# Solved papers for BCECE Medical BCECE Medical Solved Papers-2011

### done BCECE Medical Solved Papers-2011

• question_answer1) Which of the following pairs have identical dimensions?

A) Momentum and force

B) Pressure and surface tension

C) Moment of force and angular momentum

D) Surface tension and surface energy

• question_answer2) A train 100 m long travelling at 40 m/s starts overtaking another train 200 m long travelling at 30 m/s. The time taken by the first train to pass the second train completely is

A) 30s

B) 40s

C) 50s

D) 60s

• question_answer3) A constant power P is applied to a particle of mass m. The distance travelled by the particle when its velocity increases from ${{v}_{1}}$ to ${{v}_{2}}$ is (neglect friction)

A) $\frac{m}{3P}(v_{2}^{3}-v_{1}^{3})$

B) $\frac{m}{3P}({{v}_{2}}-{{v}_{1}})$

C) $4.32\times {{10}^{6}}$

D) $\frac{m}{3P}(v_{2}^{2}-v_{1}^{2})$

• question_answer4) A spring of constant $5\times {{10}^{3}}$ N/m is stretched initially by 5 cm from the unstretched position. Then the work required to stretch it further by another 5 cm is

A) 6.25 Nm

B) 12.5 Nm

C) 18.75 Nm

D) 25.00 Nm

• question_answer5) Four spheres each having mass m and radius rare placed with their centres on the four corners of a square of side a. Then the moment of inertia of the system about an axis along one of the sides of the square is

A) $\frac{8}{5}\,m{{r}^{2}}$

B) $\frac{8}{5}\,m{{r}^{2}}+m{{a}^{2}}$

C) $\frac{8}{5}\,m{{r}^{2}}+2\,\,m{{a}^{2}}$

D) $\frac{4}{5}\,m{{r}^{2}}+4\,\,m{{a}^{2}}$

• question_answer6) If an artificial satellite is moving in a circular orbit around the earth with a speed equal to half the magnitude of the escape velocity from the earth, the height of the satellite above the surface of the earth is

A) 2R

B) R

C) R

D) R

• question_answer7) A 2 kg copper block is heated to ${{500}^{o}}C$ and then it is placed on a large block of ice at ${{0}^{o}}C$. If the specific heat capacity of copper is 400 J/kg/C and latent heat of water is $3.5\times {{10}^{5}}$ J/kg\ The amount of ice that can melt is

A) 7/8 kg

B) 7/5 kg

C) 8/7 kg

D) 5/7 kg

• question_answer8) Number of waves in 8 cm of vacuum is same as number of waves in $x$ cm of a medium. Refractive index of medium is 4/3, then the value $x$ is

A) 32/3 cm

B) 12cm

C) 6 cm

D) 4 cm

• question_answer9) Consider a gas with density p and c as the root mean square velocity of its molecules contained in a volume. If the system moves as whole with velocity v, then the pressure exerted by the gas is

A) $\frac{1}{3}\rho {{\overline{c}}^{2}}$

B) $\frac{1}{3}\rho {{(c+v)}^{2}}$

C) $\frac{1}{3}\rho {{(\overline{c}-v)}^{2}}$

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

• question_answer10) At ${{127}^{o}}C$ radiated energy is $2.7\times {{10}^{-3}}$ J/s. At what temperature radiated energy is $4.32\times {{10}^{6}}$J/s?

A) 400 K

B) 4000 K

C) 80000 K

D) 40000 K

• question_answer11) The minimum phase difference between two simple harmonic oscillations, ${{y}_{1}}=\frac{1}{2}\sin \omega \,t+\frac{\sqrt{3}}{2}\cos \,\omega \,t$ ${{y}_{2}}=\sin \omega \,t+\cos \,\omega \,t$, is

A) $\frac{7\pi }{12}$

B) $\frac{\pi }{12}$

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

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

• question_answer12) A rubber cord catapult has cross-sectional area 25 mm2 and initial length of rubber cord is 10 cm. It is stretched to 5 cm and then released to project a missile of mass 5 g. Taking${{Y}_{ruber}}=5\times {{10}^{8}}N{{m}^{-2}}$, velocity of projected missile is

A) 20 $m{{s}^{-1}}$

B) 100 $m{{s}^{-1}}$

C) 250 $m{{s}^{-1}}$

D) 200 $m{{s}^{-1}}$

• question_answer13) The material of a wire has a density of 1.4 g/$c{{m}^{3}}$. If it is not wetted by a liquid of surface tension 44 dyne/cm, then the maximum radius of the wire which can float on the surface of liquid is

A) $\frac{10}{28}$cm

B) $\frac{10}{14}$cm

C) $\frac{10}{7}$mm

D) 0.7 cm

• question_answer14) Binding energy of satellite is $4\times {{10}^{8}}J$, Its PE is

A) $-4\times {{10}^{8}}J$

B) $-8\times {{10}^{8}}J$

C) $8\times {{10}^{8}}J$

D) $4\times {{10}^{8}}J$

• question_answer15) A current of 0.01 mA passes through the potentiometer wire of a resistivity of ${{10}^{9}}\Omega$ cm and area of cross-section ${{10}^{-2}}\,c{{m}^{2}}$. The potential gradient is

A) ${{10}^{9}}V/m$

B) ${{10}^{11}}V/m$

C) ${{10}^{10}}V/m$

D) ${{10}^{8}}V/m$

• question_answer16) A particle of mass m attached with a string of length I is just revolving on the vertical circle without slacking of the string. If ${{v}_{A}}$, Vg and ${{v}_{D}}$are speeds at positions A, B and D, then

A) ${{v}_{B}}>{{v}_{D}}>{{v}_{A}}$

B) tension in string at D = 3 mg

C) ${{v}_{D}}=\sqrt{3gl}$

D) All of the above

• question_answer17) A bucket of water is being revolved in vertical circle of radius 1 m. Minimum frequency required to prevent the. water from getting down the path is $(g=10\,\,m/{{s}^{2}})$

A) $\frac{2\pi }{\sqrt{10}}$

B) $\frac{2\pi }{\sqrt{5}}$

C) $\frac{\sqrt{10}}{2\pi }$

D) $\frac{\sqrt{5}}{2\pi }$

• question_answer18) A round disc of moment of inertia ${{I}_{2}}$ about its axis perpendicular to its plane and passing through its centre is placed over another disc of moment of inertia ${{l}_{1}}$ rotating with an angular velocity co about the same axis. The final angular velocity of the combination of discs is

A) $\frac{{{I}_{2}}\,\,\omega }{{{I}_{1}}+{{I}_{2}}}$

B) $\omega$

C) $\frac{{{I}_{1}}\,\,\omega }{{{I}_{1}}+{{I}_{2}}}$

D) $\frac{({{I}_{1}}+{{I}_{2}})\,\omega }{{{I}_{1}}}$

• question_answer19) Two discs have same mass and thickness Their materials are of densities ${{\rho }_{1}}$ and ${{\rho }_{2}}$. The ratio of their moment of inertia about central axis will be

A) ${{\rho }_{1}}:{{\rho }_{2}}$

B) ${{\rho }_{1}}:{{\rho }_{2}}:1$

C) $1:{{\rho }_{1}}\,\,{{\rho }_{2}}$

D) ${{\rho }_{2}}:{{\rho }_{1}}$

• question_answer20) A 4 m long wire of resistance $8\,\Omega$ is connected in series with a battery of emf 2 V and a resistor of $7\,\Omega$. The internal resistance of the battery is $1\,\,\Omega$. What is the potential gradient along the wire?

A) 1, 00 $V{{m}^{-1}}$

B) 0,75 $V{{m}^{-1}}$

C) 0.50 $V{{m}^{-1}}$

D) 0.25 $V{{m}^{-1}}$

• question_answer21) A uniform wire of $16\,\,\Omega$ resistance is made into the form of a square. Two opposite corners of the square are connected by a wire of resistance $16\,\,\Omega$. The effective resistance between the other two opposite corners is

A) $32\,\,\Omega$

B) $16\,\,\Omega$

C) $8\,\,\Omega$

D) $4\,\,\Omega$

• question_answer22) A $6\times {{10}^{-4}}F$ parallel plate air capacitor is connected to a 500 V battery. When air is replaced by another dielectric material, $7.5\times {{10}^{-4}}C$ charge flows into the capacitor. The value of the dielectric constant of the material is

A) 1.5

B) 2.0

C) 1.0025

D) 3.5

• question_answer23) The 90 pF capacitor is connected to a 12 V battery. How many electrons are transferred from one plate to another?

A) $1.1\times {{10}^{9}}$

B) $6.7\times {{10}^{9}}$

C) $4\times {{10}^{19}}$

D) $5\times {{10}^{19}}$

• question_answer24) Given mass number of gold =197, Density of gold = 19.7 $g/c{{m}^{3}}$ Avogadros number $=6\times {{10}^{23}}$. The radius of the gold atom is approximately

A) $1.5\times {{10}^{-8}}m$

B) $1.7\times {{10}^{-9}}m$

C) $1.5\times {{10}^{-10}}m$

D) $1.5\times {{10}^{-12}}m$

• question_answer25) In Youngs double slit experiment, two slits are separated by 1 m. The slits are illuminated by a light of wavelength 650 nm. The source of light is placed symmetrically with respect to the two slits. Interference pattern is observed on a screen at a distance of 1 m from the slits. The distance between the third dark fringe and the fifth bright fringe from the centre of the pattern will be

A) 1.62 mm

B) 2.62 mm

C) 5.62 mm

D) 3.62 mm

• question_answer26) R is a radius of a planet and p is its density. The escape velocity on its surface will be

A) ${{R}^{2}}\sqrt{4\pi G\rho /3}$

B) $R\sqrt{4\pi G\rho /3}$

C) ${{R}^{2}}\sqrt{8\pi G\rho /3}$

D) $R\sqrt{8\pi G\rho /3}$

• question_answer27) A satellite is moving in a circular orbit at a certain height above the earths surface. It takes $5.26\times {{10}^{3}}s$ to complete one revolution with a centripetal acceleration equal to 9.32$m/{{s}^{2}}$. The height of satellite orbiting above the earth is (Earths radius $=6.37\times {{10}^{6}}m$)

A) 220 km

B) 160 km

C) 70km

D) 120 km

• question_answer28) The surface tension of soap solution is 0.03 N/m. The amount of work done in forming a bubble of radius 5 cm is

A) 3.77 J

B) 1.885 J

C) $0.95\times {{10}^{-3}}J$

D) $1.9\times {{10}^{-3}}J$

• question_answer29) The minimum velocity of capillary waves on the surface of water is (surface tension of water $=7.2\times {{10}^{-2}}$ N/m)

A) 0.23 m/s

B) 0.46 m/s

C) 0.69 m/s

D) 0.92 m/s

• question_answer30) A wire has a breaking stress of $6\times {{10}^{5}}N/{{m}^{2}}$ and a density of $3\times {{10}^{4}}kg/{{m}^{3}}$. The length of the wire of the same material which will break under its own weight, (if $g=10\,m/{{s}^{2}}$) is

A) 2000m

B) 2500m

C) 20m

D) 2m

• question_answer31) A man measures the period of simple pendulum inside a stationary-lift and finds it to be T second. If the lift accelerates downwards with acceleration of $\frac{g}{4}$, the period of oscillation will be

A) $T\times \frac{\sqrt{3}}{2}\,s$

B) $T\times \frac{2}{\sqrt{3}}\,s$

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

D) $\sqrt{T}\,s$

• question_answer32) A spherical black body with a radius of 12 cm radiates 450 W power at 500 K. If the radius were halved and temperature be doubled, the power radiated in watt would be

A) 1800

B) 900

C) 3600

D) 850

• question_answer33) If the emissive power of black surface at same temperature is 400 $W/{{m}^{2}}$, the emissive and absorptive powers of the surface assuming it was initially ordinary surface, are (Given, Mass of the body m = 4.2 kg, Area of body $=5\times {{10}^{-2}}{{m}^{2}}$, Rate of cooling $\frac{d\theta }{dt}=\frac{1}{12}\times {{10}^{-2}}{{\,}^{o}}C/\min$ Specific heat $s=420J/kg{{\,}^{o}}C$)

A) e = a = 0.0735

B) e = a = 0.0435

C) e = a = 0.0535

D) e = a = 0.0235

• question_answer34) The expression for total kinetic energy per unit volume of gas is

A) $\frac{E}{V}=\frac{p}{2}$

B) $\frac{E}{V}=\frac{1}{3}p$

C) $\frac{E}{V}=\frac{2}{3}p$

D) $\frac{E}{V}=\frac{3}{2}p$

• question_answer35) A vessel contains a mixture of one mole of oxygen and two moles of nitrogen at 300 K. The ratio of the average rotational KE per oxygen molecule that per nitrogen molecule is

A) 1 : 1

B) 1 : 2

C) 2 : 1

D) depends on the moments of inertia of the two molecules

• question_answer36) The wavelength and frequency of beam of light in water of refractive index 4/3 having wavelength 0.48 micron in air are

A) $0.16\times {{10}^{-6}}m,\,\,6.25\times {{10}^{14}}Hz$

B) $0.36\times {{10}^{-6}}m,\,\,6.25\times {{10}^{14}}Hz$

C) $0.36\times {{10}^{-6}}m,\,\,3.25\times {{10}^{14}}Hz$

D) $0.26\times {{10}^{-6}}m,\,\,6.25\times {{10}^{14}}Hz$

• question_answer37) A ray of light is incident on glass slab making an angle of incidence ${{\sin }^{-1}}\left( \frac{\sqrt{3}}{2} \right)$. What will be the angle of refraction in glass of refractive index 1.5?

A) ${{40}^{o}}\,18$

B) ${{24}^{o}}\,49$

C) ${{25}^{o}}\,17$

D) ${{35}^{o}}\,16$

• question_answer38) An electron at rest is accelerated through a potential difference of 200 V. If the electron acquires a velocity $8.4\times {{10}^{6}}$ m/s, the value of e/m of electron is

A) $1.76\times {{10}^{-4}}C/kg$

B) $1.76\times {{10}^{14}}C/kg$

C) $1.76\times {{10}^{11}}C/kg$

D) $1.76\times {{10}^{-16}}C/kg$

• question_answer39) A radio transmitter operates at a frequency of 880 kHz and power of 10 kW. The number of photons emitted per second is

A) $13.27\times {{10}^{4}}$

B) $13.27\times {{10}^{34}}$

C) $1327\times {{10}^{34}}$

D) $1.71\times {{10}^{31}}$

• question_answer40) What is the voltage gain in a common emitter amplifier, when input resistance is $3\,\,\Omega$. and load resistance is $24\,\,\Omega$. with $\beta =60$?

A) 480

B) 2.4

C) 4.8

D) 8.4

• question_answer41) The input resistance of a common emitter transistor amplifier, if the output resistance is$500\,\,k\Omega$, the current gain $\alpha =0.98$ and the power gain is $6.0625\times {{10}^{6}}$, is

A) $198\,\Omega$

B) $300\,\Omega$

C) $100\,\Omega$

D) $400\,\Omega$

• question_answer42) Which of the following transitions in hydrogen atom produces longest wavelength of radiation (or photon of minimum energy)?

A) n = 2, p = 4

B) n = 3, p = 4

C) n = 6, p = 8

D) n = 5, p = 6

• question_answer43) If $\left( \frac{0.51\times {{10}^{-10}}}{4} \right)$m, is the radius of smallest electron orbit in hydrogen like atom, then this atom is

A) H-atom

B) $H{{e}^{+}}$

C) $l{{i}^{2+}}$

D) $B{{e}^{3+}}$

• question_answer44) A series resonant circuit contains $L=\frac{5}{\pi }\,mH$,$C=\frac{200}{\pi }\mu F$ and $R=100\,\,\Omega$. If a source of emf $e=200\sin 100\,\,\pi t$ is applied, then the rms current is

A) 2 A

B) $200\sqrt{2}\,A$

C) $100\sqrt{2}\,A$

D) 1.41 A

• question_answer45) A rod of length 1.0 m is rotated in a plane perpendicular to a uniform magnetic field of induction 0.25 T with a frequency of 12 rev/s. The induced emf across the ends of the rod is

A) 18.89V

B) 3V

C) 15V

D) 9.42V

• question_answer46) A ferromagnetic material is heated above its curie temperature. Which one is a correct statement?

A) Ferromagnetic domains are perfectly arranged

B) Ferromagnetic domains become random

C) Ferromagnetic domains are not influenced

D) Ferromagnetic material changes into diamagnetic material

• question_answer47) A material is placed in a magnetic field and it is thrown out of it. Then the material is

A) paramagnetic

B) diamagnetic

C) ferromagnetic

D) non-magnetic

• question_answer48) A charged particle of mass m and charge q is accelerated through a potential difference of V volt. It enters a region of uniform magnetic field which is directed perpendicular to the direction of mouon of the panicle. The particle will move on a circular path of radius given by

A) $\sqrt{\frac{Vm}{q{{B}^{2}}}}$

B) $\frac{Vm}{q{{B}^{2}}}$

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

D) $\sqrt{\frac{Vm}{q}}\,\,.\,\left( \frac{1}{B} \right)$

• question_answer49) An electron moves at right angle to a magnetic field of $1.5\times {{10}^{-2}}T$ with a speed of $6\times {{10}^{-7}}$m/s. If the specific charge on the electron is $1.7\times {{10}^{11}}$ C/kg, the radius of the circular path will be

A) 2.9 cm

B) 3.9 cm

C) 2.35cm

D) 2cm

• question_answer50) In a circuit, 5 percent of total current passes through a galvanometer. If resistance of the galvanometer is G. Then the value of the shunt is

A) 19 G

B) 20 G

C) $\frac{G}{20}$

D) $\frac{G}{19}$

• question_answer51) Given, C (diamond) $+{{O}_{2}}\xrightarrow{{}}C{{O}_{2}};\Delta H=-395\,kJ$ C (graphite) $+{{O}_{2}}\xrightarrow{{}}C{{O}_{2}};\Delta H=-393\,kJ$ The heat of formation of diamond from graphite is

A) +2.0 kJ

B) - 1.5 kJ

C) -788 kJ

D) 788 kJ

• question_answer52) The type of isomerism observed in benzaldoxime is

A) optical

B) functional

C) geometrial

D) tautomerism

• question_answer53) Sodium metal is prepared commercially by electrolysis of fused $NaCl$ by

A) Downs process

B) Nelson cell

C) Solvay process

D) Castner and Kellners cell

• question_answer54) The value of $x$ is maximum for

A) $MgS{{O}_{4}}\,.\,\,x\,{{H}_{2}}O$

B) $CaS{{O}_{4}}\,.\,\,x\,{{H}_{2}}O$

C) $BaS{{O}_{4}}\,.\,\,x\,{{H}_{2}}O$

D) All have the same value of $x$

• question_answer55) Heating of ore-in absence of air below its melting point is called

A) leaching

B) roasting

C) smelting

D) calcination

• question_answer56) In fluorine group of Periodic Table, on going down

B) electronegativity increases

C) ionisation potential increases

D) reactivity increases

• question_answer57) The ether that undergoes electrophilic substitution reactions is

A) $C{{H}_{3}}O{{C}_{2}}{{H}_{5}}$

B) ${{C}_{6}}{{H}_{5}}OC{{H}_{3}}$

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

D) ${{C}_{2}}{{H}_{5}}O{{C}_{2}}{{H}_{5}}$

• question_answer58) The order of reactivity of alcohols towards sodium metal is

A) Primary > Secondary > Tertiary

B) Primary < Secondary < Tertiary

C) Primary < Secondary > Tertiary

D) Primary > Secondary < Tertiary

• question_answer59) If one mole of a substance is present in 1 kg of solvent then its concentration is called

A) molar cone

B) molal cone

C) normality

D) Strength wt/wt.

• question_answer60) If the pressure and absolute temperature of 2L of carbondioxide gas are doubled, the value of the gas would become

A) 2L

B) 4L

C) 5 L

D) 7L

• question_answer61) $C{{H}_{3}}CO{{O}^{-}}$ ion is a

A) weak conjugate base

B) strong conjugate base

C) weak conjugate acid

D) strong conjugate acid

• question_answer62) The hybrid state of C in charcoal is

A) $s{{p}^{3}}$

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

C) sp

D) No specific state

• question_answer63) The shape of $Cl{{F}_{3}}$ molecule is

A) triangular planar

B) pyramidal

C) T-shape

D) trigonal bipyramidal

• question_answer64) Equivalent weight of crystalline oxalic acid is

A) 90

B) 63

C) 53

D) 45

• question_answer65) If $x\,mol\,\,{{L}^{-1}}$ is the solubility of $KAl{{(S{{O}_{4}})}_{2}}$ then ${{K}_{sp}}$ is equal to

A) ${{x}^{3}}$

B) $4{{x}^{4}}$

C) ${{x}^{4}}$

D) $4{{x}^{3}}$

• question_answer66) In the reaction, ${{N}_{2}}(g)+{{O}_{2}}(g)2NO(g)-180.7\,kJ$ on increasing the temperature, the production of NO

A) increases

B) decreases

C) remains same

D) Cannot be predicted

• question_answer67) In an experiment, 20 mL of decinormal $HCl$solution was added to 10 mL of a decinormal $AgN{{O}_{3}}$ solution. $AgCl$ was precipitated out and the excess acid was titrated against a, decinormal $NaOH$ solution. Volume of $NaOH$required for this back titration is

A) 10 mL

B) 5 mL

C) 20 mL

D) 30 mL

• question_answer68) Consider the following statements.

 I. The colour of the hydrophobic sol depends on the wavelength of the light scattered by the dispersed particle. II. The smaller the gold number value of a hydrophilic colloid, the greater is its protective power. III. The movement of sol particle under an applied electric potential is called electroosmosis.
Which of the above statements are correct?

A) I and II

B) I and III

C) II and III

D) I, II and III

A) $CO+{{H}_{2}}$

B) $CO+{{N}_{2}}$

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

D) None of these

A) $N{{a}_{2}}{{B}_{4}}{{O}_{7}}\,.\,10{{H}_{2}}O$

B) $C{{a}_{2}}{{B}_{6}}{{O}_{11}}\,.\,5{{H}_{2}}O$

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

D) ${{H}_{3}}B{{O}_{3}}$

• question_answer71) Arsenic drugs are mainly used in the treatment of

A) jaundice

B) typhoid

C) syphilis

D) cholera

• question_answer72) Which of the following statements is not correct?

A) Methylamine is more basic than $N{{H}_{3}}$

B) Amines form hydrogen bonds

C) Ethylamine has higher boiling point than propane

D) Dimethylamine is less basic than methylamine

• question_answer73) Which one of the following will be most basic?

A) Aniline

B) p-methoxyaniline

C) p-nitroaniline

D) Benzylamine

• question_answer74) The final product of oxidation of 2-propanol with hot cone. $HN{{O}_{3}}$ is

A) propanal

B) ethanoic acid

C) propanone

D) ethanol

• question_answer75) Bimolecular reduction of acetone gives

A) diacetoneamine

B) pinacol

C) chloretone

D) propane

A) hydrazine

B) phenyl hydrazine

C) semicarbazide

D) hydrogen cyanide

• question_answer77) Amongst the following, the compound which is most difficult to sulphonate is

A) benzene

B) nitrobenzene

C) toluene

D) chlorobenzene

• question_answer78) Acetonitrile is prepared by treating an alcoholic solution of methyl iodide with

A) silver cyanide

B) potassium cyanide

C) hydrogen cyanide

D) ammonia

• question_answer79) During polymerisation of acetylene to benzene, the state of hybridisation of-carbon changes from

A) $s{{p}^{2}}$to sp

B) $s{{p}^{3}}$ to sp

C) sp to $s{{p}^{3}}$

D) sp to $s{{p}^{2}}$

• question_answer80) Which one of the following series contains electrophiles only?

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

B) $N{{H}_{3}},{{H}_{2}}O,\,AlC{{l}_{3}}$

C) $AlC{{l}_{3}},S{{O}_{3}},\overset{+}{\mathop{N}}\,{{O}_{2}}$

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

• question_answer81) The equilibrium constants for the reactions ${{N}_{2}}+3{{H}_{2}}2N{{H}_{3}}$ and $\frac{1}{2}{{N}_{3}}+\frac{3}{2}{{H}_{2}}N{{H}_{3}}$ are ${{K}_{1}}$ and ${{K}_{2}}$ respectively. Which one of the following is the correct relationship?

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

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

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

D) ${{K}_{1}}={{K}_{2}}$

• question_answer82) When we increase the temperature, the rate of reaction increases because of

A) more number of collisions

B) decrease in mean free path

C) more number of energetic electrons

D) less number of energetic electrons

• question_answer83) The pH of buffer of $N{{H}_{4}}Cl$ type is given by

A) $pH=p{{K}_{b}}$

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

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

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

• question_answer84) Azimuthal quantum number determines the

A) size

B) spin

C) orientation

D) angular momentum of orbitals

• question_answer85) The formation of colloid from suspension is called

A) peptisation

B) condensation

C) sedimentation

D) fragmentation

• question_answer86) Other things being equal, the EMF of a Daniell cell may be increased by

A) keeping low temperature

B) using large copper electrodes

C) using large zinc electrodes

D) decreasing concentration of $C{{u}^{2+}}$ ions

• question_answer87) Which one of the following can be considered as a weak electrolyte?

A) $NaCl$

B) $HCl$

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

D) ${{K}_{2}}S{{O}_{4}}$

• question_answer88) lodoform can be prepared from all except

A) acetaldehyde

B) 3-methyl-2-butanone

C) iso-butyl alcohol

D) acetophenone

• question_answer89) The end product C in the following sequence of chemical reactions is $C{{H}_{3}}COOH\xrightarrow{CaC{{O}_{3}}}A\xrightarrow{Heat}\xrightarrow{N{{H}_{2}}OH}C$

A) acetaldehyde oxime

B) formaldehyde oxime

C) methyl nitrate

D) acetoxime

• question_answer90) Synthetic human hair wigs are made from a copolymer of vinyl chloride and acrylonitrile and is called

A) PVC

B) polyacrylonitrile

C) cellulose

D) dynel

• question_answer91) Which one of the following is not an example of chain growth polymer?

A) Neoprene

B) Buna-S

C) PMMA

D) Glyptal

• question_answer92) Most abundant water pollutant is

A) detergents

B) industrial wastes

C) pesticides

D) oil spills

• question_answer93) Paulings electronegativity values for elements are useful in predicting

A) polarity of the molecules

B) position in the EMF series

C) coordination numbers

D) dipole moments

• question_answer94) A neutral ferilizer among the following is

A) CAN

B) ammonium sulphate

C) ammonium nitrate

D) urea

• question_answer95) Transition metal with low oxidation number will act as

A) an oxidising agent

B) abase

C) an acid

D) None of these

• question_answer96) In $LiAl{{H}_{4}}$, the ligand is

A) H

B) ${{H}^{+}}$

C) ${{H}^{-}}$

D) $2{{H}_{2}}$

• question_answer97) Iodide of Millons base is

A) $Hg{{I}_{2}}$

B) ${{K}_{2}}Hg{{I}_{4}}$

C) $N{{H}_{2}}HgO\,.\,\,HgI$

D) $N{{H}_{4}}I$

• question_answer98) Ce-58 is a member of

A) s-block elements

B) p-block elements

C) d-block elements

D) f-block elements

• question_answer99) Complete hydrolysis of $Xe{{F}_{2}}$ gives

A) Xe

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

C) HF

D) AH of these

• question_answer100) The alloy best suited for making metre scales is

A) stainless steel

B) invar

C) alnico

D) tungsten steel

• question_answer101) The capsid of virus is synthesized on

A) nucleus of the virus

B) ribosomes of the host

C) mitochondria of the host

D) plasma membrane of the host

• question_answer102) Which of the following is not a prorist?

A) Amoeba

B) Taenia

C) Paramecium

D) Euglena

A) bryophytes

B) pteridophytes

C) gymnosperms

D) angiosperms

A) in culture media

B) in the body of living host

C) on dead and decaying matther

D) All of the above

• question_answer105) An intracellular parasite is

A) Entamoeba

B) Ascaris

C) Trypanosoma

D) Plasmodium

• question_answer106) Mycorrhizal association is must for growth of

A) mushrooms

B) orchids

C) sal and teak

D) None of these

• question_answer107) Antherozoids of pteridophyta are

A) much coiled and multiciliated

B) pear-shaped and biflagellate

C) cork screw-shaped and multiflagellated

D) All of the above

• question_answer108) Pectin substance is generally stained with

A) iodine

B) light green

C) cotton blue

D) ruthenium red

• question_answer109) Blood cell which shows phagocytosis is

A) eosinophyll

B) basophyll

C) monocyte

D) platelet

• question_answer110) Amitosis is a division

A) involving spindle formation

B) involving formation of chromosome bridges

C) in which chromosome number becomes half

D) in which cell divide

• question_answer111) All of the followings are composed exclusively of glucose, except

A) amylose

B) cellulose

C) lactose

D) maltose

• question_answer112) The percentage of heterozygous individuals obtained from selfing Rr individual, is

A) 25

B) 75

C) 50

D) 100

• question_answer113) Balbiani rings are the centre for

A) DNA synthesis

B) RNA synthesis

C) Both [a] and [b] synthesis

D) None of the above

• question_answer114) You are studying a bacterial virus and found its base composition to be A = 22%, T = 28%, G = 20% and C = 30%. What is your conclusion regarding its genetic material?

A) Single-stranded RNA

B) Double-stranded RNA

C) Single-stranded DNA

D) Double-stranded DNA

• question_answer115) Which one is the Pribnow box?

A) 5 TATAAT 3

B) 5 TAATTA 3

C) 5 AATAAT 3

D) 5 ATATTA 3

• question_answer116) A woman with Straight hair marries a man with curly hair who is known to be heterozygous for the trait. What is the chance that their first child will have curly hair?

A) No chance

B) One in two

C) It is certain

D) One in four

A) air

B) water

C) land

D) all of these

• question_answer118) Which of these is mismatched?

A) Coenozoic-Grasses and humans

C) Palaeozoic-Prokaryotes and unicellular eukaryotes

D) Cambrian-Marine organism with external skeletons

• question_answer119) 200 seeds are produced from how many fruits of maize?

A) 200

B) 100

C) 50

D) 5

• question_answer120) Outer part of bark consisting of dead cells refers to

A) rhytidome

B) phellem

C) phellogen

D) phelloderm

• question_answer121) A person supplied excess fertilizers and watered the plants well. After sometime, the leaves turn brown because

A) exosmosis occurs in root and the plant dies

B) fertilizer is drained in lower layer of soil

C) it decreases photosynthesis

D) due to water logging soil

• question_answer122) Which of the fallowing elements are used up in phosphorylaften?

A) N and P

B) I and P

C) Ca and Mg

D) Ca and S

• question_answer123) Agranal chloroplasts occur in certain

A) succulents

B) ${{C}_{4}}$plants

C) hydrophytes

D) ${{C}_{3}}$plants

• question_answer124) How many ATP and $NAD{{H}_{2}}$ are produced in photorespiration?

A) 2 and 4

B) 1 and 2

C) 4 and 6

D) zero

• question_answer125) Embryonic connective tissue is derived from

A) ectoderm

B) mesoderm

C) endoderm

D) All of these

A) muscle protein

B) digestive enzyme

C) water soluble vitamin

D) high energy reservoir

• question_answer127) A renal portal system is found in

A) man

B) frog

C) horse

D) rabbit

A) polypeptides

B) polysaccharide in any medium

C) polysaccharide in acidic medium

D) polysaccharide in alkaline medium

• question_answer129) During forced expiration, actively contracting muscles include the

A) diaphragm

B) external intercostals

C) abdominal muscles

D) All of the above

• question_answer130) Which term does not apply to human heart?

A) Pace-maker

B) Mitral valve

C) Neurogenic

D) Four-chambered

• question_answer131) Synthesis of urea in liver takes place by

A) nitrogen cycle

B) Krebs cycle

C) ornithine cycle

D) glycolysis

• question_answer132) A disease associated with pain and swelling is

A) arthritis

B) Pagets disease

C) glaucoma

D) Homers syndrome

A) neural messenger

B) antistress hormone

C) chemical messenger

D) chemical transmitter

• question_answer134) Which of the following hormones is a modified amino acid?

A) MSH

B) Oestrogen

C) Epinephrine

D) Prostaglandin

A) two similar genomes

B) only one genome

C) several genomes

D) one genome and two plasmones

• question_answer136) Maximum amount of growth in root occurs

A) in the absence of light

B) at its apex

C) behind the apex

D) in the presence of soil

A) At the onset of menopause, the woman stops producing them

B) They are produced by the human female throughout adiosecence

C) Those produced by the females are stored in the seminiferous tubules

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

• question_answer138) In which type of egg, total cleavage is possible?

A) Telolecithal

B) Oligolecithal

C) Centrolecithal

D) Macrolecithal

• question_answer139) Programmed cell death is scientifically termed as

A) cell lysis

B) apoptosis

C) autotomy

D) None of these

• question_answer140) Alluvial soil is a type of

A) residual soil

B) transport soil

C) well mature soil

D) None of these

• question_answer141) The extreme top of Mount Everest is in the region of

A) stratosphere

B) stratopause

C) troposphere

D) mesosphere

• question_answer142) A virgin ecosystem can be seen in

A) Eastern Himalaya

B) Shimla

C) Nainital

D) Silent valley of Kerala

• question_answer143) Transitional zone between two vegetational type is referred to

A) ecotone

B) ecotype

D) ecophenes

• question_answer144) Sewage water turns black due to action of

A) ${{H}_{2}}S$

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

C) $C{{H}_{4}}$

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

• question_answer145) Which habitat shows highest diversity of living species?

A) Deserts

B) Temperate forests

C) Tropical rainforests

D) Grasslands

• question_answer146) AZT is the treatment of

A) TB

B) AIDS

C) malaria

D) kala-azar

• question_answer147) A disease caused by one of the smallest viruses is

A) trachoma

B) poliomyelitis

C) mumps

D) measles

A) codeine

B) nicotine

C) morphine

D) cocaine

• question_answer149) Membrane attack complex is formed by

A) e-lymphocytes

B) macrophages

C) t-lymphocytes

D) complements

A) cell culture

B) cell culture free from microorganisms

C) cell culture free from nutrients

D) None of the above