# Solved papers for BCECE Medical BCECE Medical Solved Papers-2015

### done BCECE Medical Solved Papers-2015

• question_answer1) A ball is thrown from the ground to clear a wall 3 m high at a distance of 6 m and falls 18 m away from the wall, the angle of projection of ball is

A) ${{\tan }^{-1}}\left( \frac{3}{2} \right)$

B) ${{\tan }^{-1}}\left( \frac{2}{3} \right)$

C) ${{\tan }^{-1}}\left( \frac{1}{2} \right)$

D) ${{\tan }^{-1}}\left( \frac{3}{4} \right)$

• question_answer2) Consider if the electric flux entering and leaving an enclosed surface respectively are ${{\phi }_{1}}$ and ${{\phi }_{2}}$, the electric charge inside the surface will be

A) ${{\varepsilon }_{0}}({{\phi }_{1}}+{{\phi }_{2}})$

B) $\frac{{{\phi }_{2}}+{{\phi }_{1}}}{{{\varepsilon }_{0}}}$

C) $\frac{{{\phi }_{1}}-{{\phi }_{2}}}{{{\varepsilon }_{0}}}$

D) $\frac{{{\phi }_{1}}+{{\phi }_{2}}}{{{\varepsilon }_{0}}}$

• question_answer3) If the escape speed of a projectile on Earths surface is 11.2 $km{{s}^{-1}}$ and a body is projected out with thrice this speed, then determine the speed of the body far away from the Earth.

A) 56.63 $km{{s}^{-1}}$

B) 33 $km{{s}^{-1}}$

C) 39 $km{{s}^{-1}}$

D) 31.7 $km{{s}^{-1}}$

• question_answer4) Determine the potential drop between the points A and C in the following circuit. Resistances $1\,\,\Omega$ and $2\,\,\Omega$ are representing the internal resistances of the respective cells.

A) $\frac{4}{5}V$

B) 1.75 V

C) 2.25 V

D) 5 V

• question_answer5) A tank is filled with a liquid upto a height H. A small hole is made at the bottom of this tank. Consider ${{t}_{1}}$ be the time taken to empty first half of the tank and ${{t}_{2}}$ be the time taken to empty rest half of the tank. Then, determine the ratio $\frac{{{t}_{1}}}{{{t}_{2}}}$.

A) 1.33

B) 1.5

C) 2

D) 0.414

• question_answer6) An electron and a proton enter a magnetic field perpendicularly both have same kinetic energy. Which of the following statements are true?

A) Trajectory of proton is less curved

B) Trajectory of electron is less curved

C) Both trajectories are equally curved

D) Both move on straight line path

• question_answer7) The coefficient of volume expansion of glycerine is $49\times {{10}^{-5}}{{K}^{-1}}$. What is the fractional change in its density for a ${{30}^{o}}C$ rise in temperature?

A) $1.5\times {{10}^{-2}}$

B) $2\times {{10}^{-4}}$

C) $3.5\times {{10}^{-3}}$

D) $2.5\times {{10}^{-2}}$

• question_answer8) If a conducting rod of length 4 $l$ is rotated about at point O in a uniform magnetzic field B directed into the paper and $DE=l,\,EA=3l$, then

A) ${{v}_{A}}-{{v}_{E}}=\frac{9}{2}B\omega \,{{i}^{2}}$

B) ${{v}_{E}}-{{v}_{A}}=\frac{9}{2}B\omega \,{{i}^{2}}$

C) ${{v}_{D}}-{{v}_{E}}=\frac{B\omega \,{{i}^{2}}}{2}$

D) ${{v}_{A}}-{{v}_{E}}=4B\omega \,{{i}^{2}}$

• question_answer9) An open organ pipe has a fundamental frequency of 300 Hz. The first overtone of a closed organ pipe has the same frequency as the first overtone of organ pipe. How long is each pipe?

A) 41.25 cm

B) 42.3 cm

C) 49.5 cm

D) 40.5 cm

• question_answer10) In L-C-R circuit, $f=\frac{50}{\pi }\,Hz$, V = 50 V, R = 300 $\Omega$ If L = 1 H and C = 20 $\mu C$, then the voltage across capacitor is

A) 50V

B) 20V

C) zero

D) 30 V

• question_answer11) In a car race, car A takes a time t less than car B at the finish and passes the finishing point with speed v more than that of the car B. Assuming that both the cars starts from rest and travel with constant accelerations ${{a}_{1}}$ and ${{a}_{2}}$ respectively. So, the value of v will be

A) $(\sqrt{{{a}_{1}}/{{a}_{2}}}\,)t$

B) $(\sqrt{{{a}_{2}}/{{a}_{1}}})\,t$

C) $({{a}_{1}}\sqrt{{{a}^{2}}})\,t$

D) $(\sqrt{{{a}_{1}}{{a}_{2}}})\,t$

• question_answer12) If an equiconvex lens is cut into two halves along (i) XOX and (ii) YOY as shown in the figure. Let $f,f,f$ be the focal lengths of complete lens of each, in case (i) and of each half in case (ii) respectively. Choose the correct statement from the following?

A) $f=f,\,f=f$

B) $f=2f,\,f=2f$

C) $f=f,\,f=2f$

D) $f=2f,\,f=f$

• question_answer13) The bob of a pendulum is released from < horizontal position A as shown in the figure If the length of the pendulum is 1.5 m, what is the speed with which the bob arrives at the lower most point B, given that it dissipated 5% of its initial energy against air resistance?

A) 5 m/s

B) 5-5 m/s

C) 5.3 m/s

D) 4.4 m/s

• question_answer14) In a photoemissive cell with executing wavelength $\lambda$, the fastest electron has speed v. If the exciting wavelength is changed to $\frac{3\lambda }{4}$the speed of fastest emitted electron will be

A) greater than$v{{\left( \frac{4}{3} \right)}^{1/2}}$

B) $v{{\left( \frac{3}{4} \right)}^{1/2}}$

C) $v{{\left( \frac{4}{3} \right)}^{1/2}}$

D) less than $v{{\left( \frac{4}{3} \right)}^{1/2}}$

• question_answer15) A ball of mass m moving at a speed v makes a head on collision with an identical ball at rest. The kinetic energy at the balls after the collision is 3/4th of the original. What is the coefficient of restitution?

A) $1/\sqrt{3}$

B) $1/\sqrt{2}$

C) $\sqrt{2}$

D) $\sqrt{3}$

• question_answer16) A radioactive material decays by simultaneous emission of two particles with half-lives 1620 yr and 810 yr respectively. The time in years after which one-fourth of material remains, is

A) 1080 yr

B) 2340 yr

C) 4860 yr

D) 3240 yr

• question_answer17) A cylinder rolls up an inclined plane at an angle of ${{30}^{o}}$. At the bottom of the inclined plane, the centre of mass of the cylinder has speed of 5 m/s. How long will it take to return to the bottom?

A) 2s

B) 3 s

C) 1.5 s

D) 4 s

• question_answer18) The current gain in the common emitter amplifier mode of a transistor is 10. The input impedance is 20 $k\Omega$ and load of resistance is 100 $k\Omega$. The power gain is

A) 300

B) 500

C) 200

D) 100

• question_answer19) What will be the displacement equation of the simple harmonic motion obtained by combining the motions? ${{x}_{1}}=2\,\sin \omega \,t$, ${{x}_{2}}=4\,\sin \left( \omega \,t+\frac{\pi }{6} \right)$ and${{x}_{3}}=6\,\sin \left( \omega \,t+\frac{\pi }{3} \right)$

A) $x=10.25\sin \,(\omega \,t+\phi )$

B) $x=10.25\sin \,(\omega \,t-\phi )$

C) $x=11.25\sin \,(\omega \,t+\phi )$

D) $x=11.25\sin \,(\omega \,t-\phi )$

• question_answer20) An ammeter A reads 2 A and the voltmeter V reads 20 V. The value of resistance R is (assuming finite resistaneces of ammeter and voltmeter)

A) exactly 10 $\Omega$.

B) less than 10 $\Omega$.

C) more than 10 $\Omega$.

D) we cannot definitely say

• question_answer21) A stream of water flowing horizontally with the speed of 15 $m{{s}^{-1}}$ gushes out of a tube of cross-sectional area ${{10}^{-2}}{{m}^{-2}}$ and hits a vertical wall nearby. What is the force exerted on the wall by the impact or water? Assuming it does not rebound.

A) 2250 N

B) 2000 N

C) 1500N

D) 1000N

• question_answer22) Two charges $+6\,\,\mu C$ and $-4\,\,\mu C$ are placed 15 cm apart as shown. At what distances from A to its right, the electrostatic potential is zero?

A) 4, 9, 60

B) 9. 15, 45

C) 20, 30, 40

D) 9, 45, infinity

• question_answer23) A shell of mass 0.020 kg is fired by a gun of mass 100 kg. If the muzzle speed of the shell is 80 $m{{s}^{-1}}$. What is the recoil speed of the gun?

A) 1.6 $cm{{s}^{-1}}$

B) 0.5 $cm{{s}^{-1}}$

C) 2 $cm{{s}^{-1}}$

D) 3 $cm{{s}^{-1}}$

• question_answer24) If $E=100\sin (100\,t)$ volt and $I=100\sin \left( 100\,t+\frac{\pi }{3} \right)mA$ are the instantaneous voltage and current, then the rms values of voltage and current are respectively;

A) 70.7 V, 70.7 mA

B) 60.9 V, 69.3 mA

C) 90.6 V,-141.4 mA

D) 60 V, 70 mA

• question_answer25) If torques of equal magnitudes are applied to a hollow cylinder and a solid sphere both having the same mass and radius. The cylinder is free to rotate about its standard axis of symmetry and the sphere is free to rotate about an axis passing through its centre. Which of the two will acquire a greater angular speed after a given time?

A) ${{\omega }_{1}}>{{\omega }_{2}}$

B) ${{\omega }_{1}}={{\omega }_{2}}$

C) ${{\omega }_{2}}>{{\omega }_{1}}$

D) None of these

• question_answer26) . The threshold frequency for certain metal is$3.3\times {{10}^{14}}Hz$. If light of $8.2\times {{10}^{14}}Hz$ frequency is incident on the metal, then the cut-off voltage of the photoelectric current will be

A) 3V

B) 4V

C) 2V

D) 2.5V

• question_answer27) If two simple pendulums first of bob mass ${{M}_{1}}$and length ${{l}_{1}}$ second of bob mass ${{M}_{2}}$ and length ${{l}_{2}}$. Given ${{M}_{1}}={{M}_{2}}$ and ${{l}_{1}}=2{{l}_{2}}$. If the vibrational energies of both are same, then which of the following is correct?

A) Amplitude of B is smaller than A

B) Amplitude of B is greater than B

C) Amplitude will be same

D) None of the above

• question_answer28) A thin film of soap solution $({{\mu }_{s}}=1.4)$ lies on the top of a glass plate $({{\mu }_{g}}=1.5)$. When visible light is incident almost normal to the plate, two adjacent reflection maxima are observed at two wavelengths 420 nm and 630 nm. The minimum thickness of the soap solution are

A) 420 nm

B) 500 nm

C) 450 nm

D) 490 nm

• question_answer29) An air bubble stats rising from the bottom of a lake. Its diameter is 3.6 mm at the bottom and 4 mm at the surface. The depth of the lake is 250 cm and the temperature at surface is${{40}^{o}}C$. What is the temperature at the bottom of the lake? Given atmpospheric pressure = 76 cm of Hg and $g=980\,\,cm/{{s}^{2}}$.

A) ${{11}^{o}}C$

B) ${{12.36}^{o}}C$

C) ${{13}^{o}}C$

D) ${{10.37}^{o}}C$

• question_answer30) If four atoms of hydrogen combine to form an 2 He atom, then the amount of energy released is

A) 26.7 MeV

B) 25.3 MeV

C) 22 MeV

D) 24.5 MeV

• question_answer31) A simple harmonic wave of amplitude 8 unit travels along positive x-axis. At any given instant of time, for a particle at a distance of 10 cm from the origin, the displacement is + 6 unit and for a particle at a distance of 25 cm from the origin, the displacement is + 4 unit. Calculate the wavelength,

A) 200 cm

B) 230 cm

C) 210 cm

D) 250 cm

• question_answer32) When a battery of emf 8 V with internal resistance $0.5\,\,\Omega$ is charged by a 120 V DC supply using a series resistance of $15.5\,\,\Omega$, then the terminal voltage of the battery is

A) 11.5 V

B) 20 V

C) 21.5 V

D) 12,3 V

• question_answer33) A rigid bar of mass 15 kg is supported symmetrically by three wires each 2 m long. Those at each end are of copper and the middle one is of iron. Determine the ratio of their diameters if each is to have the tension.

A) 12.6 : 2

B) 1.31 : 1

C) 4.65 : 3

D) 2.69 : 4

• question_answer34) Figure given below shows a network of four capacitors of capacitance equal to ${{C}_{1}}=C$, ${{C}_{2}}=2C,\,\,{{C}_{3}}=3C,\,\,{{C}_{4}}=4C$ are connected to a battery. The ratio of charges on ${{C}_{2}}$ and ${{C}_{4}}$ is

A) 7/4

B) 7/22

C) 3/22

D) 4/7

• question_answer35) Two trains A and B of length 400 m each are moving on two parallel tracks with a uniform speed of 72 $km{{h}^{-1}}$m the same direction, with A head of speed B. The driver of B decides to overtake A and accelerates by $1\,m/{{s}^{-2}}$. If after 50 s, the guard of B just brushes past the driver of A, what was the original distance between them?

A) 100 m

B) 1150 m

C) 1300 m

D) 1250 m

• question_answer36) If a fully charged capacitor C with initial charge ${{q}_{0}}$ is connected to a coil of self inductance L at$t=0$. The time at which the energy is stored equally between the electric field and magnetic field is

A) $\pi \sqrt{LC}$

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

C) $\frac{\pi }{2}\sqrt{LC}$

D) $\frac{\pi }{6}\sqrt{LC}$

• question_answer37) A rocket is fired from the Earth towards the Sun. At what distance from the Earths centre, the gravitational force on the rocket is zero? Mass of the Sun $=2\times {{10}^{30}}kg$ and mass of the Earth $=6\times {{10}^{24}}kg$.

A) $2.6\times {{10}^{8}}m$

B) $3.2\times {{10}^{8}}m$

C) $3.9\times {{10}^{9}}m$

D) $2.3\times {{10}^{9}}m$

• question_answer38) In the figure given below, for an angle of incidence ${{45}^{o}}$ at the top surface, what is the minimum refractive index need- to total internal reflection at vertical face?

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

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

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

D) $\sqrt{2}+1$

• question_answer39) A solid cylinder of mass 20 kg rotates about its axis with angular speed 100 rad ${{s}^{-1}}$. The radius of the cylinder is 0.25 m. What is the kinetic energy associated with the rotation of cylinder? What is the magnitude of angular momentum of cylinder about its axis?

A) 62.5 T-s

B) 70.4 T-s

C) 79.6 T-s

D) 60.5 T-s

• question_answer40) A change of 8.0 mA in the emitter current 1} rings a change of 7.9 mA in the correct collector current. The values of a and p are

A) 0.99, 90

B) 0.96, 79

C) 0.97, 99

D) 0.99, 79

• question_answer41) A stone of mass 0.25 kg tied to the end of a string is whirled round in a circle of radius 1.5 m with speed 40 rev/min in a horizontal plane. What is the tension in the string and what is the maximum speed with which the stone can be whirled around, if the string can withstand a maximum tension of 200 N?

A) 6.6 N, 35 $m{{s}^{-1}}$

B) 6 N, 37 $m{{s}^{-1}}$

C) 7.5 N, 46 $m{{s}^{-1}}$

D) 8 N, 38 $m{{s}^{-1}}$

• question_answer42) A straight wire of mass 200 g and length 1.5 m carries a current of 2 A. It is suspended in mid air by a uniform horizontal magnetic field B. The magnitude of B (in tesla) is

A) 0.65

B) 0.55

C) 0.75

D) 0.45

• question_answer43) A U -shaped wire is dipped in a soap solution and removed. The thin soap film formed between the wire and light slider supports a weight of $1.5\times {{10}^{2}}N$. The length of the slider is 30 cm. What is the surface tension of the film?

A) $3\times {{10}^{-3}}N{{m}^{-1}}$

B) $2\times {{10}^{-5}}N{{m}^{-1}}$

C) $4\times {{10}^{-4}}N{{m}^{-1}}$

D) $2.5\times {{10}^{-2}}N{{m}^{-1}}$

• question_answer44) At constant pressure, the ratio of increase in volume of an ideal gas per degree rise in kelvin temperature to its original volume is

A) ${{7}^{2}}$

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

C) ${{T}^{3}}$

D) T

• question_answer45) The length of a magnet is large compared to its width and breadth. The time period of its oscillation in vibration magnetometer is 2 s. The magnet is cut along its length into three equal parts and three parts are then palced on each other with their like poles together. The lime period of this combination will be

A) $\frac{2}{3}s$

B) $\sqrt{\frac{2}{3}}s$

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

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

• question_answer46) A body of mass 1 kg is moving in a vertical. circular path of radius 1 m. The difference between the kinetic energies at its highest and lowest positions is

A) $4\sqrt{5}\,\,J$

B) 20 J

C) 10 J

D) 30 J

• question_answer47) If electrical force between two charges is 200 N and we increase 10% charge on one of the charges and decrease 10% charge on the other, then electrical force between them for the same distance becomes

A) 200 N

B) 202 N

C) 198 N

D) 199 N

• question_answer48) The acceleration due to gravity on the planet is 9 times the acceleration due to gravity on planet B. A man jumps to a height of 2 m on the surface of A. What is the height of jump by the same on the planet B7

A) 6 m

B) 2/3 m

C) 2/9 m

D) 18 m

• question_answer49) In hydrogen atom spectrum, frequency of $2.7\times {{10}^{15}}Hz$ of EM wave is emitted when transmission takes place from 2 to 1. If it- moves from 3 to 1, the frequency emitted will be

A) $3.2\times {{10}^{15}}Hz$

B) $32\times {{10}^{15}}Hz$

C) $1.6\times {{10}^{15}}Hz$

D) $16\times {{10}^{15}}Hz$

• question_answer50) If a ray of light in a denser medium strikes a rarer medium at an angle of incidence 2, the angles of reflection and refraction are respectively r and r. If the reflected and refracted rays are at right angles to each other, the critical angle for the given pair of media is

A) ${{\sin }^{-1}}(\tan r)$

B) ${{\sin }^{-1}}(\tan r)$

C) ${{\tan }^{-1}}(\sin i)$

D) ${{\cot }^{-1}}(\tan i)$

• question_answer51) Consider the following reaction sequence of alkene $C{{H}_{3}}CH=CHC{{H}_{3}}\xrightarrow{{{O}_{3}}}A\xrightarrow[Zn]{{{H}_{2}}O}B$ The product B is

A) $C{{H}_{2}}C{{H}_{2}}COC{{H}_{3}}$

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

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

D) $C{{H}_{3}}C{{H}_{2}}CHO$

• question_answer52) Choose the correct statement about the industrial preparation of hydrogen from water gas $(CO+{{H}_{2}})$,

A) ${{H}_{2}}$ is removed through occlusion with Pd

B) CO and ${{H}_{2}}$ are fractionally separated using differences in their densities

C) CO is removed by absorption in aq. $C{{u}_{2}}C{{l}_{2}}$solution

D) CO is oxidised to $C{{O}_{2}}$ with steam in the presence of a catalyst followed by absorption of $C{{O}_{2}}$ in alkali

• question_answer53) The energy required to excite the electron in the atom from $n=1$ to $n=2$, when the ionization enthalpy of hydrogen atom is $1.312\times {{10}^{6}}J/mol$ will be (in the unit of ${{10}^{5}}$).

A) 8.53

B) 7.51

C) 8.92

D) 9.86

• question_answer54) An ideal mono-atomic gas follows the path ABCD. Then, the work done during the complete cycle is

A) zero

B) $-\frac{1}{2}\,pV$

C) $-pV$

D) $-2\,\,pV$

• question_answer55) From the following which pairs give the faster ${{S}_{N}}2$ reaction?

A)

B)

C)

D)

• question_answer56) The reactivity order of halogenation of alkanes is ${{F}_{2}}>C{{l}_{2}}>B{{r}_{2}}>{{I}_{2}}$. Choose the correct statements.

 I. Lower the activation energy for the chain initiation step, more reactive is the halogen. II. Lower the activation energy for the first chain propagation step, more reactive is the halogen. III. Lower the activation energy for the, second chain propagation step, more reactive is the halogen. IV. More negative is the overall heat of the reaction ($\Delta H_{r}^{o}$ of halogenation of alkane) more reactive is the halogen.

A) I and II

B) I, II and III

C) II and IV

D) II. Ill and IV

• question_answer57) What is the bond angle between $Cl-O-Cl$in$C{{l}_{2}}{{O}_{7}}$?

A) ${{109}^{o}}$

B) ${{119}^{o}}$

C) ${{108}^{o}}25$

D) ${{120}^{o}}$

• question_answer58) The solubility of fluorides of alkali metals in water is

A) LiF > NaF > KF > RbF > CsF

B) CsF > RbF > KF > NaF > LiF

C) LiF > KF > NaF > CsF > RbF

D) CsF > KF > NaF > RbF > LiF

• question_answer59) Which of the following relation is correct for gaseous and reversible reactions?

A) $\frac{{{K}_{C}}}{{{K}_{P}}}={{(RT)}^{\Delta {{n}_{g}}}}$

B) $\frac{{{K}_{p}}}{{{K}_{x}}}={{(p)}^{\Delta {{n}_{g}}}}$

C) $\frac{{{K}_{C}}}{{{K}_{X}}}={{(p)}^{-\Delta {{n}_{g}}}}$

D) $\frac{{{K}_{C}}}{{{K}_{X}}}={{\left( \frac{p}{RT} \right)}^{\Delta {{n}_{g}}}}$

• question_answer60) Consider the following sequence of reactions,

A)

B)

C)

D)

• question_answer61) If the dipole moment of HBr is $2.60\times {{10}^{-30}}Cm$and the interatomic spacing is 1.41 $\overset{o}{\mathop{A}}\,$, then the per cent ionic character of HBr is

A) 16.23%

B) 13.21%

C) 11.50%

D) 15.81%

• question_answer62) Consider the following reaction, $CC{{l}_{3}}CH=C{{H}_{2}}\xrightarrow[{{H}_{2}}O/HOCl]{NaB{{O}_{4}}}$ Product (P) is

A) $CC{{l}_{3}}\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{C}}\,HC{{H}_{2}}Cl$

B) $CC{{l}_{3}}\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{C}}\,H\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{C}}\,{{H}_{2}}$

C) $CC{{l}_{3}}\underset{\begin{smallmatrix} | \\ Cl \end{smallmatrix}}{\mathop{C}}\,H-C{{H}_{2}}OH$

D) $CC{{l}_{3}}\underset{\begin{smallmatrix} | \\ Cl \end{smallmatrix}}{\mathop{C}}\,H-\underset{\begin{smallmatrix} | \\ Cl \end{smallmatrix}}{\mathop{C}}\,{{H}_{2}}$

• question_answer63) Among ${{[Ni{{(CN)}_{4}}]}^{2-}},\,{{[NiC{{l}_{4}}]}^{2-}}$ and $[Ni\,\,{{(CO)}_{4}}]$

A) ${{[NiC{{l}_{4}}]}^{2-}}$ is square planar and ${{[Ni{{(CN)}_{4}}]}^{2-}},\,Ni{{(CO)}_{4}}$ are tetrahedral

B) $Ni\,{{(CO)}_{4}}$ is square planar and ${{[Ni\,{{(CN)}_{4}}]}^{2-}},\,{{[NiC{{l}_{4}}]}^{2-}}$ are tetrahedral

C) ${{[Ni\,{{(CN)}_{4}}]}^{2-}}$ is square planar and $[Ni\,{{(C{{l}_{4}}]}^{2-}},Ni{{(CO)}_{4}}$ are tetrahedral

D) None of the above

• question_answer64) Match the following Column I with Column II.

 Column - I Column - II [a] Acetic acid and methyl formate 1. Ring chain tautomerism [b] Maleic and fumaric acid 2. Functional isomers [c] 3. Geometrical isomers [d] 4. Metamerism

A) A- 2 B-3 C-1 D-4

B) A-2 B-1 C-3 D-4

C) A- 4 B-2 C-1 D- 3

D) A-4 B-1 C-2 D-3

• question_answer65) Beryllium gives a compound X with the following percentage composition: Be-6.1%, N-37.8%, Cl-48%, H-8.1%. Molecular weight of X is $148\,\,g\,mo{{l}^{-1}}$ and that of Be is $9\,\,g\,mo{{l}^{-1}}$. The molecular formula of the compound is

A) $Be{{N}_{4}}C{{l}_{2}}{{H}_{12}}$

B) $Be{{N}_{2}}Cl{{H}_{6}}$

C) $Be{{N}_{4}}C{{l}_{2}}{{H}_{6}}$

D) $Be{{N}_{4}}Cl{{H}_{8}}$

• question_answer66) The increasing dipole moments of the following compounds is

A) I < III < IV < II

B) II = IV < III < I

C) II = I < IV < III

D)  III < I < II < IV

• question_answer67) Compound A undergoes following reactions to form B and C Black coloured solid [A] $\xrightarrow{KN{{O}_{3}}+KOH}$ Green coloured solution [B] Green coloured $\xrightarrow{C{{O}_{2}}}$ Pink solution[C] + [A] Solution [B] [C] decolourised by $F{{e}^{3+}}$ Identify A, B and C respectively

A) $Mn{{O}_{2}},\,KMn{{O}_{4}}$ and ${{K}_{2}}Mn{{O}_{4}}$

B) $Mn{{O}_{2}},\,{{K}_{2}}Mn{{O}_{4}}$ and $KMn{{O}_{4}}$

C) $KMn{{O}_{4}},\,Mn{{O}_{2}}$ and ${{K}_{2}}Mn{{O}_{4}}$

D) $KMn{{O}_{4}},\,{{K}_{2}}Mn{{O}_{4}}$ and $Mn{{O}_{2}}$

• question_answer68) The reaction between nitric oxide (NO) and oxygen to form nitrogen dioxide $(N{{O}_{2}})$ is a key step in photochemical smog formation $2NO(g)+{{O}_{2}}(g)\xrightarrow{{}}2N{{O}_{2}}(g)$ The grams of $N{{O}_{2}}$ are formed by complete by reaction of 1.20 g of NO is

A) 7.2g

B) 2:3 g

C) 1.8g

D) 4.1 g

• question_answer69) $2HC\equiv CH\,\,\xrightarrow[+N{{H}_{4}}Cl]{C{{H}_{2}}C{{l}_{2}}}\,A\,\,\xrightarrow[HCl]{1\,\,mol}\,\,B$ Identify the compounds A and B.

A)

B)

C)

D)

• question_answer70) At ${{80}^{o}}C$, the vapour pressure of pure liquid A is 520 mm Hg and that of pure liquid B is 1000 mm Hg. If a mixture solution of A and B boils at ${{80}^{o}}C$and 1 atm pressure, the amount of A in the mixture is

A) 50 mol per cent

B) 54 mol per cent

C) 32 mol per cent

D) 44 mol per cent

• question_answer71) The correct increasing order of solubility of the sulphates in water is

A) $BeS{{O}_{4}}>MgS{{O}_{4}}>CaS{{O}_{4}}>SrS{{O}_{4}}>BaS{{O}_{4}}$

B) $BeS{{O}_{4}}>SrS{{O}_{4}}>CaS{{O}_{4}}>MgS{{O}_{4}}>BeS{{O}_{4}}$

C) $BeS{{O}_{4}}>CaS{{O}_{4}}>SrS{{O}_{4}}>BeS{{O}_{4}}>MgS{{O}_{4}}$

D) $BaS{{O}_{4}}>SrS{{O}_{4}}>MgS{{O}_{4}}>CaS{{O}_{4}}>BeS{{O}_{4}}$

• question_answer72) Consider the following reaction, $ZnC{{l}_{2}}+NaOH\xrightarrow{{}}\underset{White\text{ }ppt.}{\mathop{B}}\,\xrightarrow{NaOH}\underset{Soluble}{\mathop{C}}\,$ Then, the final product C is

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

B) $Zn{{(OH)}_{2}}$

C) ZnO

D) $ZnS{{O}_{4}}$

• question_answer73) The vapour pressure of pure water is 23.5 mm Hg. Then, the vapour pressure of an aqueous solution which contains 5 mass percent of urea is (Molar mass of urea is 60).

A) 23 mm Hg

B) 18 mm Hg

C) 31 mm Hg

D) 35 mm Hg

• question_answer74) Which of the following organic chloro compound shows stereochemical inversion during a ${{S}_{N}}2$ reaction?

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

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

C) ${{({{C}_{2}}{{H}_{5}})}_{2}}CHCl$

D) $C{{H}_{3}}Cl$

• question_answer75) Consider the following reactions, $C\,(s)+{{O}_{2}}(g)\xrightarrow{{}}C{{O}_{2}}(g),\,\Delta H=-94\,kcal$ $2CO\,(g)+{{O}_{2}}\xrightarrow{{}}2C{{O}_{2}}(g),\,\Delta H=-135.2\,kcal$ Then, the heat of formation of CO (g) is

A) 26.4 kcal

B) -26.4 kcal

C) 41.2 kcal

D) -41.2 kcal

• question_answer76) If the $p{{K}_{a}}$ of a weak acid HA is 4.80 and the$p{{K}_{b}}$ , of a weak base BOH is 4.78. Then, the pH of an aqueous solution of the corresponding salt, BA will be

A) 8.23

B) 9.41

C) 7.01

D) 5.91

• question_answer77) Which one of the following is the correct statement?

A) ${{B}_{3}}{{N}_{3}}{{H}_{6}}$ is known as inorganic benzene

B) Chlorides of both beryllium and aluminium have bridged chloride structure in gas phase

C) Boric acid is a protonic acid

D) Beryllium exhibits coordination number of six

• question_answer78) A nitrogenous substance A is treated with$HN{{O}_{2}}$ and the product formed is further treated with $NaOH$ solution which produces blue colouration. Then, A will be

A) $C{{H}_{3}}C{{H}_{2}}N{{H}_{2}}$

B) ${{(C{{H}_{3}})}_{2}}CHN{{O}_{2}}$

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

D) $C{{H}_{3}}C{{H}_{2}}ONO$

• question_answer79) Argon crystallises in fee arrangement and the density of solid and liquid Ar is $1.59\,\,g/c{{m}^{3}}$ and $1.42\,\,g/c{{m}^{3}}$, respectively. The percentage of empty space in liquid Ar is

A) 34.84%

B) 43.8%

C) 23.4%

D) 21.6%

• question_answer80) Which one of the following is an exothermic reaction?

A) ${{N}_{2}}(g)+{{O}_{2}}(g)+180.8\,kJ\xrightarrow{{}}2NO\,(g)$

B) $C\,(graphite)+2S\,(s)\xrightarrow{{}}C{{S}_{2}}(l)-91.9\,kJ$

C) ${{N}_{2}}\,(g)+3{{H}_{2}}(g)-92\,kJ\xrightarrow{{}}2N{{H}_{3}}(g)$

D) $C\,(g)+{{H}_{2}}O(g)\xrightarrow{{}}CO\,(g)+{{H}_{2}}(g)-131.1\,kJ$

• question_answer81) When 4A of current is passed through a 1.0 L, 0.10 M $F{{e}^{3+}}(aq)$ solution for 1 h, it is partly reduced to Fe(s) and partly of $F{{e}^{2+}}(aq)$. Identify the incorrect statement.

A) 0.10 mole of electrons are required to convert all $F{{e}^{3+}}$ to $F{{e}^{2+}}$

B) 0.025 mol of Fe(s) will be deposited

C) 0.075 mol of iron remains as $F{{e}^{2+}}$

D) 0.050 mol of iron remains as $F{{e}^{2+}}$

• question_answer82) Which of the following statement are correct?

A) $C{{O}_{2}}$ and $Si{{O}_{2}}$ both are gases

B) $C{{O}_{2}}$ is gas and $Si{{O}_{2}}$ is a liquid

C) $C{{O}_{2}}$ is a gas but $Si{{O}_{2}}$ is a solid

D) Carbon and Si both form oxides of similar properties

• question_answer83) Identify the product B of the following reactions

A)

B)

C)

D)

• question_answer84) Given that, $E_{F{{e}^{2+}}/Fe}^{o}=-0.44\,\,V$, $E_{F{{e}^{2+}}/F{{e}^{3+}}}^{o}=-0.77\,\,V$. If $F{{e}^{2+}},F{{e}^{3+}}$ and Fe solid are kept together, then

A) $F{{e}^{3+}}$ decreases

B) $F{{e}^{3+}}$ increases

C) $F{{e}^{2+}}$ decreases

D) $F{{e}^{2+}},F{{e}^{3+}}$ remain unchanged

• question_answer85) Which of the following compound in its anionic form is aromatic?

A)

B)

C)

D)

• question_answer86) In terms of Arrhenius equation, $k=A{{e}^{-{{E}_{a}}RT}}$the temperature dependence of rate constant (k) of a chemical reaction is written. Then, the activation energy $({{E}_{a}})$ of the reaction can be calculated by plotting.

A) $\log \,k\,vs\frac{1}{\log \,T}$

B) $\log \,k\,vs\frac{1}{T}$

C) $k\,vs\,\,T$

D) $k\,vs\,\,\frac{1}{\log \,T}$

• question_answer87) Which one of the following electrolytes is most effective for the coagulation of $Fe{{(OH)}_{3}}$?

A) NaCI

B) $N{{a}_{2}}S{{O}_{4}}$

C) $N{{a}_{3}}P{{O}_{4}}$

D) $A{{s}_{2}}{{S}_{3}}$

• question_answer88) $PhC{{H}_{2}}C{{H}_{3}}\xrightarrow[(ii)\,{{H}_{3}}{{O}^{+}}]{(i)\,Cr{{O}_{2}}C{{l}_{2}}/CC{{l}_{4}}}PhC{{H}_{2}}CHO$ The above reaction is an example of which, name reaction?

A) Rossenmund reduction

B) Birch reduction

C) Mendius reduction

D) Etard reduction

• question_answer89) Which of the following statement is applicable for Tyndall effect?

A) The diameter of the dispersed particle is much smaller than the wavelength of the light used

B) The diameter of the dispersed phase is much smaller than the wavelength of the light used

C) The refractive indices of the dispersed phase and the dispersion medium must be same

D) The refractive indices of the dispersed phase and the dispersion medium must differ greatly in magnitude

• question_answer90) Match the following and choose the correct option.

 Column I Column II A. Ribose 1. Ninhydrin B. Biotin 2. Nucleic acid C. Enzyme 3. Vitamin D. Glycine 4. GIobular protein

A) A-1 B-4 C-2 D- 1

B) A-2 B-3 C-4 D-1

C) A-1 B-2 C-3 D-4

D) A-2 B-3 C-1 D-4

• question_answer91) On reduction of glycolic acid with HI, the product formed is

A) acetic acid

B) iodo acetic acid

C) formic acid

D) None of these

• question_answer92) Consider the following reaction, Identify the product B.

A)

B)

C)

D)

• question_answer93) Arrange the following compounds in the increasing order of their reactivity towards HCN.

 I. Acetaldehyde II. Acetone III. Di-tert-butylketone IV. Methyl-tert-butyl ketone

A) III < II < IV < I

B) II <1 < IV < II

C) IV < III < II < I

D) II < IV < I < III

• question_answer94) The enolic form of acetone contains

A) 10 $\sigma$-bonds, $2\pi$ -bonds and 1 lone pair

B) 9 $\sigma$-bonds, $2\pi$-bonds and 2 lone pairs

C) 8 $\sigma$-bonds, $2\pi$-b0nds and 2 lone pairs

D) 9 $\sigma$-bonds, $2\pi$-bond and 2 lone pairs

• question_answer95) The magnetic moment of ${{M}^{x\,+}}$ (atomic number = 25) is $\sqrt{15}\,BM$. Then, the oxidation number $x$ of M is

A) 3

B) 4

C) 2

D) 1

• question_answer96) When 0.1 M NaOH is titrated with 0.1 M, 20 mL HA till the end point, ${{K}_{a}}(HA)=6\times {{10}^{-6}}$ and degree of dissociation of HA is small as compared to unity. What is the pH of the resulting solution at the end point?

A) 6.23

B) 9.22

C) 7.21

D) 8.95

• question_answer97) Arrange the following in the decreasing order of basic character.

 I. p-toluidine II. N, N-dimethyl-p-toluidine III. p-nitroaniline IV. Aniline

A) II > III > I > IV

B) I > II > III > IV

C) II > I > IV > III

D) IV > III > I > II

• question_answer98) What is the enthalpy of the disproportionation of $MgCl$ if the enthalpy of formation of hypothetical $MgCl$ is $-125\,kJ/mol$ and the $MgC{{l}_{2}}$ is $-642\,kJ/mol$?

A) - 767 kJ/mol

B) 767 kJ/mol

C) -392 kJ/mol

D) 392 kJ/mol

• question_answer99) The decreasing order of reactivity towards electrophilic addition of the following is

 I. $CH=CH$ II. $C{{H}_{2}}=C{{H}_{2}}$ III. ${{H}_{2}}C=CH=Cl$ IV. $H\underset{\begin{smallmatrix} | \\ Cl \end{smallmatrix}}{\mathop{C}}\,=\underset{\begin{smallmatrix} | \\ Cl \end{smallmatrix}}{\mathop{C}}\,H$

A) I > II > 111 > IV

B) ll > 1 > 111 > IV

C) IV > III > I > II

D) IV > III > I! > I

• question_answer100) Given the following bond dissociation enthalpies $(kJ\,\,mo{{l}^{-1}})$. $P\equiv P-490,\,P-P=209,\,N\equiv N-946,N-N-160$Compare the enthalpy changes for the process (i) $2{{P}_{2}}(g)\xrightarrow{{}}{{P}_{4}}(g)$ (ii) $2{{N}_{2}}(g)\xrightarrow{{}}{{N}_{4}}(g)$ Choose the correct option.

A) ${{P}_{4}}$ is feasible but ${{N}_{4}}$is hot feasible

B) ${{P}_{4}}$ is not feasible but ${{N}_{4}}$ is feasible

C) Both ${{P}_{4}}$ and ${{N}_{4}}$ are feasible

D) Both ${{P}_{4}}$ and ${{N}_{4}}$are not feasible

• question_answer101) Stelar tissues like xylem and phloem, etc, arise from which of the following

A) protpderm

B) cambium

C) procambium

D) lateral meristem

• question_answer102) Chlamydomonas and Chlorella, earlier placed in algae within plants (both having cell wall) are now placed together in which new kingdom. Choose the correct option.

A) Fungi

B) Animalia

C) Protista

D) Monera

A) Chordates are bilaterally symmetrical.

B) Notochord is present at some stage of life.

C) Non-segmented, false segmented or true metamerically segmented animals.

D) Gill clefts present at some stage of life.

• question_answer104) Out of the following scientific names given below, identify the option written incorrectly.

A) Mangifera.indica

B) Trypanosoma gambiense

C) Apis indica

D) Leo panther

• question_answer105) The most commonly occurring species of an earthworm in India is

A) Pheretima communissima

B) Eutyphacus

C) Pheretima posthuma

D) Lumbricus

• question_answer106) Which type of ribosomal subunit are found in prokaryotic cells?

A) 80 S (60 S + 40 S)

B) 80 S (30 S + 50 S)

C) 70 S (35 S + 35 S)

D) 70 S (50 S + 30 S)

• question_answer107) Identify the correct statement about the fluid mosaic model of cell membrane.

A) It was proposed by J David Robertson in 1972.

B) Model resembles the iceberg (as proteins) floating in the sea (of phospholipids).

C) Hydrophilic phosphate head of phospholipids face inwards.

D) Hydrocarbon tails face outward.

• question_answer108) If more than one nucleoli are seen in the nucleus of cell. What does it corresponds to?

A) Presence of false nucleoli

B) Absence of true nucleoli

C) Breakage in nucleolus

D) None of the above

• question_answer109) Polytene or salivary gland chromosome (giant chromosomes) were first observed by

A) Du Praw

B) Balbiani

C) Hemming

D) Ruckert

• question_answer110) Synaptonemal complex is a structure of

A) cytokinesis

B) terminalisation

C) chromosomal disfunction

D) chromosomal pairing

A) sphingosine

B) sphingomyelins

C) sphingbphospholipids

D) cerebroside

• question_answer112) Which of the following acts as an isomerase enzyme?

A) Phosphoglucomutase

B) Fumerases

C) Transphosphorylases

D) Nitrate reductase

• question_answer113) Addition of a competitive inhibitor to any reaction mixture will

A) decrease km

B) decrease ${{V}_{\max }}$

C) increase km

D) increase ${{V}_{\max }}$

• question_answer114) The value of water potential for any given solute is always

A) insignificant

B) negative

C) slightly negative

D) positive

• question_answer115) Radioactive $C{{O}_{2}}{{(}^{14}}C{{O}_{2}})$ is added to the suspension of a photosynthesising green algae. Which compound of the following will be labelled first with $^{14}C{{O}_{2}}$?

A) Glucose

B) RuBP

C) GP(PGA)

D) Triose phosphate

• question_answer116) ATP is the most important molecule released during all the respiratory cycles. Which one of the following is true about ATP?

A) ATP is prosthetic part of an enzyme

B) ATP is an enzyme

C) ATP is an organic Jon of an enzyme

D) ATP is a coenzyme

• question_answer117) Morphogenesis inducing hormone used in plant tissue culture is

A) abscisic acid

B) gibberellins

C) cytokinins

D) 2, 4-D

• question_answer118) Specialised phagocytic cells of liver present in sinusoidal wall are

A) macrophages

B) nematocytes

C) kupffer cells

D) oxyntic cells

• question_answer119) Bundle of His comprises a network of

A) nerve fibres distributed throughout ventricles

B) nerve fibres present in ventricles

C) muscle fibres present throughout the heart walls

D) muscle fibres distributed in ventricle wall only

• question_answer120) Trigohe in excretory system is

A) a urine filled cavity within the kidney

B) a muscular sphincter at the neck of the urinary bladder

C) a smooth connective tissue region in the urinary bladder

D) a tunic of the ureter

• question_answer121) A fractured coracoid process would involve the

A) clavicle

B) scapula

C) ulna

• question_answer122) A hormone which also acts as a neurotransmitter is

A) vasopressin

B) epinephrine

C) thyroxine

D) insulin

• question_answer123) In which phase of cell division will you observe the phenomenon of congression?

A) Prophase

B) Metaphase

C) Anaphase

D) Telophase

• question_answer124) A person met with an accident and was diagonsed with memory loss. Choose the correct option for the part of brain injured in the accident.

A) Hippocampus

B) Diencephalon

C) Cerebrum

D) Amygdala

• question_answer125) The inactive form of the gastric enzymes is

A) argentaffin

B) zymogens

C) oxyntic

D) None of these

• question_answer126) Native people of plain areas moves to hilly areas, after a few months will have

A) physically unfit to indulge in high energy games

B) have normal blood (RBC) count with Hb having high binding affinity to ${{O}_{2}}$

C) have increased count of RBC, Hb shows decreased affinity to ${{O}_{2}}$

D) suffer from nausea, fatigue and other symptoms of altitude sickness

• question_answer127) Eggs having yolk sac in their centre and cytoplasm in peripheral layer are called

A) homolecithai

B) meioiecithal

C) centrolecithal

D) telolecithal

• question_answer128) Which of the following is a diploid cell?

A) Spermatid

B) Secondary spermatocyte

C) Spermatogonium

D) Spermatozoa

• question_answer129) Given below are few comments regarding Medical Termination of Pregnancy (MTP). Identify the true statement.

A) Government of India legalised MTP in 1970.

B) MTPs, are considered relatively safe up to 12 weeks of pregnancy.

C) Majority of MTPs are legally performed by qualified doctors to an abort healthy child.

D) Amniocentesis demotivates people to carry on MTP.

• question_answer130) Pasteurs experiment to refute the theory of spontaneous generation was successful spontaneous generation did not occur in his set up because

A) he did not boil the flask for long

B) the S-shaped flask used by Pasteur prevented the contamination of broth by air

C) extreme precautions were used by him to kept his flask covered

D) he used fine muslin cloths to cover his experimental set up

A) Proterospongia

B) Neopilina

C) Archaeopteryx

D) Penpatus

• question_answer132) Dihybrid test-cross results in ratio of

A) 9 : 3 : 3 : 1

B) 1 : 2 : 4 : 1

C) 3 : 1 : 1 :3

D) 1 : 2

• question_answer133) The direct ancestor of living modern man is

A) Cro-magnon man

B) Neanderthal .man

C) Heidelberg man

D) Homo habilis

• question_answer134) To identify the genotype of one of the parents, which cross is most appropriate?

A) Test cross

B) Back cross

C) Either [a] or [b]

D) None of these

• question_answer135) The flow of genetic information is correctly indicated by

A) DNA $\to$mRNA $\to$ RNA $\to$ proteins

B) DNA $\to$ mRNA $\to$ proteins

C) RNA $\to$ DNA $\to$ proteins

D) mRNA $\to$ DNA $\to$ proteins

• question_answer136) Who among the following is not involved in the formation of a eukaryotic transcription initiation complex?

A) Transcription factors

B) SnRNA

C) RNA polymerase-11

D) Promoter

• question_answer137) An individual contracted an allergic substance and started wheezing and sneezing. In response the bodys cell secrete some chemicals against allergens, which among those given below are?

A) Melatonin

B) Histamine

C) Sebum

D) Threonine

• question_answer138) Malignant cancer cells can cross the cellular barriers and spread themselves, causing cancer in any part of the body, this property of cancer cells is

A) contact inhibition

B) metastasis

C) malignancy

• question_answer139) LSD, morphine and bhang are derived from

A) Theobroma, Papaver and Cannabis

B) Claviceps, Papaver and Cannabis

C) Cannabis, Erythroxylon and Theobroma

D) Rauwolfia, Cannabis and Papaver

• question_answer140) Splenic fever occurs in catties, goats, camel and sheep etc., and is caused by

A) Corynebactehum pyogenes

B) Cowpox virus

C) Klebsiella pneumoniae

D) Bacillus anthracis

• question_answer141) Triticale the first man made cereal is a cross between

A) wheat and millet

B) wheat and Sorghum

C) wheat and Brassica

D) wheat and rye

• question_answer142) After an organ transplant operation, a doctor prescribed an immuno suppressant drug to the patient. Which of the following would thus be included in for this purpose?

A) Streptokinase

B) Cyclosporin-A

C) Statins

D) Cephalosporins

• question_answer143) The antisense construct of ACC synthase gene (RNA) was used in production of

A) Bt maize

B) Bt cotton

C) Golden rice

D) Flavr savr (tomato)

• question_answer144) T-DNA, extensively used in genetic engineering procedures in extracted from

A) Bacillus thermus aquaticus

B) Caenorhabditis elegans

C) Agrobacterium tumefaciens

D) Bacillus thuringiensis

• question_answer145) Persistent notochord is the feature of which among the following?

A) Chondrichthyes

B) Cyclostomata

C) Loa loa

D) None of these

• question_answer146) The most productive ecosystem is

A) ocean

B) desert

C) grasslands

D) temperate forests

• question_answer147) Critically Endangered (CR) species are

A) whose last individual has died

B) liable to become extinct if not allowed to realise their full biotic potential

C) those facing an extremely high risk of extinction in immediate future

D) low risk species

• question_answer148) Indias first national park was established in which year and known as?

A) 1970. Hailey National Park

B) 1974, Bandipur National Park

C) 1975, Gir National Park

D) 1935. Jim Corbett National Park

• question_answer149) In which zone of the biosphere, no human activity is permitted?

A) Buffer zone

B) Core zone

C) Manipulation zone

D) All of these

• question_answer150) The thinning of egg shell and their premature breaking is causing a decline in bird population in certain areas. The probable reason for this could be

A) biomagnification of DDT

B) eutrophication by fertilisers

C) excessive use of organic manures

D) faulty calcium metabolism in birds