# Solved papers for JCECE Medical JCECE Medical Solved Paper-2012

### done JCECE Medical Solved Paper-2012

• question_answer1) A monkey of 25 kg is holding a vertical rope. The rope does not break if a body of mass 30 kg is suspended from it, but the rope breaks if the mass of body suspended with the rope exceeds 30 kg. What will be the maximum acceleration with which the monkey can climb up along the rope?$(Take\,g=10m{{s}^{-2}})$

A) $2.0\,m{{s}^{-2}}$

B) $2.5\,m{{s}^{-2}}$

C) $3.0\,m{{s}^{2}}$

D) $4.0\,m{{s}^{-2}}$

• question_answer2) A mass of 10 g moving horizontally with a velocity of $\text{100}\,\text{cm}{{\text{s}}^{-1}}$ strikes a pendulum bob of same mass. The two masses after collision stick together. What will be the maximum height reached by the system now? $(Take\,g=10\,m{{s}^{-2}})$

A) Zero

B) 1.25 cm

C) 2.5 cm

D) 5cm

• question_answer3) The three physical quantities x, y and z have units $g\,c{{m}^{2}}{{s}^{-5}},g\,{{s}^{-1}}$and $cm{{s}^{-2}}$respectively. The relation between x, y and z is

A) $x=y{{z}^{2}}$

B) $x={{y}^{2}}z$

C) ${{y}^{2}}=xz$

D) $z={{x}^{2}}y$

• question_answer4) If a vector A having a magnitude of 8 is added to a vector B which lies along $x-$axis, then the resultant of two vectors lies along y-axis and has magnitude twice that of B. The magnitude of B is

A) $\frac{6}{\sqrt{5}}$

B) $\frac{12}{\sqrt{5}}$

C) $\frac{16}{\sqrt{5}}$

D) $\frac{8}{\sqrt{5}}$

• question_answer5) If the length of potentiometer wire is increased, then the length of the previously obtained balance point will

A) increase

B) decrease

C) remains unchanged

D) becomes two times

• question_answer6) If a steel wire of length $l$ and magnetic moment M is bent into a semicircular arc, then the new magnetic moment is

A) $M\times l$

B) $\frac{M}{l}$

C) $\frac{2M}{\pi }$

D) $M$

• question_answer7) The amplitude and the periodic time of a SHM are 5 cm and 6 s respectively. At a distance of 2.5 cm away from the mean position, the phase will be

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

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

C) $\frac{\pi }{6}$

D) $\frac{5\pi }{12}$

• question_answer8) If all of a sudden the radius of the earth decreases, then which one of the following statements will be true?

A) The angular momentum of the earth will become greater than that of the sun.

B) The periodic time of the earth will increase.

C) The energy and angular momentum will remain constant.

D) The angular velocity of the earth will increase

• question_answer9) If the external torque acting on a system is zero $(i.e.,\,\tau =0),$ then

A) $J=0$

B) $F=0$

C) $\omega =0$

D) $\alpha =0$

• question_answer10) Two point charges $-\text{ }q$and $+\text{ }q/2$ are situated at the origin and the point (a, 0, 0) respectively. The point along the $x-$axis, where the electric field vanishes is

A) $x=\sqrt{2}\,a$

B) $x=\frac{a}{\sqrt{2}}$

C) $x=\frac{\sqrt{2}\,a}{\sqrt{2}-1}$

D) $x=\frac{\sqrt{2a}}{\sqrt{2}+1}$

• question_answer11) When the kinetic energy of an electron is increased, the wavelength of the associated wave will

A) decrease

B) increase

C) remains unchanged

D) None of these

• question_answer12) A current$i$ampere flows along the inner conductor of a coaxial cable and returns along the outer conductor of the cable, then the magnetic induction at any point outside the conductor at a distance r metre from the axis is

A) $\infty$

B) Zero

C) $\frac{{{\mu }_{0}}}{4\pi }\frac{2i}{r}$

D) $\frac{{{\mu }_{0}}}{4\pi }\frac{2\pi i}{r}$

• question_answer13) Two parallel long wires carry currents ${{i}_{1}}$and ${{i}_{2}}$with ${{i}_{1}}>{{i}_{2}}.$When the currents are in the same direction, the magnetic field midway between the wires is $10\,\mu T.$ When the direction of ${{i}_{2}}$ is reversed, it becomes $40\mu T.$Then, ratio of ${{i}_{1}}/{{i}_{2}}$is

A) 3 : 4

B) 5 : 3

C) 7 : 11

D) 11 : 7

• question_answer14) The two coherent sources of equal intensity produce maximum intensity of 100 units at a point. If the intensity of one of the sources is reduced by 36% by reducing its width then the intensity of light at the same point will be

A) 67

B) 81

C) 89

D) 90

• question_answer15) A convex mirror of focal length $f$ forms an image which is $\frac{1}{n}$ times the object. The distance of the object from the mirror is

A) $\left( \frac{n-1}{n} \right)f$

B) $\left( \frac{n+1}{n} \right)f$

C) $(n+1)f$

D) $(n-1)f$

• question_answer16) Consider a hydrogen like atom whose energy in nth excited state is given by ${{E}_{n}}=-\frac{13.6{{Z}^{2}}}{{{n}^{2}}},$ when this excited atom makes a transition from excited state to ground state, most energetic photons have energy ${{E}_{\max }}=52.224\,eV$and least energetic photons have energy ${{E}_{\min }}=1.224\,eV.$ The atomic number of atom is

A) 2

B) 4

C) 5

D) None of the above

• question_answer17) A diode is connected to $\text{220}\,\text{V(rms)}$ AC in series with a capacitor as shown in figure. The voltage across the capacitor is

A) $220\,V$

B) $110\,V$

C) $311.1\,V$

D) $\frac{220}{\sqrt{2}}V$

• question_answer18) A wave travelling along positive $x-$axis is given by $y=A\sin (\omega t-kx).$If it is reflected from a rigid boundary such that 80% amplitude is reflected, then equation of reflected wave is

A) $y=A\sin (\omega t+0.8kx)$

B) $y=-0.8A\sin (\omega t+kx)$

C) $y=A\sin (\omega t+kx)$

D) $y=0.8A\sin (\omega t+kx)$

• question_answer19) An engine approaches a hill with a constant speed. When it is at a distance of 0.9 km, it blows a whistle, whose echo is heard by the driver after 5 s. If speed of sound in air is 330 m/s, the speed of engine is

A) 10 m/s

B) 20 m/s

C) 30 m/s

D) 40 m/s

• question_answer20) The graph between the resistive force F acting on a body and the distance covered by the body is shown in the figure. The mass of the body is 25 kg and initial velocity is 2 m/s. When the distance covered by the body is 4m, its kinetic energy would be

A) $10\,J$

B) $20\,J$

C) $40\,J$

D) $50\,J$

• question_answer21) A body of weight 50 N placed on a horizontal surface is just moved by a force of 28.2 N. The frictional force and normal reaction are

A) $2N,3N$

B) $5N,6N$

C) $10N,15N$

D) $20N,30N$

• question_answer22) On a railway curve, the outside rail is laid higher than the inside one so that resultant force exerted on the wheels of the rail car by the tops of the rails will

A) equilibrate the centripetal force

B) be vertical

C) be decreased

D) have a horizontal inward component

• question_answer23) The mass of the moon is $\frac{1}{81}$ of the earth but the gravitational pull is $\frac{1}{6}$ of the earth. It is due to the fact that

A) the radius of earth is $\frac{9}{\sqrt{6}}$ of the moon

B) the radius of moon is $\frac{81}{6}$ of the earth

C) moon is the satellite of the earth

D) None of the above

• question_answer24) Inertia is that property of a body by virtue of which the body is

A) unable to change by itself the state of uniform motion

B) unable to change by itself the state of rest and of uniform linear motion

C) unable to change by itself the state of rest

D) unable to change by itself the direction of motion

• question_answer25) The radius of two metallic spheres A and B are ${{r}_{1}}$and ${{r}_{2}}$respectively $({{r}_{1}}>{{r}_{2}}).$ They are connected by a thin wire and the system is given a certain charge. The charge will be greater

A) equal on both

B) zero on both

C) on the surface of sphere A

D) on the surface of sphere B

• question_answer26) The temperature gradient in a rod of 0.5 m long is $80{{\,}^{o}}C/m.$ If the temperature of hotter end of the rod is $30{{\,}^{o}}C,$ then the temperature of the cooler end is

A) $0{{\,}^{o}}C$

B) $-10{{\,}^{o}}C$

C) $10{{\,}^{o}}C$

D) $40{{\,}^{o}}C$

• question_answer27) Time period of a block suspended from the upper plate of a parallel plate capacitor by a spring of stiflhess K is T, when block is uncharged. If a charge q is given to the block then, the new time period of oscillation will be

A) T

B) $>\,T$

C) $<\,\,T$

D) $\ge \,\,T$

• question_answer28) In the circuit shown, potential difference between $x$and $y$will be

A) Zero

B) 120 V

C) 60 V

D) 20 V

• question_answer29) A wire of length 1 m is moving at a speed of $2\,m{{s}^{-1}}$ perpendicular to its length in a homogeneous magnetic field of 0.5T. If the ends of the wire are joined to a circuit of resistance $6\Omega ,$ then the rate at which work is being done to keep the wire moving at constant speed is

A) $1\,W$

B) $\frac{1}{3}\,W$

C) $\frac{1}{6}\,W$

D) $\frac{1}{12}\,W$

• question_answer30) The transformation ratio in the step-up transformer is

A) 1

B) greater than one

C) less than one

D) the ratio greater or less than one depends on the other factors.

• question_answer31) The focal length of the objective of a terrestrial telescope is 80 cm and it is adjusted for parallel rays, then its power is 20. If the focal length of erecting lens is 20 cm, then full length of the telescope will be

A) 164 cm

B) 124 cm

C) 100 cm

D) 84 cm

• question_answer32) Unpolarized light falls on two polarizing sheets placed one on top of the other. What must be the angle between the characteristic directions of the sheets if the intensity of the final transmitted light is one-third the maximum intensity of the first transmitted beam

A) ${{15}^{o}}$

B) ${{35}^{o}}$

C) ${{55}^{o}}$

D) ${{75}^{o}}$

• question_answer33) The ratio of two specific heats of gas ${{C}_{p}}/{{C}_{V}}$for argon is 1.6 and for hydrogen is 1.4. If adiabatic elasticity of argon at pressure p is E, then at what pressure the adiabatic elasticity of hydrogen will also be equal to E?

A) p

B) 1.4 p

C) $\frac{7}{8}p$

D) $\frac{8}{7}p$

• question_answer34) The stress-strain curves for three wires of different materials are shown in figure, where P, Q and R are the elastic limits of the wires. He figure shows that

A) elasticity of wire P is maximum

B) elasticity of wire Q is maximum

C) elasticity of wire R is maximum

D) None of the above is true

• question_answer35) A body of density ${{d}_{1}}$is counterpoised by Mg of weights of density ${{d}_{2}}$in air of density d. Then, the true mass of the body is

A) M

B) $\frac{M(1-d/{{d}_{2}})}{(1-d/{{d}_{1}})}$

C) $M\left( 1-\frac{d}{{{d}_{2}}} \right)$

D) $M\left( 1-\frac{d}{{{d}_{1}}} \right)$

• question_answer36) According to kinetic theory of gases, total energy of a gas is equal to

A) potential energy

B) kinetic energy

C) both [a] and [b]

D) None of the above

• question_answer37) A dip needle lies initially in the magnetic meridian when it shows an angle of dip $\theta$ at a place. The dip circle is rotated through an angle $x$in the horizontal plane and then it shows an angle of dip$\theta$. Then, $\frac{\tan \theta }{\tan \theta }$will be

A) $\cos x$

B) $\frac{1}{\cos x}$

C) $\frac{1}{\sin x}$

D) $\frac{1}{\tan x}$

• question_answer38) The rms current in an AC circuit is 2 A. If the wattless current be$\sqrt{3}A,$ what is the power factor of the circuit?

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

B) $\frac{1}{3}$

C) $\frac{1}{\sqrt{3}}$

D) $\frac{1}{\sqrt{2}}$

• question_answer39) An electric bulb rated as 500W - 100V is used in a circuit having 200 V supply. The resistance R that must be put in series with the bulb, so that the bulb draws 500 W is

A) $100\Omega$

B) $50\Omega$

C) $20\Omega$

D) $10\Omega$

• question_answer40) A string of length L and mass M hangs freely from a fixed point. Then, the velocity of transverse waves along the string at a distance $x$from the free end is

A) $gx$

B) $\sqrt{gx}$

C) $gL$

D) $\sqrt{gL}$

• question_answer41) Two equal masses each of 2 kg are suspended from a spring balance as shown in figure. The reading of the spring balance will be

A) Zero

B) 2 kg

C) 4 kg

D) between zero and 2 kg

• question_answer42) A body of mass 2 kg slides down a curve track which is quadrant of a circle of radius 1 m as shown in figure. All the surfaces are frictionless. If the body starts from rest, its speed at the bottom of the track is

A) $2\,m{{s}^{-1}}$

B) $0.5\,m{{s}^{-1}}$

C) $19.6\,m{{s}^{-1}}$

D) $4.43\,m{{s}^{-1}}$

• question_answer43) For the circuit shown in figure,

A) resistance $R=46\Omega$

B) current through $20\Omega$ resistance is 0.1A

C) potential difference across the mi resistance is 2V

D) All of the above are true

• question_answer44) If 10000 V is applied across an X-ray tube, what will be the ratio of de-Broglie wavelength of incident electrons to the shortest wavelength X-ray produced? $\left( \frac{e}{m}\text{for}\,\text{electron}\,=1.8\times {{10}^{11}}C\,k{{g}^{-1}} \right)$

A) 0.1

B) 0.2

C) 0.3

D) 1.0

• question_answer45) A water drop in air reflects the light rays as

A)

B)

C)

D)

• question_answer46) Two capillary tubes of same radius r but of lengths ${{l}_{1}}$and ${{l}_{2}}$ are fitted in parallel to the bottom of a vessel. The pressure head is p. What should be the length of a single tube that can replace the two tubes so that the rate of flow is same as before?

A) ${{l}_{1}}+{{l}_{2}}$

B) $\frac{{{l}_{1}}{{l}_{2}}}{{{l}_{1}}+{{l}_{2}}}$

C) $\frac{1}{{{l}_{1}}+{{l}_{2}}}$

D) $\frac{1}{{{l}_{1}}}+\frac{1}{{{l}_{2}}}$

• question_answer47) An ideal thermometer should have

A) small heat capacity

B) large heat capacity

C) medium heat capacity

D) variable heat capacity

• question_answer48) For the circuit shown in figure, the impedance of the circuit will be

A) $50\Omega$

B) $60\Omega$

C) $90\Omega$

D) $120\Omega$

• question_answer49) An optical fibre communication system works on a wavelength of 1.3 um The number of subscribers if can feed if a channel requires 20 kHz are

A) $1\times {{10}^{5}}$

B) $2.3\times {{10}^{10}}$

C) $1.15\times {{10}^{10}}$

D) None of these

• question_answer50) A system of logic gates is shown in the figure. From the study of truth table it can be found that to produce a high output (1) at R, we must have

A) $X=0,\,Y=1$

B) $X=1,\,Y=1$

C) $X=1,\,Y=0$

D) $X=0,\,Y=0$

• question_answer51) The reagent commonly used to determine hardness of water titrimetrically is

A) oxalic acid

B) disodium salt of EDTA

C) sodium citrate

D) sodium thiosulphate

• question_answer52) In a solid lattice, the cation has left a lattice site and is located at an interstitial position. The lattice defect is

A) interstitial defect

B) vacancy defect

C) Frenkel defect

D) Schottky defect

• question_answer53) The molarity of a solution obtained by mixing 800 m? of 0.5 M HCl with 200 mL of 1 M HCl will be

A) 0.8M

B) 0.6M

C) 0.4 M

D) 0.2M

• question_answer54) A solution of sucrose (molar $\text{mass}=342\,\text{g}\,\text{mo}{{\text{l}}^{-1}}$) has been prepared by dissolving 68.5 g of sucrose in 1000 g of water. The freezing point of solution obtained will be (${{k}_{f}}$for water$=\text{1}\text{.86}\,\text{K}\,\text{kg}\,\text{mo}{{\text{l}}^{-1}}$)

A) $-\text{ }0.570{{\,}^{o}}C$

B) $~-0.372{{\,}^{o}}C$

C) $~-0.520{{\,}^{o}}C$

D) $~+\,0.372{{\,}^{o}}C$

• question_answer55) The standard electrode potential of three metals X, Y and Z are $\text{1}\text{.2 V,}\,\text{+}\,\,\text{0}\text{.5 V}$and $-\text{ 3}\text{.0}\,\text{V}$respectively. The reducing power of these metals will be

A) $X>Y>Z$

B) $~Y>Z>X$

C) $~Y>X>Z$

D) $~Z>X>Y$

• question_answer56) The resistance of 1 N solution of acetic acid is $250\Omega ,$when measured in a cell having a cell constant of $\text{1}\text{.15}\,\text{c}{{\text{m}}^{-1}}.$The equivalent conductance $({{\Omega }^{-1}}c{{m}^{2}}\,\text{equi}{{\text{v}}^{-1}})$ of 1 N acetic acid is

A) 2.3

B) 4.6

C) 9.2

D) 18.4

• question_answer57) The thermal decomposition of a molecule shows first order kinetics. The molecule decomposes 50% in 120 min. How much time it will take to decompose 90%?

A) 300 min

B) 360 min

C) 398.8 min

D) 400 min

• question_answer58) In the respect of the equation, $k=A{{e}^{-Ea/RT}}$in chemical kinetics, which one of the following statement is correct?

A) k is equilibrium constant

C) ${{E}_{{}}}$is activation energy

D) R is Rydberg constant

• question_answer59) What is the name of a phenomenon in which both adsorption and absorption takes places?

A) Chemisorption

B) Physisorption

C) Desorption

D) Sprption

• question_answer60) Colloidal solutions of gold, prepared by different methods are of different colours because of

A) variable valency of gold

B) different concentration of gold particles

C) impurities produced by different methods

D) different diameters of colloidal gold particles

• question_answer61) The most important ore of tin is

A) cassiterite

B) cryolite

C) cerussite

D) None of the above

• question_answer62) Which process of purifications is represented by the following scheme? $\underset{impure}{\mathop{Ti}}\,+2{{I}_{2}}\xrightarrow{250{{\,}^{o}}C}Ti{{I}_{4}}\xrightarrow{1400{{\,}^{o}}C}\underset{Pure}{\mathop{Ti}}\,+2{{I}_{2}}$

A) Cupellation

B) Zone refining

C) van-Arkel process

D) Poling

• question_answer63) If the supply of oxygen is limited, ${{\text{H}}_{\text{2}}}\text{S}$reacts with ${{\text{O}}_{2}}$ to form

A) ${{H}_{2}}O+S{{O}_{3}}$

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

C) ${{H}_{2}}S{{O}_{4}}+S$

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

• question_answer64) Which two of the following salts are used for preparing iodised salt? (i) $KI{{O}_{3}}$ (ii) $KI$ (iii) ${{I}_{2}}$ (iv) $HI$

A) I, II

B) I, III

C) II, IV

D) III, IV

• question_answer65) Ammonia will not form complex with

A) $A{{g}^{2+}}$

B) $P{{b}^{2+}}$

C) $C{{u}^{2+}}$

D) $C{{d}^{2+}}$

• question_answer66) The magnetic moment of a transition metal ion is $\sqrt{15}\,BM.$Therefore, the number of unpaired electrons present in it is

A) 4

B) 1

C) 2

D) 3

• question_answer67) $\text{C}{{\text{e}}^{\text{4+}}}$is stable. This is because

A) half-filled d-orbitals

B) all paired electrons in d-orbitals

C) empty d-orbitals

D) fully filled d-orbitals

• question_answer68) $[Co{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]N{{O}_{2}}$ and$[Co{{(N{{H}_{3}})}_{4}}ClN{{O}_{2}}]Cl$ exhibit which type is isomerism?

A) Geometrical

B) Optical

D) lonisation

• question_answer69) The $\pi -$bonded organometallic compound which has ethene as one of its component is

A) Zeises salt

B) ferrocene

C) dibenzene chromium

D) tetraethyltin

• question_answer70) Alcoholic KOH is used for

A) dehydration

B) dehydrogenation

C) dehydrohalogenation

D) dehalogenation

• question_answer71) Freon used as refrigerant is

A) $C{{F}_{2}}=C{{F}_{2}}$

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

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

D) $C{{F}_{4}}$

• question_answer72) Which of the following reacts fastly with Na?

A) ${{1}^{o}}$alcohol

B) ${{2}^{o}}$alcoholo

C) ${{3}^{o}}$3? alcohol

D) The reactivity of all is equal

• question_answer73) Consider the following reaction $\text{Phenol}\xrightarrow{\text{Zn}\,\text{dust}}X\xrightarrow[\text{anhy}\,\text{AlC}{{\text{l}}_{\text{3}}}]{\text{C}{{\text{H}}_{\text{3}}}\text{cl}}Y$ $\xrightarrow{\text{alk}\,\text{KMn}{{\text{O}}_{\text{4}}}}\text{Z}$ The product Z is

A) toluene

B) benzaldehyde

C) benzoic acid

D) benzene

• question_answer74) The formula of chloral is

A) $CHC{{l}_{3}}$

B) $C{{H}_{2}}ClCHO$

C) $CC{{l}_{3}}CHO$

D) $CHC{{l}_{2}}CHO$

• question_answer75) One of the following named reaction is an example of disproportionation reaction. Identify it

A) Birch reduction

B) Aldol condensation

C) Reimer-Tiemann reaction

D) Cannizaro reaction

• question_answer76) Calcium formate on dry heating yields

A) acetone

B) formaldehyde

C) acetic acid

D) acetaldehyde

• question_answer77) Which amongst the following is the most stable carbocation?

A) $C{{H}_{3}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{+}{\mathop{C}}}\,}}\,-H$

B) $C{{H}_{3}}-\underset{C{{H}_{3}}}{\overset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{|}{\mathop{{{C}^{+}}}}}\,}}}\,$

C) $\overset{+}{\mathop{C}}\,{{H}_{3}}$

D) $C{{H}_{3}}\overset{+}{\mathop{C}}\,{{H}_{2}}$

• question_answer78) At$25{{\,}^{o}}C,$ the dissociation constant of a base, BOH, is $1.0\times {{10}^{-12}}.$The concentration of hydroxyl ions in 0.01 M aqueous solution of the base would be

A) $2.0\times {{10}^{-6}}mol\,{{L}^{-1}}$

B) $1.0\times {{10}^{-5}}mol\,{{L}^{-1}}$

C) $1.0\times {{10}^{-6}}mol\,{{L}^{-1}}$

D) $1.0\times {{10}^{-7}}mol\,{{L}^{-1}}$

• question_answer79) Which one of the following pairs represents stereoisomerism?

A) Chain isomerism and rotational isomerism

B) Structural isomerism and geometric isomerism

C) Linkage isomerism and geometric isomerism

D) Optical isomerism and geometric isomerism

• question_answer80) Aniline in a set of reactions yielded a product. The structure of the product D would be

A) ${{C}_{6}}{{H}_{5}}C{{H}_{2}}N{{H}_{2}}$

B) ${{C}_{6}}{{H}_{5}}NHC{{H}_{2}}C{{H}_{3}}$

C) ${{C}_{6}}{{H}_{5}}NHOH$

D) ${{C}_{6}}{{H}_{5}}C{{H}_{2}}OH$

• question_answer81) The correct order in which the $\text{o}-\text{o}$bond length increases in the following is

A) ${{H}_{2}}{{O}_{2}}<{{O}_{2}}<{{O}_{3}}$

B) ${{O}_{3}}<{{H}_{2}}{{O}_{2}}<{{O}_{2}}$

C) ${{O}_{2}}<{{O}_{3}}<{{H}_{2}}{{O}_{2}}$

D) ${{O}_{2}}<{{H}_{2}}{{O}_{2}}<{{O}_{3}}$

• question_answer82) The mass of carbon anode consumed (giving only carbondioxide) in the production of 270 kg of aluminium metal from bauxite by the Hall process is (Atomic mass Al= 27)

A) 180 kg

B) 270 kg

C) 540 kg

D) 90 kg

• question_answer83) The number of moles of $\text{KMn}{{\text{O}}_{\text{4}}}$reduced by one mole of KI in alkaline medium is

A) one fifth

B) five

C) one

D) two

• question_answer84) Which of the following molecules has trigonal planar geometry?

A) $I{{F}_{3}}$

B) $PC{{l}_{3}}$

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

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

• question_answer85) Which one of the following forms micelles in aqueous solution above certain concentration?

A) Urea

B) Dodecyl trimethyl ammonium chloride

C) Pyridinium chloride

D) Glucose

• question_answer86) A nuclide of an alkaline earth metal undergoes radioactive decay by emission of three $\alpha -$particles in succession. The group of the periodic table to which the resulting daughter element would belong is

A) group 14

B) group 16

C) group 4

D) group 6

• question_answer87) Which of the following pairs of a chemical reaction is certain to result in a spontaneous reaction?

A) Exothermic and decreasing disorder

B) Endothermic and increasing disorder

C) Exothermic and increasing disorder

D) Endothermic and decreasing disorder

• question_answer88) The monomer of the polymer

A)

B) ${{(C{{H}_{3}})}_{2}}C=C{{(C{{H}_{3}})}_{2}}$

C) $C{{H}_{3}}CH=CH.C{{H}_{3}}$

D) $C{{H}_{3}}CH=C{{H}_{2}}$

• question_answer89) The correct sequence of increasing covalent character is represented by

A) $LiCl<NaCl<BeC{{l}_{2}}$

B) $BeC{{l}_{2}}<NaCl<LiCl$

C) $NaCl<LiCl<BeC{{l}_{2}}$

D) $BeC{{l}_{2}}<LiCl<NaCl$

• question_answer90) ${{\text{H}}_{\text{2}}}\text{S}$gas when passed through a solution of cations containing HCT precipitates the cations of second group of qualitative analysis but not those belonging to the fourth group. It is because

A) presence of $\text{HCl}$decreases the sulphide ion concentration

B) presence of$\text{HCl}$ increases the sulphide ion concentration

C) solubility product of group II sulphides is more than that of group IV sulphides

D) sulphides of group IV cations are. Unstable in $\text{HCl}$

• question_answer91) The energy of second Bohr orbit of the hydrogen atom is $-\,328\,\text{kJ}\,\text{mo}{{\text{l}}^{-1}};$ hence the energy of fourth Bohr orbit would be

A) $-\,41\,\text{kJ}\,\text{mo}{{\text{l}}^{-1}}$

B) $-1312\,\text{kJ}\,\text{mo}{{\text{l}}^{-1}}$

C) $-164\,\text{kJ}\,\text{mo}{{\text{l}}^{-1}}$

D) $-82\,\text{kJ}\,\text{mo}{{\text{l}}^{-1}}$

• question_answer92) Equilibrium constants ${{K}_{1}}$and ${{K}_{2}}$for the following equilibria $NO(g)+\frac{1}{2}{{O}_{2}}N{{O}_{2}}(g)$ and $2N{{O}_{2}}(g)2NO(g)+{{O}_{2}}(g)$are related as

A) ${{K}_{2}}=\frac{1}{{{K}_{1}}}$

B) ${{K}_{2}}={{K}_{1}}^{2}$

C) ${{K}_{2}}=\frac{{{K}_{1}}}{2}$

D) ${{K}_{2}}=\frac{1}{={{K}_{1}}^{2}}$

• question_answer93) Names of some compounds are given. Which one is not correct in IUPAC system?

A) $\underset{3-\text{methyl}-2-\text{butanol}}{\mathop{C{{H}_{3}}-\underset{OH}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-C{{H}_{3}}}}\,$

B) $\underset{4-\text{methyl}-2-\text{pentyne}}{\mathop{C{{H}_{3}}-C{{H}_{2}}\equiv C}}\,-CH{{(C{{H}_{3}})}_{2}}$

C) $\underset{2-\text{ethyl}-3-\text{methyl}-\text{but}-1-\text{ene}}{\mathop{C{{H}_{3}}-C{{H}_{2}}-\underset{C{{H}_{2}}}{\mathop{\underset{||}{\mathop{C}}\,}}\,-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-C{{H}_{3}}}}\,$

D) $\underset{3-\text{methyl}-4-\text{ethyl}\,\text{heptane}}{\mathop{C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-\underset{C{{H}_{2}}C{{H}_{3}}}{\mathop{\underset{|}{\mathop{CH-\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,H}}\,}}\,-C{{H}_{2}}C{{H}_{3}}}}\,$

• question_answer94) 10g of hydrogen and 64 g of oxygen were filled in a steel vessel and exploded. Amount to water produced in this reaction will be

A) 3mol

B) 4mol

C) 1 mol

D) 2mol

• question_answer95) Dominance of strong repulsive forces among the molecules of the gas (Z = compressibility factor)

A) depends on Z and indicated by Z= 1

B) depends on Z and indicated by Z > 1

C) depends on Z and indicated by Z < 1

D) is independent of Z

• question_answer96) When glucose reacts with bromine water, the main product is

A) acetic acid

B) saccharic acid

C) glyceraldehyde

D) gluconic acid

• question_answer97) Protein present in hair is

A) albumin

B) globulin

C) keratin

D) chromoprotein

• question_answer98) The hydrolysis of 2-bromo-3-methyl butane by ${{S}_{N}}1$mechanism gives mainly

A) 3-methl-2-butanol

B) 2-methyl-2-butanol

C) 2,2-dimethyl-l-propanol

D) 2 methyl- 1-butanol

• question_answer99) The pH value of an acid is 5 and its concentration is 1 M. What is the value of ${{K}_{a}}$for the acid?

A) ${{10}^{-7}}$

B) ${{10}^{-5}}$

C) ${{10}^{-10}}$

D) ${{10}^{-8}}$

• question_answer100) If 1 mole of an ideal gas expands isothermally at $37{{\,}^{o}}C$from 15 L to 25 L, the maximum work obtained is

A) 12.87 J

B) 6.43 J

C) 8.57 J

D) 2.92 J

• question_answer101) Term New Systematics was given by

A) Julian Huxley

B) Bateson

C) Linnaeus

D) Darwin

• question_answer102) Lysozyme that is present in saliva and tears destroys

A) certain fungi

B) certain types of bacteria

C) all viruses

D) most virus infected cells

• question_answer103) infectious proteins are present in

A) gemini viruses

B) prions

C) viroids

D) satellite viruses

• question_answer104) Two adjacent filaments of Spirogyra affinis each 10 cells participating in reproduction. How many new Spirogyra plants are produced during sexual reproduction?

A) 5

B) 10

C) 20

D) 40

• question_answer105) Which one of the following plants functions as Symbolic nitrogen-fixing plant?

A) Azolla

B) Cycas

C) Moss

D) Marchantia

• question_answer106) Symmetry in Cnidaria is

B) bilateral

C) pentamerous

D) spherical

• question_answer107) The young one of cockroach is called

A) caterpillar

B) nymph

C) fingerling

D) maggot

• question_answer108) Pecten, a comb-like structure is found in the eye of

A) fishes

B) frogs

C) birds

D) mammals

• question_answer109) The inflorescence in Ocimum is

A) cyathium

B) verticillaster

C) hypanthodium

D) raceme

• question_answer110) Drupes are called stony fruits because they have hard

A) epicarp and mesoc

B) mesocarp

C) epicarp

D) endocarp

• question_answer111) Examples for lateral meristems are

A) phellogen and procambium

B) fascicular cambium and procambium

C) procambium and dermatogen

D) fascicular cambium and cork cambium

• question_answer112) The type of tissue lining the nasal passage, bronchioles and fallopian tubes is

A) columnar ciliated epithelium

B) cuboidal epithelium

C) neurosensory epithelium

D) germinal epithelium

• question_answer113) The blood does not clot inside the body because of

A) oxygenation of blood

B) movement of blood

C) Heparin in blood

D) absence of fibrinogen in blood

• question_answer114) The number of mitotic cell divisions required to produce 256 cells from single cell would be

A) 10

B) 12

C) 6

D) 8

• question_answer115) Which of the following radioisotope is not suitable for DNA labelling based studies?

A) ${{H}^{3}}$

B) ${{P}^{32}}$

C) ${{N}^{15}}$

D) ${{S}^{35}}$

• question_answer116) Plasmolysis is the result of

A) exosmosis

B) endosmosis

C) reverse osmosis

D) diffusion

• question_answer117) Which element is required for the germination of pollen grains?

A) Boron

B) Calcium

C) Chlorine

D) Potassium

• question_answer118) The mechanism of ATP formation both in chloroplast and mitochondria is explained by

A) relay pump theory of Godlewski

B) Cholodny-Wents model

C) chemiosmotic theory

D) Munchs mass-flow hypothesis

• question_answer119) All enzymes of TCA cycle are located in the mitochondrial matrix except one, which is located in inner mitochondrial membranes in eukaryotes and in cytpsol in prokaryotes. This enzyme is

A) lactate dehydrogenase

B) isocitrate dehydrogenase

C) malate dehydrogenase

D) succinate dehydrogenase

• question_answer120) Which of the following movements in plants is due to the increased concentration of auxin?

A) Movement of short towards the source of light

B) Nyctinasty

C) Movement of sunflower towards sun

D) All of the above

A) scurvy

B) xerophthalmia

C) bleeding

D) osteomalacja

• question_answer122) Thiamine (vitamin$-{{\text{B}}_{\text{1}}}$) deficiency results in

A) Wernickes syndrome

B) Korsakoffs syndrome

C) osteonecrosis

D) tunnel vision

• question_answer123) Left shift of oxyhaemoglobin curve is noticed under

A) normal temperature and pH

B) low temperature and high pH

C) low pH and high temperature

D) low pH and low temperature

• question_answer124) How many double circulations are normally completed by the human heart, in one minute?

A) Eight

B) Sixteen

C) Seventy two

D) Thirty six

• question_answer125) If Henles loop were absent from mammalian nephron, which of the following is to be expected?

A) The urine will be more concentrated

B) The urine will be more dilute

C) There will be no urine formation

D) There will be hardly any change in the quality and quantity of urine formed

• question_answer126) Matrix of bone is composed of

A) chondrin

B) ossein

C) osteon

D) auxin

• question_answer127) Choose the correct non-protein ammo acid from the given option.

A) Hydroxyproline

B) Hydroxylysine

C) Cystine

• question_answer128) If the pituitary gland of an adult rat is surgically. removed, which of the following endocrine glands will be less affected?

C) Thyroid

• question_answer129) Different colours of frogs skin are controlled by

A) hormones

B) melanocytes

C) nervous system

D) Both [a] and [c]

• question_answer130) Which one of the following pairs of plant structures has haploid number of chromosomes?

A) Megaspore mother cell and antipodal cells

B) Egg cell and antipodal cells

C) Nucellus and antipodal cells.

D) Egg nucleus and secondary nucleus

• question_answer131) Which is present in male rabbit but not present in female rabbit?

A) Urethra

B) Vagina

C) Uterus

D) Vas deferens

• question_answer132) Which one of the following is the most likely reason of not occurring regular menstruation cycle in females?

A) Fertilization of the ovum

B) Maintenance of the hypertrophical endometrial lining

C) Maintenance of high concentration of sex-hormones in the blood stream

D) Retention of well-developed corpus luteum

• question_answer133) Mating of an organisms to a double recessive in order to determine whether it is homozygous or heterozygous for a character under consideration, is called

A) reciprocal cross

B) test cross

C) dihybrid cross

D) back cross

• question_answer134) In which mode of inheritance, do you expect more maternal influence among the off springs?

A) Autosomal

B) Cytoplasmic

• question_answer135) Cri-du-chat syndrome in humans is caused by the

A) fertilization of on XX egg by a normal Y-bearin sperm

B) loss of half of the short arm of chromosome 5.

C) loss of half of the long arm of chromosome 5

D) trisomy of 21st chromosome

• question_answer136) Operon concept was proposed by

A) Jacob and Monod

B) David Baltimore

C) Allec Jeffery

D) None of the above

• question_answer137) Every cell of the body contributes gemmules to the germ cells and so shares in the transmission of inherited characters, this theory is known as

A) theory of inheritance of acquired characters

B) theory germplasm

C) Both [a] and [b]

D) theory of natural selection

• question_answer138) Darwins finches provide an excellent evidence in favour of organic evolution. These are related to which of the following evidences?

A) Embryology

B) Palaeontology (or fossils)

C) Anatomy

D) Biogeography (or geographic distribution)

• question_answer139) How does antigen-determinant differ from antigen binding site?

A) By its structure

B) By its location

C) By its function

D) All of these

A) antigen-antibody Interactions occur

B) high frequency sound waves are used

C) magnetic waves are used

D) None of the above

• question_answer141) Which of the following can be controlled by using biopesticides?

A) Insects

B) Diseases

C) Weeds

D) All of these

• question_answer142) Percentage composition of fibroin and sericin in silk is

A) 50:40

B) 80:20

C) 30:70

D) 40:60

• question_answer143) The niche of a population is defined as

A) set of condition that interacts

B) place where it lives

C) set of conditions and resources it uses

D) geographical area that it covers

• question_answer144) Peacock eats a snake and snake eats frog and frog eats insect, while insect eats green plant, then position of peacock is

A) primary producer

B) secondary producer

C) decomposer

D) top at the apex of food pyramid

• question_answer145) In this soil conservation method, several parts of grasses are left out in soil after the crop is harvested

A) contour farming

B) terrace farming

C) tillage

D) crop rotation

• question_answer146) Which one of the following shows maximum genetic diversity in India?

A) Rice

B) Maize

C) Mango

D) Groundnut

A) it acts as disinfectant

C) ozone is easily available from ${{\text{O}}_{\text{2}}}$

D) All of the above

• question_answer148) Which of the following is absent in polluted water?

A) Hydrilla

B) Water hyacinth

C) Larva of stone fly

D) Blue-green algae

• question_answer149) Which one of the following palindromic base sequence in DNA can be easily cut at about the middle by some particular restriction enzyme?

A) $5-CGTTCG-3$ $3-ATCGTA-5$

B) $5-GATATG-3$ $3-CTACTA-5$

C) $5-GAATTC-3$ $3-CTTAAG-5$

D) $5-CACGTA-3$ $3-CTCAGT-5$

• question_answer150) Which one of the following bacterium is used for production of transgenic plants?

A) Escherichia coli

B) Bacillus thuringiensis

C) Staphylococcus aureus

D) Agrobacterium tumefaciens