# Solved papers for AMU Medical AMU Solved Paper-1998

### done AMU Solved Paper-1998

• question_answer1) The moving fan has a constant angular acceleration of$\pi /6$$rad/{{s}^{2}}$. If it starts from rest, the number of revolution it makes in one minute is

A) 1600

B) 500

C) 350

D) 150

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• question_answer2) A ball of mass 200 gm, moving with a speed of 40 m/s, is deflected exactly with the same speed but at$90{}^\circ$with its incident direction after striking with a bat. If the striking time is 2 s, the average force acts on the ball is

A) 4.0 N

B) $4/\sqrt{2}N$

C) $4\sqrt{2}N$

D) zero

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• question_answer3) A particle of mass m is moving in a circular path of constant radius r such that its centripetal acceleration${{a}_{c}}$is varying with time $t$ as${{a}_{c}}={{k}^{4}}r{{t}^{2}}$where k is constant. The power delivered to the particle by the forces acting on it is

A) $m{{k}^{2}}{{r}^{2}}{{t}^{2}}$

B) $m{{k}^{2}}{{r}^{2}}t$

C) $\pi m{{k}^{2}}{{r}^{2}}{{t}^{2}}$

D) $m{{k}^{4}}{{r}^{2}}t$

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• question_answer4) A projectile is thrown obliquely into the air from origin of a reference frame with y-axis vertically upward and$x-$axis perpendicular to y then equation of motion has the form

A)  $y=ax+b{{x}^{2}}$

B)  $y=a{{x}^{2}}+b{{x}^{3}}$

C)  $y=a+bx$

D)  $y=(a+b)x$

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• question_answer5) The moment of inertia, of an annular cylinder of mass M, length L and inner and outer radii${{R}_{1}}$and${{R}_{2}}$about the axis of the cylinder is

A) $M(R_{2}^{2}-R_{1}^{2})/2$

B) $\frac{M}{2{{L}^{2}}}(R_{2}^{4}-R_{1}^{4})$

C) $M(R_{2}^{2}+R_{1}^{2})/2$

D) $M{{({{R}_{2}}-{{R}_{1}})}^{2}}/2$

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• question_answer6) A large number of bullets are fired in all the directions with the speed of 10 m/sec. The maximum area on the ground on which these bullets will spread is about$(g=10\text{ }m/se{{c}^{2}})$

A) $100\,{{m}^{2}}$

B) $250\,{{m}^{2}}$

C) $314\,{{m}^{2}}$

D) $506.5\text{ }{{m}^{2}}$

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• question_answer7) An aeroplane is flying horizontally with a velocity of 216 km/h and at a height of 1960 m. When it is vertically above a point A on the ground, a bomb is released from it. The bomb strikes the ground at point B. The distance AB is (ignoring air resistance)

A) 1200m

B) 0.33 km

C) 3.33km

D) 33 km.

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• question_answer8) A ball is thrown with a kinetic energy E at an angle of$45{}^\circ$with the horizontal in the earths gravitational field. The change in its potential energy at the highest point of its flight with respect to the starting point will be

A) $+\frac{E}{\sqrt{2}}$

B) $+\frac{E}{2}$

C) $-\frac{E}{\sqrt{2}}$

D) $-\frac{E}{2}$

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• question_answer9) A particle is projected vertically upward. The value of g is$10\text{ }m/se{{c}^{2}}$. If 10 and 16 seconds be the times at which it is at the same height while ascending and descending respectively. Then velocity of projection is

A) 260 m/sec

B) 160 m/sec

C) 130 m/sec

D) 110 m/sec

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• question_answer10) Which of the following pairs does not have same dimension?

A) angular momentum and Plancks constant

B) moment of inertia and moment of force

C) work and torque

D) impulse and momentum.

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• question_answer11) One-third of spring having force constant k is cut and mass m is suspended to it. If the frequency of oscillation of the original spring with the same mass is/then the frequency of oscillation in one-third of spring is

A) $\frac{1}{\sqrt{3}}f$

B) $\sqrt{3}f$

C) $2f$

D) $\frac{2}{\sqrt{3}}f$

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• question_answer12) A copper ball is heated to$100{}^\circ C$. It cools to $80{}^\circ C$in 5 minutes and to$65{}^\circ C$in 10 minutes. The temperature of the surrounding is

A) $13{}^\circ C$

B) $15{}^\circ C$

C) $18{}^\circ C$

D) $20{}^\circ C$

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• question_answer13) The ratio of specific heat at constant volume${{C}_{V}}$for monoatomic gas to that of polyatomic gas i.e.${{C}_{V}}$(monoatomic)/${{C}_{V}}$(polyatomic) is

A) 1

B) 5/6

C) 5/3

D) 1/2

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• question_answer14) The rate of difusion is

A) faster in solids than in liquids and gases

B) faster in liquids than in solids and gases

C) equal to solids, liquids and gases

D) faster in gases than in liquids and solids.

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• question_answer15) A beaker of radius 6 cm is filled with mercury up to a height to 12 cm. Given that the density of mercury is$13600\text{ }kg/{{m}^{3}},$the force exerted by the mercury on the bottom of the beaker is approximately.

A) 184 N

B) 1100N

C) 1200 N

D) 1300 N

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• question_answer16) The length of a needle floating on water is 2.5 cm. How much minimum force, in addition to the weight of the needle will be needed to lift the needle above the surface of water? Surface tension of water is$7.2\times {{10}^{-4}}N/cm$.

A) $7.2\times {{10}^{-4}}N$

B) $18.0\times {{10}^{-4}}N$

C) $36.0\times {{10}^{-4}}N$

D) none of the above

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• question_answer17) A metal beam having coefficient of linear expansion$\alpha$Youngs modulus $Y$, area of across section a and length L, is clamped at both ends. After cooling by$t{}^\circ C,$the force exerted in the clamp is

A) $YL\alpha t$

B) $Y\alpha a$

C) $YaL\alpha t$

D) $Ya\alpha t$

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• question_answer18) The rotation period of an earth satellite close to the surface of the earth is 83 minutes. The satellite in an orbit at a distance of three times earth radii from 2 jts surface will be

A) 83 minutes

B) $83\times \sqrt{8}$ minutes

C) 664 minutes

D) 249 minutes.

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• question_answer19) Two satellites A and B of equal mass are orbiting earth at altitudes R and 4R where R is the radius of the earth. The ratio of their kinetic energies is

A) 2

B) 1/4

C) 4

D) 5/2

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• question_answer20) The ratio of the angular momenta associated with the earths rotation about its own axis and earths orbital motion is (radius of earth$=6\times {{10}^{6}}$m and mean earth-sun distance$=1.5\times {{10}^{11}}m$)

A) $2.5\times {{10}^{-7}}:1$

B) $1:2.5\times {{10}^{-4}}$

C) $1:1$

D) $4\times {{10}^{-5}}:1$

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• question_answer21) A 10-volt battery of negligible internal resistance is connected to$50\,\Omega$,resistance coil. The heat energy produced in 1 hour is

A) 1714.3 calories

B) 1530.5 calories

C) 1050.0 calories

D) 850.8 calories

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• question_answer22) Consider the following two facts about the free electron density in metals [A] it is different in different metals. [B] it is different at different temperatures in a metal. In view of the above, the Seebeck effect is caused

A) due to both A and B

B) due to A but not due to B

C) due to B but not due to A

D) neither due to A nor due to B

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• question_answer23) When each of n identical resistance of resistance r are connected in series, the effective resistance is R. If these resistances are connected in parallel, the effective resistance of the combination will be

A) $R{{n}^{2}}$

B) ${{n}^{2}}/r$

C) $R{{r}^{2}}$

D) ${{r}^{2}}/R$

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• question_answer24) A$10\,\mu F$capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt. The capacitance of second capacitor is

A) $15\,\mu F$

B) $30\,\mu F$

C) $20\,\mu F$

D) $10\,\mu F$

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• question_answer25) Three wires whose lengths are in the ratio 2:6:18 and radii in the ratio$1:2:3$are connected in parallel. The ratio of the currents through them is

A) $1:\frac{1}{2}:\frac{1}{6}$

B) $\frac{1}{2}:\frac{2}{5}:\frac{4}{3}$

C) $3:3:4$

D) $3:4:3$

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• question_answer26) A charge q is divided in two parts Q and$(q-Q)$ If the magnitude of the force of repulsion between these two charges placed at certain separation is to be maximum the ratio $q:(q-Q)$ is

A) $4:1$

B) $2:1$

C) $1:1$

D) $1:2$

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• question_answer27) A hemispherical surface of the radius R is placed in a uniform electric field of strength E parallel to axis of the hemisphere. The electric flux through the curved surface of the hemisphere is

A) zero

B) $3\pi {{R}^{2}}E$

C) $2\pi {{R}^{2}}E$

D) $\pi {{R}^{2}}E$

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• question_answer28) Each of the two conducting spheres of radius 5 cm and 10 cm is given a charge of$15\mu C$. After charging the spheres are connected by conducting wire. The charge on the smaller spheres after the connection is equal to.

A) $7.5\mu C$

B) $15\mu C$

C) $10\mu C$

D) $20\mu C$

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• question_answer29) The velocity acquired by a particle of charge q and mass m moving through a potential difference of V volts will be

A) $2qV/m$

B) $\sqrt{2qm/V}$

C) $\sqrt{m/2qV}$

D) $\sqrt{2qV/m}$

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• question_answer30) The difference between the apparent frequencies of whistle as perceived by an observer in rest during approach and recession of the train is 1%. If velocity of sound is 320 m/sec. The velocity of the train is

A) 5.7 km/hour

B) 7.2 km/hour

C) 10.3 km/hour

D) 44.8 km/hour

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• question_answer31) An object of size 4 cm is placed 40 cm from a lens. An image is formed on a screen placed 80 cm on the other side of the lens. Which of the following statement is true?

A) lens is convex, image is virtual and erect

B) lens is convex, image is real and inverted

C) lens is concave, image is real and inverted

D) lens is concave,, image is real and erect

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• question_answer32) An object is placed in front of a convex mirror at a distance equal to focal length of mirror. The magnification of the object is

A) zero

B) $\infty$

C) $\frac{1}{2}$

D) 2

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• question_answer33) The intensity ratio of the maxima and minima in an interference pattern produced by two coherent sources of light is 9 1. The intensities of the used light sources are in ratio

A) $3:1$

B) $4:1$

C) $9:1$

D) $10:1$

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• question_answer34) In Youngs double slit experiment if separation between the slits is halved, the fringe width is

A) halved

B) doubled

C) unchanged

D) quadrupled

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• question_answer35) Who produced electromagnetic waves first?

A) Marconi

B) Maxwell

C) J.C. Bose

D) Hertz

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• question_answer36) A series RLC circuit is connected to 230V source where$R=40\,\Omega ,L=2H,C=50\mu F$. The amplitude of current at resonance is

A) 6.25 A

B) 5.25 A

C) 5.75 A

D) 8.13 A

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• question_answer37) The variation of inductive reactance$({{X}_{L}})$and capacitive reactance $({{X}_{c}})$is shown in figure. The condition of resonance occurs at points A) A

B) B

C) C

D) D

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• question_answer38) A magnet makes 30 vibrations per minute at a place, How many vibrations will it make per minute if it is remagnetized so that its pole strength is doubled

A) $\sqrt{{}}600$

B) $\sqrt{{}}1200$

C) $\sqrt{{}}1800$

D) $\sqrt{{}}445$

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• question_answer39) A current of 5 amp flows in a circular loop of radius 5 cm. The loop is placed in a uniform magnetic field of 5 tesia such that plane of loop is perpendicular to the direction of magnetic field. The net magnetic force acting on the loop if there are 5 turns, is

A) zero

B) $\frac{{{\mu }_{0}}}{4\pi }\times 6.2$newton

C) 12.5 newton

D) none of the above

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• question_answer40) A wire of length L carrying a current$I$ampere is bent into from of a circle. The magnitude of magnetic moment is

A) $IL$

B) ${{I}^{2}}L$

C) $I{{L}^{2}}$

D) $I{{L}^{2}}/4\pi$

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• question_answer41) Two stars A and B at equal surface temperature. Star A has surface area four times that of B. The ratio in the luminosities of A and B will be

A) $\begin{matrix} 1 & 16 \\ \end{matrix}$

B) $\begin{matrix} 1 & 4 \\ \end{matrix}$

C) $\begin{matrix} 16 & 1 \\ \end{matrix}$

D) $\begin{matrix} 4 & 1 \\ \end{matrix}$

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• question_answer42) Hole and electron mobilities of semiconductor are 0.05 and$0.15\,{{m}^{2}}{{V}^{-1}}s$. An electric field of strength$4\text{ }Vc{{m}^{-1}}$is applied to it. The ratio of drift velocities of electron and hole is

A) 1

B) 2

C) 3

D) 4

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• question_answer43) The output of the following logic circuit is A) $Y=\overline{A}\div \overline{B}$

B) $Y=\overline{A}.\overline{B}$

C) $Y=\overline{A.B}$

D) $Y=\overline{A+B}$

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• question_answer44) In a (BJT) bipolar junction transistor

A) $\alpha =\beta$

B) $\beta <\alpha$

C) $\beta =\frac{\alpha }{1+\alpha }$

D) $\beta =\frac{\alpha }{1-\alpha }$

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• question_answer45) Forbidden energy gap for diamond is of the order of

A) 0.1 eV

B) 1.0 eV

C) 6 eV

D) none of the above

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• question_answer46) In the gamma decay of a nucleus

A) both the atomic number and the atomic mass number increase by one unit

B) both the atomic number and atomic mass number decrease by one unit

C) the atomic number decrease by one unit

D) none of the above

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• question_answer47) The mass defect in a nuclear reaction is 0.25 percent. The energy liberated by fusion of one kg matter will be

A) $2.25\times {{10}^{7}}J$

B) $2.25\times {{10}^{14}}J$

C) $6.75\times {{10}^{10}}J$

D) $4.5\times {{10}^{7}}J$

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• question_answer48) Which one of the following element has highest 55, binding energy per nucleon?

A) He

B) Fe

C) Th

D) U

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• question_answer49) When the electrons in hydrogen atom jumps from the orbit with$n=2$to$n=1$the frequency of emitted radiation is o. If the electron jumps from the orbit with$n=3$to$n=2$frequency of the emitted is

A) $\frac{5}{27}\upsilon$

B) $\frac{5}{36}\upsilon$

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

D) none of the above

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• question_answer50) An X-ray tube is operated at 1 kV. The kinetic energy of electrons hitting the anticathode is

A) $\ge 18KeV$

B) $=18\text{ }keV$

C) $\le 18KeV$

D) none of the above

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• question_answer51) Which is correct increasing order of their tendency to from${{M}^{3-}}$ion?

A) $Bi>Sb>As>P>N$

B) $Bi<Sb<As<P<N$

C) $N<P<Sb<Bi<As$

D) $Bi>Sb\tilde{\ }N\tilde{\ }P>As$

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• question_answer52) Which is first rare gas compound discovered in 1962?

A) $Xe{{F}_{2}}$

B) $Xe{{O}_{4}}$

C) $XePt{{F}_{6}}$

D) $Xe{{F}_{6}}$

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• question_answer53) A radio isotope decays of such a rate that after 100 minutes only eight of the original amount remains, the half life of radio isotope is

A) 31.3 min

B) 32.3 min

C) 33.3 min

D) 34.3 min

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• question_answer54) Freundlich Adsorption Isotherm$x/m=k{{p}^{1/m}}$may be graphically represented as

A) B) C) D) View Answer play_arrow
• question_answer55) Which polymer is used for making magnetic recording tapes?

A) dacron

B) acrilan

C) glyptal

D) bakelite

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• question_answer56) Amino acids, which build up proteins, have both the carboxylic and amino groups. These amino acids are

A) $\alpha -$amino acids

B) $\beta -$amino acids

C) $\gamma -$amino acids

D) position of amino and carboxylic groups are unspecified

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• question_answer57) Which of the following amino acids is basic in nature?

A) Serine

B) Glutamine

C) Arginine

D) none of these.

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• question_answer58) $\underset{\begin{smallmatrix} | \\ C{{H}_{2}}OOCR \end{smallmatrix}}{\overset{\begin{smallmatrix} C{{H}_{2}}OCR \\ | \end{smallmatrix}}{\mathop{CHOOCR}}}\,\xrightarrow[Hydrolysis]{Enzyne}\underset{\begin{smallmatrix} | \\ C{{H}_{2}}OH \end{smallmatrix}}{\overset{\begin{smallmatrix} C{{H}_{2}}OH \\ | \end{smallmatrix}}{\mathop{CHOH}}}\,+\underset{\begin{smallmatrix} + \\ R\,COOH \end{smallmatrix}}{\overset{\begin{smallmatrix} RCOOH \\ + \end{smallmatrix}}{\mathop{RCOOH}}}\,$ The enzyme used in the above reaction is

A) amylase

B) lactase

C) lipase

D) invertase

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• question_answer59) The general structure of penicillin is In ampicillin R =

A) B) C) $-C{{H}_{2}}-CH=CH-C{{H}_{2}}-C{{H}_{3}}$

D) $(C{{H}_{3}}){{(C{{H}_{2}})}_{6}}-$

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• question_answer60) The ionization energy of elements in period increases as we proceed from left to right because

A) the number of electrons increases successively

B) the number of neutrons increases successively

C) the number protons increases successively

D) electrons being filled in orbitals with same principal quantum number repel each-other

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• question_answer61) A corked flask containing boiling water and its vapour is allowed to cool down to room temperature. If water and its vapour as a whole is the system then

A) $\Delta S>0$and $-\Delta H=$loss of heat in cooling

B) $\Delta S<0$ and$-\Delta H=$loss of heat in cooling

C) $\Delta S>0$and $-\Delta E=$loss of heat in cooling

D) $\Delta S<0$and$-\Delta E=$loss of heat in cooling

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• question_answer62) At$0{}^\circ K,$(i)${{C}^{12}}$and (ii) a mixture of${{C}^{12}}$and${{C}^{14}}$ will

A) both have zero entropy

B) both have positive entropy

C) have equal entropies per mole

D) have unequal entropies

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• question_answer63) At any instant during the reaction $Zn+C{{u}^{++}}\to Z{{n}^{++}}$ $+Cu$occurring in an open beaker at temperature T

A) $\Delta G{}^\circ =-RT$in$\frac{[Z{{n}^{++}}].[Cu]}{[Zn].[C{{u}^{++}}]}$

B) $-\Delta G=$work available from the reaction

C) $\Delta G=0$

D) $\Delta G<0$

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• question_answer64) The first order rate constant is expressed as $K=\frac{2.303}{t}\log ({{C}_{0}}/{{C}_{t}})$while $K$depends on

A) time $(t)$

B) initial concentration of the reactant $({{C}_{0}})$

C) the ratio ${{C}_{0}}/{{C}_{t}}$

D) all of these

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• question_answer65) The general reaction $R-X\xrightarrow[{}]{aq\,H{{O}^{-}}}ROH+{{X}^{O-}}$ is expected to follow decreasing order of reactivity as in

A) $t-Bui>t-BuBr>t-BuCl>t-Bu-F$

B) $t-BuF>t-BuCl>t-BuBr>t-Bul$

C) $t-BuBr>t-BuCl>t-Bul>t-BuF$

D) $t-BuF>t-BuCl>t-Bul>t-BuBr$ ($t-Bu=$tertiary Butyl group)

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• question_answer66) Under basic conditions which one suffers elimination the most?

A) ${{(C{{H}_{3}})}_{3}}CCl$

B) $C{{H}_{3}}C{{H}_{2}}-\underset{\begin{smallmatrix} | \\ Cl \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{3}}$

C) $C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}-C{{H}_{2}}-Cl$

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• question_answer67) The percentage strength (in g $litr{{e}^{-1}}$) of 10 ml of 20 vol. solution of${{H}_{2}}{{O}_{2}}$is

A) 220.4

B) 110.2

C) 150.5

D) 60.7

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• question_answer68) Which of the following is low boiling liquid?

A) HF

B) $HCl$

C) $HBr$

D) $HI$

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• question_answer69) Which of the following statement about water is wrong?

A) it can act as a base

B) it can act as an acid

C) it can act both as an acid and as a base

D) it can act neither as acid nor as base

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• question_answer70) The brown ring formation in the test for nitrate is due to

A) ${{[Fe({{H}_{2}}O){{(NO)}_{5}}]}^{2+}}$

B) ${{[Fe{{({{H}_{2}}O)}_{5}}(NO)]}^{2+}}$

C) $Fe{{(N{{O}_{3}})}_{3}}$

D) ${{[Fe{{({{H}_{2}}O)}_{5}}(N{{O}_{2}})]}^{2+}}$

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• question_answer71) The Markownikoffs addition rule is applicable for the reaction between

A) Symmetrical alkene$+$Symmetrical reagent

B) Symmetrical alkene$+$Unsymmetrical reagent

C) Unsymmetrical alkene$+$Symmetrical reagent

D) Unsymmetrical alkene$+$Unsymmetrical reagent

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• question_answer72) An alkene, ${{C}_{6}}{{H}_{12}}$on ozonolysis gives acetone and propanal. It has the structure

A) B) $C{{H}_{3}}C{{H}_{2}}-CH=CH-C{{H}_{2}}-C{{H}_{3}}$

C) D) View Answer play_arrow
• question_answer73) An unknown compound A has a molecular formula${{C}_{4}}{{H}_{6}},$when A is treated with an excess of$B{{r}_{2}},$a new substance B with formula ${{C}_{4}}{{H}_{6}}B{{r}_{4}}$is formed. A forms a white precipitate with ammoniacal silver nitrate solution. A may be

A) Butyne-1

B) Butyne - 2

C) Butene - 1

D) Butene - 2.

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• question_answer74) In Lassaigne test a violet colour obtained indicates the presence of

A) nitrogen

B) sulphur

C) halogen

D) none of the above

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• question_answer75) Hereditary characteristic are passed on from parents to children through

A) Gametes

B) Genes

C) Mutants

D) Enzymes

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• question_answer76) Which of the following covalent bonds has highest ionic character?

A) $H-F$

B) $H-Cl$

C) $H-Br$

D) $H-\text{I}$

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• question_answer77) The isomeric forms known for xylene are

A) 2

B) 3

C) 4

D) 5

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• question_answer78) The shape of benzene is

A) linear

B) tetrahedral

C) planar

D) pyramidal

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• question_answer79) The hybridization of carbon in$C-C$single bond of $CH=CH-C\equiv CH$is

A) $sp-sp$

B) $sp-s{{p}^{2}}$

C) $s{{p}^{2}}-sp$

D) $s{{p}^{2}}-s{{p}^{2}}$

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• question_answer80) An ideal solution shows a vapour pressure of 80 torr when the mole-fraction of the solute is 0.2. At the same temperature, the vapour pressure of the pure solvent should be

A) 64 torr

B) 80 torr

C) 100 torr

D) 400 torr

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• question_answer81) For the reactions (I) ${{H}_{2}}(g)+{\scriptstyle{}^{1}/{}_{2}}{{O}_{2}}(g)\xrightarrow[{}]{{}}{{H}_{2}}O(g)+{{x}_{1}}kJ$ (II) ${{H}_{2}}(g)+{\scriptstyle{}^{1}/{}_{2}}{{O}_{2}}(g)\xrightarrow[{}]{{}}{{H}_{2}}O(g)+{{x}_{2}}kJ$ Which one is correct?

A) ${{x}_{1}}<{{x}_{2}}$

B) ${{x}_{1}}={{x}_{2}}$

C) ${{x}_{1}}>{{x}_{2}}$

D) ${{x}_{1}}-{{x}_{2}}=0$

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• question_answer82) For the reaction$2S{{O}_{3}}(g)\xrightarrow[{}]{{}}2S{{O}_{2}}(g)+{{O}_{2}}(g)$the entropy change$(\Delta S)$is

A) $\Delta S>0$

B) $\Delta S<0$

C) $\Delta S=0$

D) $\Delta S<\frac{\Delta H}{T}$

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• question_answer83) The value of$\Delta S$for the reaction$Zn+C{{u}^{++}}=Z{{n}^{++}}$$+Cu$conducted reversibly in galvanic cell is$Q/T$at temperature T. Its value for the same reaction will be

A) $Q/T$ if conducted irreversibly

B) above$Q/T$if conducted irreversibly

C) $\Delta H/T$if conducted irreversibly

D) $Q/T$at temperature T

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• question_answer84) Which among following cannot be a Bronsted acid?

A) $NH_{4}^{+}$

B) $HSO_{3}^{-}$

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

D) $S{{O}_{2}}$

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• question_answer85) Addition of sodium acetate to aqueous $C{{H}_{3}}COOH$solution

A) increases both pH and % dissociation of $C{{H}_{3}}COOH$

B) decreases both pH and % dissociation of $C{{H}_{3}}COOH$

C) increases pH and decreases % dissociation of$C{{H}_{3}}COOH$

D) decreases pH and increase% dissociation of $C{{H}_{3}}COOH$

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• question_answer86) Oxidation numbers of carbon in$C{{H}_{2}}C{{l}_{2}},C{{O}_{2}}$ and$CO_{3}^{2-}$are respectively

A) $0,+4,+4$

B) $+2,+2,-2$

C) $+4,+4,+4$

D) $-4,+4,+2$

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• question_answer87) Oxidation number of iron in${{[Fe{{(CN)}_{6}}]}^{4-}}$is

A) $+2$

B) $+3$

C) $-3$

D) $-4$

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• question_answer88) Which one has maximum ionic character?

A) $Pb{{F}_{2}}$

B) $PbC{{l}_{2}}$

C) $PbB{{r}_{2}}$

D) $Pb{{l}_{2}}$

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• question_answer89) Zinc reacts with dilute$HN{{O}_{3}}$to give

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

B) $N{{O}_{2}}$

C) ${{N}_{2}}{{O}_{4}}$

D) $N{{H}_{4}}N{{O}_{3}}$

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• question_answer90) The${{K}_{w}}$for autoprotolysis of water at 298K $2{{H}_{2}}{{O}_{(l)}}\rightleftharpoons {{H}_{3}}{{O}^{+}}_{(aq)}+O{{H}^{-}}_{(aq)}$is

A) ${{10}^{-14}}mo{{l}^{2}}{{L}^{-2}}$

B) ${{10}^{-14}}mo{{l}^{-1}}{{L}^{-1}}$

C) ${{10}^{-4}}mol{{L}^{-1}}$

D) ${{10}^{-4}}mo{{l}^{2}}{{L}^{-1}}$

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• question_answer91) Which one of the following is most likely to form an ionic bond?

A) H and $O$

B) H and $Cl$

C) H and N

D) Na and $Cl$

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• question_answer92) The conjugate base of$O{{H}^{-}}$is

A) ${{H}^{+}}$

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

C) $OH_{2}^{-}$

D) ${{O}^{2-}}$

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• question_answer93) ${{K}_{3}}Fe{{(CN)}_{6}}+\overline{e}\xrightarrow[{}]{{}}{{K}_{4}}Fe{{(CN)}_{6}}$is known as

A) ioriization

B) oxidation

C) reduction

D) none of these

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• question_answer94) If 100 g iron powder (at. wt. of$Fe=56$) is heated with 32 g of sulphur, (at wt. of$S=32$) to prepare one mol of iron sulphide how much iron powder will remain unreacted?

A) 4 g

B) 32 g

C) 44 g

D) Nil

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• question_answer95) One mole of ideal gas is filled in 2 litre flask at $0{}^\circ C,$the pressure of the gas will be

A) 1 atm

B) 11.2 atm

C) 22.4 atm

D) 44.8 atm

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• question_answer96) Translational kinetic energy for 2 moles of gas at$27{}^\circ C$is

A) $7.48\times {{10}^{3}}J$

B) $6.48\times {{10}^{3}}J$

C) $5.48\times {{10}^{3}}J$

D) $4.48\times {{10}^{3}}J$

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• question_answer97) The molecular mass of an unknown gas that diffuses twice as fast as oxygen is

A) $0.032\text{ }kg\text{ }mo{{l}^{-1}}$

B) $0.016\text{ }kg\text{ }mo{{l}^{-1}}$

C) $0.004\text{ }kg\text{ }mo{{l}^{-1}}$

D) $0.008\text{ }kg\text{ }mo{{l}^{-1}}$

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• question_answer98) Which of the following bonds will be have highest ionic character?

A) $H-F$

B) $H-Cl$

C) $H-Br$

D) $H-I$

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• question_answer99) Which of the following expression represents the energy of electron in a hydrogen atom?

A) $E=\frac{2{{\pi }^{2}}m{{e}^{4}}}{{{h}^{2}}}\frac{1}{{{n}^{2}}}$

B) $E=\frac{4{{\pi }^{2}}m{{e}^{2}}}{{{h}^{2}}}\frac{1}{{{n}^{2}}}$

C) $E=-\frac{2{{\pi }^{2}}m{{e}^{4}}}{{{h}^{2}}}\frac{1}{{{n}^{2}}}$

D) $E=-\frac{4{{\pi }^{2}}m{{e}^{2}}}{{{h}^{2}}}\frac{1}{{{n}^{2}}}$

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• question_answer100) For a reaction in a galvanic cell the value of$(-\Delta G)$at temperature T is not necessarily equal to

A) $nF{{E}_{cell}}$

B) RT In k

C) $T\Delta S-\Delta H$

D) zero

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• question_answer101) A bacterial cell divides in every minute. It takes one hour to fill a cup. How much time it will take to fill the half cup?

A) 59 minutes

B) 30 minutes

C) 29 minutes

D) 58 minutes.

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• question_answer102) The role of the oxidative pentose phosphate pathway is to generate reducing potential in the form of

A) NADPH only

B) NADH only

C) FADH only

D) FADH and NADH.

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• question_answer103) Five gram mole of glucose, on complete oxidation releases

A) 3430 k. calories of energy

B) 343 k. calories of energy

C) 3030 k. calories of energy

D) 430 k. calories of energy.

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• question_answer104) Conversion of phosphoglyceraldehyde to 1, 3- biphosphogly eerie acid is a

A) priming reaction only

B) redox reaction only

C) priming and redox reaction only

D) substrate level phosphorylation reaction.

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• question_answer105) An eukaryotic cell can synthesise only 38 ATP instead of 40 ATP if the protons of cytosolic NADH-HhT are transported into mitochondrial matrix by

A) malate - aspartate shuttle

B) glycerol phosphate shuttle

C) ATPase

D) permease.

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• question_answer106) The membrane surrounding the vacuole is known as

A) cell membrane

B) plasmalemma

C) tonoplast

D) chromoplast.

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• question_answer107) The largest cell organelles in the cell are

A) plastids

B) golgi bodies

C) mitochondria

D) chromosomes.

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• question_answer108) The organelles for photorespiration are

A) lysosomes

B) glyoxysomes

C) peroxisomes

D) ribosome.

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• question_answer109) The active transport of substances across the plasma membrane is done with the help of

A) diffusion

B) metabolic energy

C) electrochemical gradient

D) both [b] & [c].

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• question_answer110) Molecules moves inside and outside of living cells by

A) osmosis only

B) diffusion only

C) osmosis and diffusion

D) none of the above.

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• question_answer111) Deforestation has caused

A) more floods and increase of temperature

B) more drought and decrease of temperature

C) shortage of food products

D) soil erosion and loss of wild life.

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• question_answer112) Which of the following plant is an endangered species in India?

A) Lycopodium sp.

B) Pinus roxburghii

C) Hydrilla

D) Cerdus deodar a.

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• question_answer113) The region of earth comprising water forms

A) hydrosphere

B) lithosphere

C) biosphere

D) none of these.

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• question_answer114) Which one of the following is the food chain operating in ponds, lakes or sea?

A) grass$\to$insects$\to$frog$\to$birds

B) $\underset{\begin{smallmatrix} (phytopi- \\ anktons) \end{smallmatrix}}{\mathop{algae}}\,\to \underset{(zooplanktons)}{\mathop{small\text{ }animals}}\,\to fish\to big\text{ }fish$

C) grass$\to$dear$\to$lion

D) none of the above.

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• question_answer115) Reserve food in the form of floridean starch and the soluble sugar-floridoside is found in

A) phaeophyta

B) chlorophyta

C) cyanophyta

D) rhodophyta.

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• question_answer116) A plant showing vascular tissue but not producing seed belongs to

A) gymnosperms

B) pteridophytes

C) bryophytes

D) angiosperms.

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• question_answer117) Mutualistic symbiosis of a fungus with the roots of a higher plant is termed as

A) protists

B) mycorrhiza

C) lichens

D) moulds.

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• question_answer118) Which of the following fungi is heteroecious?

A) Ustilago

B) Puccinia

C) Albugo

D) Phytophthora.

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• question_answer119) Citric acid is produced by fermentation of cane molasses (sucrose) by

A) Penicillium notanum

B) Rhizopus spp

C) Aspergillus niger

D) Mucor spp.

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• question_answer120) Gemini viruses are plant viruses with

A) circular single stranded RNA

B) circular single stranded DNA

C) linear single stranded DNA

D) linear single stranded RNA.

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• question_answer121) Of the total potential energy of glucose only about 15% is conserved as the potential energy of ATP and about 50% is lost as heat during alcoholic fermentation. The remaining energy is accounted for by the

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

B) NADH produced

C) growth and reproduction of yeast cells

D) none of the above.

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• question_answer122) Chlorophyll solution appears green in transmitted light but in reflected light it appears red because

A) of phenomenon of fluorescence

B) it reflect red light

C) both of the above

D) none of the above.

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• question_answer123) Casparian strips are characteristic of

A) cortex

B) epidermis

C) pith

D) endodermis.

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• question_answer124) Secondary phloem remains functional generally

A) for one year

B) for less than one year

C) for many year

D) as long as the plant is alive.

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• question_answer125) Intergeneric crosses are rarely successful under natural condition. Which of the following methods may be beneficial in this regard?

A) embryo culture

B) tissue culture

C) anther culture

D) protoplast culture.

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• question_answer126) During megasporogenesis after first phase of meiosis the micropylar dyad cell degenerates while the chalazal one undergoes 2nd phase or meiosis producing 2 megaspores which take part in the development of female gametophyte. This type of female gametophyte development is known as

A) Adoxa type

B) Allium type

C) Endymion type

D) Oenothera type.

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• question_answer127) The cell organelle which is found between the cell wall and cell membrane is

A) lysosome

B) microsome

C) lomasome

D) middle lamella.

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• question_answer128) Pollution is an unavoidable consequence of

A) industrialisation

B) population

C) urbanisation

D) deforestation.

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• question_answer129) Which of the following is a chlorofluorocarbon?

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

B) $C{{F}_{2}}C{{l}_{2}}$

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

D) $Cl{{F}_{2}}C$

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• question_answer130) The ratio 1 1 1 1 is expected as a result of

A) monohybrid cross

B) monohybrid back cross

C) dihybrid cross

D) dihybrid test cross.

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• question_answer131) During RNA transcription, unwinding of DNA is performed by

A) topoisomerase

B) helicase

C) RNA polymerase

D) ligase.

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• question_answer132) Macroelements must generally be present in the plant tissues in concentration of at least

A) 0.001 mg/g dry matter

B) 0.01 mg/g dry matter

C) 0.1 mg/g dry matter

D) 1.0 mg/g dry matter.

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• question_answer133) Uptake of mineral ions against concentration gradient is called

A) active absorption

B) passive absorption

C) negative absorption

D) none of these.

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• question_answer134) Dahlia and Asparagus possess

A) stilt roots

B) fusiform roots

C) tuberous roots

D) fasciculated roots.

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• question_answer135) The first electron acceptor in cyclic photo- phosphorylation is

A) $Fd$

B) $PQ$

C) $PC$

D) Cyt.b.

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• question_answer136) Cuticle is

A) acellular layer on epidermis, which is visible and found in most organ

B) acellular layer on epidermis which is visible or invisible, found in all organs

C) acellular layer on epidermis of dead cells

D) a layer on epidermis which is dead and visible or invisible.

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• question_answer137) Where as chlorosis is produced in leaves due to deficiency of$Fe,Mg,Mn,N$or S. Of these essential element those that are exclusive constituents of chlorophyll molecules are

A) Fe and S

B) N and S

C) Mg and S

D) Mg and N.

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• question_answer138) P700 is named because

A) it is 700 times more efficient than other pigment molecules

B) its absorption and action spectra show peaks at 700nm

C) it is rendered ineffective at wave length above 700nm

D) it is a unit consisting of 700 chorophyll molecules.

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• question_answer139) Two enzymes common to EMP pathway and ${{C}_{3}}$cycle are

A) aldolase and triose phosphate isomerase

B) aldolase and enolase

C) cytochrome oxidase and enolase

D) phosphoglyceromutase and triose phosphate isomerase.

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• question_answer140) The quickest method of plant breeding is

A) introduction

B) selection

C) hybridization

D) mutation breeding

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• question_answer141) Mutation in which thymine is replaced by cytosine is called

A) transition

B) transversion

C) missense

D) none of these.

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• question_answer142) Which of the following organelle is related with genetic engineering?

A) plastids

B) plasmids

C) mitochondria

D) ribosomes.

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• question_answer143) Basic elements of life are

A) $C,H,O,N$

B) $C,P,H,S$

C) $H,O,N,S$

D) $P,C,O,N$

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• question_answer144) Discovery of fossils of cyanobacteria indicates that life originated sometime

A) prior to 4600 million years ago

B) between 4600 and 3600 million years ago

C) more than 3600 million years ago

D) during some other period.

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• question_answer145) The shape of the chromosomes is usually observed at

A) metaphase 1 of the meiosis

B) anaphase 1 of meiosis

C) metaphase of mitosis

D) anaphase of mitosis.

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• question_answer146) The small segment of DNA which helps to detect the presence of a gene or a long DNA sequence in biological system is termed as

A) DNA walker

B) $cDNA$

C) DNA clone

D) DNA probe.

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• question_answer147) When one gene dominates the other non-allelic gene, the phenomenon is known as

A) dominance

B) tolerance

C) homeostasis

D) epistasis

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• question_answer148) The distance between two nucleotides in DNA is

A) $34\text{ }{{A}^{o}}$

B) $3.4\text{ }{{A}^{o}}$

C) $0.34\text{ }{{A}^{o}}$

D) $\text{20 }{{A}^{o}}$

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• question_answer149) The start signal in mRNA for protein synthesis is

A) AUG

B) UAG

C) GUA

D) UGA.

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• question_answer150) Glycolysis consists of

A) ten enzymatic reactions that convert a six- carbon molecule of four-carbon pyruvate and result in a net gain of 4 ATP molecules

B) eight enzymatic reactions that convert a six-carbon molecule to four-carbon pyruvate and result in a net gain of 4 ATP molecules

C) ten enzymatic reactions that convert a six- carbon molecules to three-carbon pyruvate and result in a net gain of 4 ATP molecules

D) eight enzymatic reactions that convert a six- carbon molecules to three-carbon pyruvate and result in a net gain of 2 ATP molecules.

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• question_answer151) One mole of ATP on hydrolysis yield energy equivalent to

A) 7k cal

B) 12 k cal

C) 24k cal

D) 36 k cal.

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• question_answer152) The two main vectors used in genetic engineering to carry genes into bacteria are

A) plasmids and bacteriophages

B) plastids and plasmids

C) plastids and bacteriophages

D) plasmids and phasmids.

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• question_answer153) If father has blood group A and mother has blood group$O$then which one of the following blood groups may be found in their son?

A) B

B) AB

C) $O$

D) B, AB or$O$.

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• question_answer154) Abnormal cell with random number of chromosomes is

A) aneuploid

B) polyploid

C) heterokaryotic

D) haploid.

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• question_answer155) A drug called colchicine is shown to interfere specially with spindle microtubule formation during mitosis. This would result to

A) dehydration of chromosomes

B) despiralization of chromosomes

C) arrest of chromosomes movements

D) arrest of centrioles movements.

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• question_answer156) Estimates place current fish production in India at about

A) 2.85 million metric tonnes

B) 3.00 million metric tonnes

C) 3.75 million metric tonnes

D) 4.78 million metric tonnes.

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• question_answer157) Which is not true in muscle contraction?

A) actin and myosin make actomyosin

B) phosphate reserve comes from CPK

C) chemical energy is converted into mechanical energy

D) mechanical energy is converted into chemical energy.

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• question_answer158) How many mitotic divisions are needed for a single cell to make 256 cells?

A) 8

B) 16

C) 32

D) 64

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• question_answer159) X-chromosomes of female in a sex-linked inheritance case can be passed on to

A) only female progeny

B) only male progeny

C) only in grand daughter

D) male and female progeny.

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• question_answer160) Water soluble droplets of fatty acids, phospholipids and bile salts are

A) P-lipoprotein

B) chylomicrons

C) micelle

D) triglycerides.

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• question_answer161) What is the end product of glycolysis of a glucose molecule?

A) fructose 1,6- diphosphate

B) pyruvate and ATP

C) phosphoglyceraldehyde

D) lactic acid and ATP.

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• question_answer162) Hybridoma is biotechnique which involves fusion of

A) B-cell withT-cell

B) T-cell with spleen cell

C) spleen cell with myeloma cell

D) myeloma cell with B-cell.

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• question_answer163) Salivary gland is

A) compound alveolar

B) compound tubular

C) alveolar

D) tubular.

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• question_answer164) In vertebrates the nerve growth factor occurs in the

A) salivary secretions

B) gastric secretions

C) pancreatic secretion

D) lacrymal secretion.

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• question_answer165) The titin filaments bind the

A) thin filaments to Z line

B) thick filaments to Z line

C) thin filaments to thick filaments

D) thick filaments to M line.

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• question_answer166) Serum differs from plasma in having

A) excess of fibrinogen

B) absence of fibrinogen

C) excess of haemocyanin

D) absence of haemoglobin.

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• question_answer167) The spread of cancer cells from one part of the body to the another part is known as

A) homeostasis

B) metastasis

C) metapophysis

D) metaplasia.

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• question_answer168) Sensitive technique used for the diagnosis of AIDS is

A) ELISA

B) northern blot

C) southern blot

D) immunodiffusion.

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• question_answer169) Downs syndrome is basically a

A) physiological abnormality

B) neurological abnormality

C) sex-linked abnormality

D) autosomal abnormality.

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• question_answer170) Enzyme-catalysed reaction can take place as physiological temperatures because they

A) are proteins

B) have active sites

C) lower the activation energy

D) are heat labile.

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• question_answer171) Michaelis constant (km) of an enzyme is substrate concentration at which the reaction attains

A) its maximum velocity

B) half its maximum velocity

C) double its maximum velocity

D) its normal velocity

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• question_answer172) During stress, besides epinephrine and norepinephrine which other hormones are also released?

A) thyroxine, cortisol, aldosterone and vasopressin

B) cortisol, aldosterone, vasopressin and glucagons

C) cortisol, vasopressin, insulin and parathormone

D) parathormone, vasopressin, glucagon and thyroxine.

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• question_answer173) Nerve gas affect neuromuscular activity by

A) blocking the acetylcholine receptor sites

B) inhibiting the release of acetylcholine

C) inhibiting acetylcholinesterase

D) enchancing the release of acetylcholine.

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• question_answer174) Formation of which of the following requires maximum ATP?

A) urea

B) ammonia

C) uric acid

D) trimethylamine oxide.

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• question_answer175) As compared to a sphere of similar diameter, biconcave erythrocytes have a

A) 20-30% greater surface area to volume ratio

B) 50-60% greater surface area to volume ratio

C) 20-30% smaller surface area to volume ratio

D) 50-60% smaller surface area to volume ratio.

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• question_answer176) Which of the following factors activates platelet adhesion to damaged blood vessel?

A) Hagemanns factor

B) platelet factor IV

C) Von Willebrand factor

D) tissue factor.

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• question_answer177) The enzyme which acts on protein in alkaline medium is

A) pepsin

B) renin

C) trypsin

D) all of these.

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• question_answer178) Absorption of toxic amounts of iron due to a genetically defective control mechanisms is known as

A) haematochromatosis

B) haemosiderosis

C) haemoptysis

D) haematoma.

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• question_answer179) The cranial nerve which supplies internal viscera is

A) trigeminal

B) trochlear

C) vagus

D) auditory.

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• question_answer180) Name the bacterium that helps in nitrogen fixation during anaerobic condition?

A) Azotobacter

B) Pseudomonas

C) Clostridium

D) Nitrosomonas.

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• question_answer181) Retrogressive metamorphosis occurs in

A) Amphioxus

B) Herdmania

C) Nereis

D) none of these.

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• question_answer182) Respiration in Peripatus is by

A) trachea

B) book lungs

C) general body surface

D) lungs.

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• question_answer183) Choose the odd statement for RNA.

A) sugar moiety is ribose

B) uracil replaces thymine

C) single stranded

D) exclusive to viruses.

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• question_answer184) When purine substituted by pyrimidine, the resulting mutation is

A) transition mutation

B) transversion mutation

C) point mutation

D) suppressive mutation

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• question_answer185) Inside a cell, the respiratory enzyme are contained in

A) lysosomes

B) ribosomes

C) acrosomes

D) none of these.

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• question_answer186) The protein synthesizing system is associated with

A) ribosomes

B) microtubules

C) episomes

D) mitochondrial membrane.

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• question_answer187) Non-essential amino-acids combination is

A) valine, leucine, glycine, alanine

B) glycine, serine, proline, glutamic acid

C) proline, aspartic acid, glutamic acid, methionine

D) cysteine, tyrosine, alanine, isoleucine.

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• question_answer188) The first self-duplicating units proposed have been synthesized in the primitive oceans are

A) enzymes

B) genes

C) proteins

D) viruses.

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• question_answer189) Animal cell in which centrosome is not present is of

A) Amoeba

B) Paramecium

C) Trypanosoma

D) Plasmodium.

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• question_answer190) The interphase nuclei of a person are showing two sex chromatins/nucleus. The possible genotype of the person is

A) $44+xxy$

B) $44+xyy$

C) $44+xxx$

D) $44+xxyy.$

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• question_answer191) Which of the following viruses cause common cold?

A) adenovirus

B) simian virus 40

C) T4 virus

D) MSZ virus.

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• question_answer192) The fate of a hormone bound to the specific receptors on the cell surface can be traced through

A) X-ray

B) laser photo-bleaching

C) ultra-scanning

D) resonance imaging.

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• question_answer193) Technique to know the sex, congenital diseases and metabolic disorders is known as

A) amniocentesis

B) castration

C) ovariectomy

D) none of these.

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• question_answer194) Spiders belong to

A) mandibulata

B) chelicerata

C) trilobata

D) none of these.

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• question_answer195) The communities of primary succession are called as

A) sub sere

B) meso sere

C) pioneer sere

D) none of these.

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• question_answer196) Which is not a fossil?

A) brachiopod

B) coprolite

C) Etirepterids

D) Balanoglossus.

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• question_answer197) The phenotypic variation is restricted to certain clear cut characteristics. This variation is commonly known as

A) qualitative inheritance

B) quantitative inheritance

C) polygenic inheritance

D) complex inheritance.

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• question_answer198) The nature of photosynthesis in blue-green algae is

A) oxygenic

B) anoxygenic

C) anaerobic

D) none of these.

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• question_answer199) To control the stored grain pests the better and safe method is

A) the use of chemical pesticides in small amounts

B) the use of less toxic pesticides

C) the biological control of pests

D) fumigation.

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• question_answer200) Movement of stomatal opening and closing and opening of Oxalis flower share the common feature that both are

A) photonastic

B) thigmonastic

C) seismonastic

D) thermonastic.

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