}C<N{{H}_{4}}A<N{{H}_{4}}B$

D) All have equal pH

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• question_answer69) Osmotic pressure of insulin solution at 298 K is found to be 0.0072 atm. Hence, height of water column due to this pressure is [given d$(Hg)=13.6\,\,g/mL$]

A) 0.76cm

B) 0.70cm

C) 7.4 cm

D) 76 cm

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• question_answer70) $\Delta {{G}^{o}}$ and $\Delta {{H}^{o}}$ for a reaction at 300 K is $-66.9\,kJ\,mo{{l}^{-1}}$ and $-41.8\,kJ\,mo{{l}^{-1}}$respectively. $\Delta {{G}^{o}}$ for the same reaction at 330 K is

A) $-25.1\,\,kJ\,\,mo{{l}^{-1}}$

B) $+25.1\,\,kJ\,\,mo{{l}^{-1}}$

C) $18.7\,\,kJ\,\,mo{{l}^{-1}}$

D) $-69.4\,\,kJ\,\,mo{{l}^{-1}}$

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• question_answer71) At 1000 K, from the data ${{N}_{2}}(g)+3{{H}_{2}}(g)\xrightarrow{{}}2N{{H}_{3}}(g);$ $\Delta H=-123.77\,kJ\,\,mo{{l}^{-1}}$

 Substance ${{N}_{2}}$ ${{H}_{2}}$ $N{{H}_{3}}$ P/R 3.5 3.5 4
Calculate the heat of formation of $N{{H}_{3}}$ at 300 K.

A) $-44.42\,\,kJ\,\,mo{{l}^{-1}}$

B) $-88.85\,\,kJ\,\,mo{{l}^{-1}}$

C) $+44.42\,\,kJ\,\,mo{{l}^{-1}}$

D) $+88.85\,\,kJ\,\,mo{{l}^{-1}}$

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• question_answer72) Match the electrode (in column I) with its general name (in Column II) and choose the correct option given below.

 Column - I Column - II A Calomel I. Reference B Glass II. Redox C Hydrogen III. Membrane D Quinhydrone IV. Gas

A) A-III B-III C- IV D-IV

B) A-IIII B-IV C-II D-II

C) A-III B-II C-IV D- I

D) A- II B-IV C- III D-I

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• question_answer73) In a Daniell cell constructed in the laboratory, the voltage observed was 0.9 V instead of 1.1 V of the standard cell. A possible explanation is

A) $[Z{{n}^{2+}}]>[C{{u}^{2+}}]$

B) $[Z{{n}^{2+}}]<[C{{u}^{2+}}]$

C) Zn electrode has twice the surface of Cu electrode

D) mol ratio of $Z{{n}^{2+}}:\,C{{u}^{2+}}$ is $2:1$

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• question_answer74) A quantity of electrical charge that brings about the deposition of 4.5 g Al from $A{{l}^{3+}}$ at the cathode will also produce the following volume at (STP) of ${{H}_{2}}(g)$) from ${{H}^{+}}$ at the cathode

A) 44.8 L

B) 22.4 L

C) 11.2L

D) 5.6 L

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• question_answer75) IUPAC name of the following compound is A) 3-propyi cyclo [3, 6] octane

B) 1-ethyl tricyclo [2, 3, 0] heptane

C) 1-ethyl bicyclo [2, 2,1] heptane

D) 4-ethyl bicyclo [2, 2, 2] heptane .

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• question_answer76) Identify Yin the following series of equation $\to -H+B{{r}_{2}}\xrightarrow{h\upsilon }X\xrightarrow[{{D}_{2}}O]{Mg/ether}Y$

A) B) C) D) View Answer play_arrow
• question_answer77) Arrange the following in the order of rate of oxidation with periodic acid

 I. $HOC{{H}_{2}}C{{H}_{2}}OH$, II. $C{{H}_{3}}CHOHCHOHC{{H}_{3}}$ III. ${{(C{{H}_{3}})}_{2}}COHCOH\,{{(C{{H}_{3}})}_{2}}$

A) I > II > III

B) ll > I > III

C) III > II > I

D) I > III = II

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• question_answer78) Phenol and $N{{H}_{3}}$ reacts in presence of $ZnC{{l}_{2}}$at ${{300}^{o}}C$ to produce

A) tertiary amine

B) secondary amine

C) primary amine

D) All of these

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• question_answer79) $A\,\,[{{C}_{6}}{{H}_{10}}{{O}_{3}}\,(keto\text{ }ester)]\,\,\xrightarrow[\Delta ]{NaOH+{{I}_{2}}}$ yellow$ppt+B\xrightarrow{{{H}^{+}}}\,C\xrightarrow[-C{{O}_{2}}]{\Delta }C{{H}_{3}}COOH$. Hence, A is

A) $C{{H}_{3}}\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,C{{H}_{2}}\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,O{{C}_{2}}{{H}_{5}}$

B) $C{{H}_{3}}C{{H}_{2}}\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,C{{H}_{2}}\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,OC{{H}_{3}}$

C) Both are correct

D) None is correct

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• question_answer80) $C{{H}_{3}}\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,C{{H}_{3}}$ can be converted into $C{{H}_{3}}\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,OH$by following methods

 I. $C{{H}_{3}}\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,C{{H}_{3}}\,\,\xrightarrow[\Delta ,\,{{H}^{+}}]{{{I}_{2}}/NaOH}$ II. $C{{H}_{3}}\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,C{{H}_{3}}\,\,\xrightarrow{C{{r}_{2}}O_{7}^{2-}/{{H}^{+}}}$ III. $C{{H}_{3}}\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,C{{H}_{3}}\,\,\xrightarrow{Ag(N{{H}_{3}})_{2}^{+}}$
Which method are most effective?

A) I, III

B) II, III

C) I, II

D) I, II, III

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• question_answer81) Relative stabilities of the following carbocation will be in order   $\underset{IV}{\mathop{C{{H}_{3}}\overset{\oplus }{\mathop{C}}\,{{H}_{2}}}}\,$

A) IV < III < II < I

B) IV < II < III < I

C) II < IV< III < I

D) I < II < III < IV

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• question_answer82) The correct statement in respect of protein haemoglobin is that it

A) functions as a catalyst for biological reactions

B) maintains blood sugar level

C) acts as an oxygen carrier in the blood

D) forms antibodies and offers resistance to diseases

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• question_answer83) $C{{H}_{3}}COOH+HCOOH\xrightarrow[570\,\,K]{MnO}$ Main product of above reaction is

A) $C{{H}_{3}}CHO$

B) $C{{H}_{3}}COC{{H}_{3}}$

C) $HCHO$

D) ${{(C{{H}_{3}}CO)}_{2}}O$

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• question_answer84) Aniline is reacted with bromine water and the resulting product is treated with an aqueous solution of sodium nitrite in presence of dilute hydrochloric acid. The compound so formed is converted to a tetrafluoroborate which is subsequently heated. The final product is

A) p-bromoaniline

B) p-bromofluorobenzene

C) 1, 3, 5-tri bromobenzene

D) 2, 4, 6-tribromofluorobenzene

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• question_answer85) With hard water, ordinary soap forms curdy precipitate of

A) ${{(RCOO)}_{2}}Ca$

B) ${{(RCOO)}_{2}}Mg$

C) Both [a] and [b]

D) None of these

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• question_answer86) Which is matched incorrectly? Structure Compound

A) B) C) Both [a] and [b]

D) None of the above

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• question_answer87) Which base is normally found in RNA but not in DNA?

A) Uracil

B) Thymine

C) Guanine

D) Adenine

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• question_answer88) The dipole moment of HBr is $2.60\times {{10}^{-30}}cm$and the interatomic spacing is $1.41\,\overset{o}{\mathop{A}}\,$. What is the per cent ionic character of $HBr$?

A) 50 %

B) 11.5 %

C) 4.01 %

D) 1.19 %

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• question_answer89) An element is oxidised by fluorine and not by chlorine. Identify the element.

A) Sodium

B) Aluminium

C) Oxygen

D) Sulphur

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• question_answer90) The reduction of an oxide by aluminium is called

A) Krolls process

B) van Arkel process

C) Ellingham process

D) Goldschmidts aluminothermite process

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• question_answer91) ${{H}_{2}}$ gas is liberated at cathode and anode both by electrolysis of the following solution except in

A) $NaCl$

B) $NaH$

C) $LiH$

D) $HCOONa$

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• question_answer92) Identify [A] and [B] in the following sequence of reactions. $SnC{{l}_{2}}+2NaOH\xrightarrow{{}}(A)\,$ (white ppt) $\xrightarrow[(excess)]{NaOH}(B)$

A) $Sn{{(OH)}_{2}},\,N{{a}_{2}}Sn{{O}_{3}}$

B) $Sn{{(OH)}_{2}},\,N{{a}_{2}}Sn{{O}_{2}}$

C) $Sn{{(OH)}_{2}},\,N{{a}_{2}}[Sn{{[OH)}_{2}}]$

D) $Sn{{(OH)}_{2}}$, no effect

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• question_answer93) Nature of nitride ion is

A) acidic

B) basic

C) amphiprotic

D) cannot predict

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• question_answer94) Wave number of spectral line for a given transition is $x\,c{{m}^{-1}}$ for $H{{e}^{+}}$, then its value for $B{{e}^{3+}}$ (isoelectronic of $H{{e}^{+}}$) for same transition is

A) $\frac{x}{4}c{{m}^{-1}}$

B) $x\,c{{m}^{-1}}$

C) $4x\,c{{m}^{-1}}$

D) $16x\,c{{m}^{-1}}$

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• question_answer95) ${{H}_{2}}{{O}_{2}}$ oxidises $Mn{{O}_{2}}$ is $MnO_{4}^{-}$ in basic medium, ${{H}_{2}}{{O}_{2}}$ and $Mn{{O}_{2}}$ react in the molar ratio of

A) 1 : 1

B) 2 : 1

C) 2 : 3

D) 3 : 2

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• question_answer96) mL of an aqueous solution of KC1 was found to require 20 mL of 1 M $AgN{{O}_{3}}$ solution when titrated using a ${{K}_{2}}Cr{{O}_{4}}$ as indicator. Depression in freezing point of $KCl$ solution with 100% ionisation will be [${{K}_{F}}={{2.0}^{o}}\,mo{{l}^{-1}}kg$, molarity = molality]

A) ${{3.2}^{o}}$

B) ${{1.6}^{o}}$

C) ${{0.8}^{o}}$

D) ${{5.0}^{o}}$

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• question_answer97) Out of the following, select Lux-Flood Acid

A) $C{{O}_{2}}$

B) $B{{F}_{3}}$

C) ${{H}^{+}}$

D) $Al{{(C{{H}_{3}})}_{3}}$

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• question_answer98) On adding $AgN{{O}_{3}}$ solution into $Kl$ solution, a negatively charged colloidal sol. is obtained when they are in

A) 100 m L of $0.1\,\,M\,AgN{{O}_{3}}+100\,mL$ of 0.1 M KI

B) 100 mL of $0.1\,\,M\,AgN{{O}_{3}}+100\,mL$ of 0.2 mKI

C) 100 mL of $0.1\,\,M\,AgN{{O}_{3}}+100\,mL$ of 0.1 M KI

D) 100 mL of $0.15\,\,M\,AgN{{O}_{3}}+100\,mL$ of 0.15 MKI

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• question_answer99) Graph between $\log \left( \frac{x}{m} \right)$ and log d is a straight line at angle ${{45}^{o}}$ with intercept OA as shown. Hence, $\left( \frac{x}{m} \right)$ at a pressure of 0.2 aim is A) 0.8

B) 0.6

C) 0.4

D) 0.2

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• question_answer100) From the following reactions at 298 K, [a] $Ca{{C}_{2}}(s)+2{{H}_{2}}O\,(l)\xrightarrow{{}}Ca{{(OH)}_{2}}(g)$$+{{C}_{2}}{{H}_{2}}(g)\,D{{H}^{o}}(kJ\,mo{{l}^{-1}})-127.9$ [b] $Ca\,(s)+\frac{1}{2}{{O}_{2}}(g)\xrightarrow{{}}CaO(s)-635.1$ [c] $CaO(s)+{{H}_{2}}O(I)\xrightarrow{{}}Ca{{(OH)}_{2}}$ $-(s)-65.2$ [d] $C\,\,(s)+{{O}_{2}}(s)\xrightarrow{{}}C{{O}_{2}}(s)-393.5$ [e] ${{C}_{2}}{{H}_{2}}(g)+\frac{5}{2}{{O}_{2}}(g)\xrightarrow{{}}2C{{O}_{2}}(g)$ $+{{H}_{2}}O\,(e)-1299.58$ Calculate the heat of formation of $Ca{{C}_{2}}(s)$ at 298 K.

A) $-59.82\,KJ\,\,mo{{l}^{-1}}$

B) $+59.82\,KJ\,\,mo{{l}^{-1}}$

C) $-190.22\,KJ\,\,mo{{l}^{-1}}$

D) $+190.22\,KJ\,\,mo{{l}^{-1}}$

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• question_answer101) Pineapple (annanas) fruit develops from

A) a unilocular polycarpellary flower

B) a multipistillate syncarpous flower

C) a cluster of compactly borne flowers on a common axis

D) a multilocular monocarpellary flower

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• question_answer102) Parthenocarpic tomato fruits can be produced by

A) removing androecium of flowers before pollen grains are released

B) treating the plants with low concentrations of gibberellic acid and auxins

C) raising the plants from vernalized seeds

D) treating the plants with phenylmercuric acetate

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• question_answer103) The blue baby syndrome results from

A) excess of chloride

B) methaemoglobin

C) excess of dissolved oxygen

D) excess of TDS (Total Dissolved Solids)

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• question_answer104) Which one of the following statements is correct?

A) Neurons regulate endocrine activity, but not wee versa |

B) Endocrine glands regulate neural activity and nervous system regulates endocrine glands

C) Neither hormones control neural activity nor the neurons control endocrine activity

D) Endocrine glands regulate neural activity, but not vice versa

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• question_answer105) Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?

A) Frequent irrigation of the crop

B) Treatment of the paints with cytokinins along with a small dose of nitrogenous fertiliser

C) Removal of ail yellow leaves and spraying the remaining green leaves with 2, 4, 5-trichlorophenoxy acetic acid

D) Application of iron and magnesium to promote synthesis of chlorophyll

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• question_answer106) Which one of the following amino acids was not found to be synthesised in Millers experiment?

A) Glycine

B) Aspartic acid

C) Glutamic acid

D) Alanine

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• question_answer107) Crop plants grown in monoculture are

A) low in yield

B) free from intraspecific competition

C) characterised by poor root system,

D) highly prone to pests

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• question_answer108) The formula for exponential population growth is

A) $dt/dN=rN$

B) $dN/rN=dt$

C) $rN/dN=dt$

D) $dN/dt=rN$

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• question_answer109) In photosystem-I, the first electron acceptor is

A) ferredoxin

B) cytochrome

C) plastocyanin

D) an iron-sulphur protein

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• question_answer110) Which one of the following is the most suitable, medium for culture of Drosophila melanogaster?

A) Moist bread

B) Agar agar

C) Ripe banana

D) Cow dung

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• question_answer111) Which antibiotic inhibits interaction between rRNA and wRNA during bacterial protein synthesis?

A) Erythromycjn

B) Neomycin

C) Streptomycin

D) Tetracycline

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• question_answer112) Photochemical smog pollution does not contain

A) ozone

B) nitrogen dioxide

C) carbon dioxide

D) PAN (Peroxy AcyI Nitrate)

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• question_answer113) The thalloid body of a slime mould (Myxomycetes) is known as

A) protonema

B) Plasmodium

C) fruiting body

D) mycelium

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• question_answer114) What type of placentation is seen in sweet pea?

A) Basal

B) Axile

C) Free central

D) Marginal

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• question_answer115) Long filamentous threads protruding at the end of a young cob of maize are

A) anthers

B) styles

C) ovaries

D) hairs

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• question_answer116) How many different kinds of gametes will be produced by a plant having the genotype AABbCC?

A) Three

B) Four

C) Nine

D) Two

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• question_answer117) Which of the following statements regarding mitochondrial membrane is not correct?

A) The outer membrane is permeable to all kinds of molecules

B) The enzymes of the electron transfer chain are embedded in the outer membrane

C) The inner membrane is highly convoluted forming a series of infoldings

D) The outer membrane resembles a sieve

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• question_answer118) An organic substance bound to an enzyme and essential for its activity is called

A) coenzyme

B) holoenzyme

C) apoenzyme

D) isoenzyme

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• question_answer119) Bowmans glands are found in

A) olfactory epithelium

B) external auditory ca. ial

C) cortical nephrons only

D) juxtamedullary nephrons

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• question_answer120) The bacterium (Clostridium botulinum) that causes botulism is

A) a facultative anaerobe

B) an obligate anaerobe

C) a facultative aerobe

D) an obligate aerobe

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• question_answer121) Sulphur is an important nutrient for optimum growth and productivity in

A) pulse crops

B) cereals

C) fibre crops

D) oilseed crops

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• question_answer122) In a moss the sporophyte

A) is partially parasitic on the gametophyte

B) produces gametes that give rise to the gametophyte

C) arises from a spore produced from the gametophyte

D) manufactures food for itself, as well as for the gametophyte

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• question_answer123) Curing of tea leaves is brought about by the activity of

A) bacteria

B) mycorrhiza

C) viruses

D) fungi

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• question_answer124) Annual migration does not occur in the case of

A) salmon

B) Siberian crane

C) salamander

D) arctic tern

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• question_answer125) A major break through in the studies of cells came with the development of electron microscope. This is because

A) the resolution power of the electron microscope is much higher than that of the light microscope

B) the resolving power of the electron microscope is 200 - 350 nm as compared to 0.1 - 0.2 nm for the light microscope

C) electron beam can pass through thick materials, whereas light microscopy requires thin sections

D) the electron microscope is more powerful than the light microscope as it uses a beam of electrons which has wavelength much longer than that of photons

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• question_answer126) Metameric segmentation is the characteristic of

A) Platyhelminthes and Arthropoda

B) Echinodermata and Annelida

C) Annelida and Arthropoda

D) Mollusca and Chordata

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• question_answer127) What is common about Trypanosoma, Noctiluca, Monocystis and Giardiat

A) These are all unicellular protists

B) They have flagella

C) They produce spores

D) These are ail parasites

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• question_answer128) Evolutionary history of an organism is known as

A) Phylogeny

B) Ancestry

C) Paleontology

D) Ontogeny

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• question_answer129) Which of the following is considered a hot-spot of biodiversity in India?

A) Western ghats

B) Indo-Gangetic plain

C) Eastern ghats

D) Aravalli hills

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• question_answer130) Which one of the following is an example of polygenic inheritance?

A) Flower colour in Mirabilis jalapa

B) Production of male honey bee

C) Pod shape in garden pea

D) Skin colour in humans

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• question_answer131) Which one of the following not act as a neurotransmitter?

A) Acetylcholine

B) Epinephrine

C) Nor epinephrine

D) Cortisone

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• question_answer132) A steroid hormone which regulates glucose metabolism is

A) cortisol

B) corticosterone

C) 1-1-deoxycorticosterone

D) cortisone

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• question_answer133) Which one of the following is not a second messenger in hormone action?

A) cGMP

B) Calcium

C) Sodium

D) cAMP

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• question_answer134) In Mendels experiments with garden pea, round seed shape (RR) was dominant over wrinkled seeds (IT), yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the ${{F}_{2}}$ generation of the cross RRYY $x$ rryy?

A) Only round seeds with green cotyledons

B) Only wrinkled seeds with yellow cotyledons

C) Only wrinkled seeds with green cotyledons

D) Round seeds with yellow cotyledons and wrinkled seeds with yellow cotyledons

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• question_answer135) One turn of the helix in a B-form DNA is approximately

A) 20 nm

B) 0.34 nm

C) 3.4 nm

D) 2 nm

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• question_answer136) Antiparallel strands of a DNA molecule means that

A) one strand turns anti-clockwise

B) the phosphate groups of two DNA strands, at their ends, share the same position

C) the phosphate groups at the start of two DNA strands are in opposite position (pole)

D) one strand turns clockwise

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• question_answer137) Mast cells secrete

A) hippurin

B) myoglobin

C) histamine

D) haemoglobin

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• question_answer138) If a colourblind woman marries a normal visioned man, their sons will be

A) all normal visioned

B) one-half colourblind and one-half normal

C) three-fourths colourbling and one-fourth normal

D) all colourblind

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• question_answer139) Antibodies in our body are complex

A) lipoproteins

B) steroids

C) prostaglandins

D) glycoproteins

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• question_answer140) Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste water into natural surface water, is

A) < 3.0 ppm

B) < 10 ppm

C) < 100ppm

D) < 30 ppm

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• question_answer141) Earthworms are

A) ureotelic when plenty of water is available

B) uricotelic when plenty of water is available

C) uricotelic under conditions of water scarcity

D) ammonotelic when plenty of water is available

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• question_answer142) Withdrawal of which of the following hormones is the immediate cause of menstruation?

A) Oestrogens

B) FSH

C) FSH-RH

D) Progesterone

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• question_answer143) Which one of the following statements is incorrect?

A) The residual air in lungs slightly decreases the efficiency of respiration in mammals

B) The presence of non-respiratory air sacs, increases the efficiency of respiration in birds

C) (n insects, circulating body fluids serve to distribute oxygen to tissues

D) The principle of countercurrent flow facilitates efficient respiration in gills of fishes

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• question_answer144) The translocation of organic solutes in sieve tube members is supported by

A) root pressure and transpiration pull

B) P-proteins

C) mass flow involving a carrier and ATP

D) cytoplasmic streaming

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• question_answer145) An enzyme that can stimulate germination of barley seeds is

A) a-amylase

B) lipase

C) protease

D) invertase

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• question_answer146) In a cereal grain the single cotyledon of embryo is represented by

A) coleorhiza

B) scutellum

C) prophyll

D) coleoptile

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• question_answer147) The majority of carbon dioxide produced by our body cells is transported to the lungs

A) dissolved in the blood

B) as bicarbonates

C) as carbonates

D) attached to haemoglobin

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• question_answer148) In order to obtain virus-free plants through tissue culture the best method is

A) protoplast culture

B) embryo rescue

C) anther culture

D) meristem culture

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• question_answer149) Sickle-cell anaemia has not been eliminated from the African population because

A) it is controlled by recessive genes

B) it is not a fatal disease

C) it provides immunity against malaria

D) it is controlled by dominant genes

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• question_answer150) Both sickle-cell anaemia and Huntingtons chorea are

A) bacteria-related diseases

B) congenital disorders

C) pollutant-induced disorders

D) virus-related diseases

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