# Solved papers for BCECE Medical BCECE Medical Solved Papers-2012

### done BCECE Medical Solved Papers-2012

• question_answer1) The dimensional formula of wave number is

A) $[{{M}^{0}}{{L}^{0}}{{T}^{0}}]$

B) $[{{M}^{0}}{{L}^{-1}}{{T}^{0}}]$

C) $[{{M}^{0}}{{L}^{0}}{{T}^{-1}}]$

D) $[{{M}^{-1}}{{L}^{-1}}{{T}^{0}}]$

• question_answer2) A body of mass m is moving in a circle of radius r with a constant speed $\upsilon$. If a force $\frac{m{{v}^{2}}}{r}$ is acting on the body towards the centre, then what will be the work done by this force in moving the body over half the circumference of the circle?

A) Zero

B) $\frac{m{{v}^{2}}}{{{r}^{2}}}$

C) $\frac{m{{v}^{2}}}{r}\times \pi r$

D) $\frac{\pi {{r}^{2}}}{m{{v}^{2}}}$

• question_answer3) If under the action of a force $(4i+j+3k)\,N$, a particle moves from position ${{r}_{1}}=3i+2j-6k$ to position ${{r}_{2}}=14i+13j+9k$, then the work done will be

A) 50 J

B) 75 J

C) 300 J

D) 175 J

• question_answer4) A particle of mass m moving with velocity u makes an elastic one dimensional collision with a stationary particle of mass m. They are in contact for a short time T. Their force of interaction increases from zero to ${{F}_{0}}$ linearly in time $\frac{T}{2}$ and decreases linearly to zero in further time $\frac{T}{2}$ (shown in figure). The magnitude of ${{F}_{0}}$ is

A) $mu/2T$

B) mu/T

C) 2mu/T

D) None of these

• question_answer5) Two planets revolves around the sun with frequencies ${{N}_{1}}$ and ${{N}_{2}}$ revolutions per year. If their average radii (orbital) be ${{R}_{1}}$ and ${{R}_{2}}$ respectively, then ${{R}_{1}}/{{R}_{2}}$ is equal to

A) ${{({{N}_{1}}/{{N}_{2}})}^{2/3}}$

B) ${{({{N}_{1}}/{{N}_{2}})}^{3/2}}$

C) ${{({{N}_{2}}/{{N}_{1}})}^{2/3}}$

D) ${{({{N}_{2}}/{{N}_{1}})}^{3/2}}$

• question_answer6) To what height water should be filled in a container of height 21 cm, so that it appears as half filled when viewed from the top $\left( Tak{{e}_{a}}{{\mu }_{w}}=\frac{4}{3} \right)$

A) 12 cm

B) 15 cm

C) 10.5 cm

D) 7 cm

• question_answer7) A progressive wave is represented as $y=0.2\cos \pi \left( 0.04+0.2x-\frac{\pi }{6} \right)$ where distance is expressed in cm and time in second. What will be the minimum distance between two particles having the phase difference of $\frac{\pi }{2}$?

A) 4 cm

B) 8 cm

C) 25 cm

D) 12.5 cm

• question_answer8) When the temperature increases, then the frequency of the sound produced by the organ pipe will

A) unchanged

B) increases

C) decreases

D) Not definite

• question_answer9) The distance between the poles of a horse shoe magnet is 0.1 m and its pole strength is 0.01 A-m. The induction of magnetic field at a point mid way between the poles will be

A) Zero

B) $2\times {{10}^{-5}}T$

C) $4\times {{10}^{-6}}T$

D) $8\times {{10}^{-7}}T$

• question_answer10) Which logic gate is represented by the following combination of logic gates?

A) OR

B) NAND

C) XOR

D) None of these

• question_answer11) For the transistor circuit shown in figure, if$\beta =100$, voltage drop across emitter and base is 0.7 V, then the value of ${{V}_{CE}}$ will be

A) Zero

B) 5 V

C) 10 V

D) 13 V

• question_answer12) If a uniform solid sphere and a disc of same mass and same radius rolls down on an inclined smooth plane from rest to the same distance, then the ratio of the time taken by them will be

A) 15 : 14

B) $\sqrt{14}\,:\,\sqrt{15}$

C) 14 : 15

D) ${{15}^{2}}\,:\,{{14}^{2}}$

• question_answer13) If a stone is projected from ground with a velocity $50\,m{{s}^{-1}}$ and at an angle of ${{30}^{o}}$, it takes 3 s to cross a wall. How far beyond the wall the stone will strike the ground? (Take $g=10\,\,m{{s}^{-2}}$)

A) 50.5 m

B) 91.5 m

C) 86.6 m

D) 100 m

• question_answer14) For a body starting from rest, what will be the ratio of the distance travelled by the body during the 4th and 3rd second during its journey?

A) $\frac{7}{5}$

B) $\frac{7}{3}$

C) $\frac{5}{7}$

D) $\frac{3}{7}$

• question_answer15) If the compressibility of water is a (sigma) per unit atmospheric pressure, then the decrease in volume V due to p, atmospheric pressure will be

A) $\sigma V/p$

B) $\sigma pV$

C) $\sigma /pV$

D) $\sigma p/V$

• question_answer16) A soap film of surface tension $3\times {{10}^{-2}}N{{m}^{-1}}$ formed in a rectangular frame, can support a straw. If the length of the film is 10 cm, then the mass of the straw that film can support is

A) 0.06 g

B) 0.6 g

C) 6g

D) 60g

• question_answer17) There are two identical small holes of area of cross section a on the either sides of a tank containing a liquid of density $\rho$ (shown in figure). The difference in height between the holes is ft. Tank is resting on a smooth horizontal surface. Horizontal force which will has to be applied on the tank to keep it in equilibrium is

A) $\frac{2gh}{\rho a}$

B) $\frac{\rho gh}{a}$

C) $gh\rho a$

D) $2\rho agh$

• question_answer18) Certain amount of an ideal gas of molecular mass M is contained in a closed vessel. If the vessel is moving with a constant velocity v, then the rise in temperature of the gas when the vessel is suddenly stopped will be $\left( Take\,\,\gamma =\frac{{{C}_{p}}}{{{C}_{V}}} \right)$

A) $\frac{M{{v}^{2}}}{2\,R(\gamma +1)}$

B) $\frac{M{{v}^{2}}}{2\,R(\gamma -1)}$

C) $\frac{M{{v}^{2}}(\gamma -1)}{2\,R}$

D) $\frac{M{{v}^{2}}(\gamma +1)}{2\,R}$

• question_answer19) Water and turpentine oil (specific heat less than that of water) are both heated to same temperature. Equal amounts of both are then placed in identical calorimeters and then left in air

A) A and B will represent cooling curves of water and oil respectively

B) B and A will represent cooling curves of water and oil respectively

C) their cooling curves will be identical

D) None of the above

• question_answer20) By suspending a mass of 0.50 kg a spring is stretched by 8.20 m. If a mass of 0.25 kg is suspended, then its period of oscillation will be (Take $g=10\,\,m{{s}^{-2}}$)

A) 0.137 s

B) 0.328 s

C) 0.628 s

D) 1.00 s

• question_answer21) If the period of revolution of a nearest satellite around a planet of radius R is T then its period of revolution around another planet, having radius 3JR and same density will be

A) T

B) 3T

C) 3V3T

D) 9T

• question_answer22) A body of mass m is suspended from a string of length $l$. What is the minimum horizontal velocity that should be given to the body at its lowest position so that it may complete one full revolution in the vertical plane with the point of suspension as the centre of the circle?

A) $v=\sqrt{2lg}$

B) $v=\sqrt{3lg}$

C) $v=\sqrt{4lg}$

D) $v=\sqrt{5lg}$

• question_answer23) Rest mass energy of an electron is 0.54 MeV. If velocity of the electron is 0.8 C, then its kinetic energy will be

A) 0.36 MeV

B) 0.41 MeV

C) 0.48 MeV

D) 1.32 MeV

• question_answer24) Which one of the following graphs represents the graph between the instantaneous concentration (N) of a radioactive element and time (t)?

A)

B)

C)

D)

• question_answer25) In the circuit given below the value of current is

A) 0

B) ${{10}^{-2}}A$

C) ${{10}^{2}}A$

D) ${{10}^{-3}}A$

• question_answer26) In a diode AM detector, the output circuit consists of $R=1\,k\Omega$ and $C=10\,pF$. A carrier signal of 100 k Hz is to be detected. Is it good?

A) Yes

B) No

C) Information is not sufficient

D) None of the above

• question_answer27) Let a straight wire of length I carries a current$i$. The magnitude of magnetic field produced by the current at point P (as shown in figure) is

A) $\frac{{{\mu }_{0}}i}{2\sqrt{2}\pi l}$

B) $\frac{\sqrt{2}{{\mu }_{0}}i}{8\pi l}$

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

D) $\frac{\sqrt{2}{{\mu }_{0}}i}{\pi l}$

• question_answer28) 0.8 J work is done in rotating a magnet by ${{60}^{o}}$, placed parallel to a uniform magnetic field. How much work is done in rotating it ${{30}^{o}}$further?

A) $0.8\times {{10}^{7}}\,erg$

B) 0.8 erg

C) 8J

D) 0.4 J

• question_answer29) The magnetic moment produced in a substance of 1 g is $6\times {{10}^{-7}}\,\,A-{{m}^{2}}$. If its density is $5\,g\,c{{m}^{-3}}$, then the intensity of magnetisation in A/m will be

A) 3.0

B) $3\times {{10}^{-6}}$

C) $8.3\times {{10}^{6}}$

D) $1.2\times {{10}^{-7}}$

• question_answer30) In which of the following circuit is the current maximum just after the switch S is closed?

A) (i)

B) (ii)

C) (iii)

D) Both (ii) and (iii)

• question_answer31) Let ABC is a right angled triangle in which AB = 3 cm and BC = 4 cm and $\angle ABC={{90}^{o}}$. The three charges +15, +12 and -20 esu are placed on 4, B and C respectively. The force acting on B will be

A) Zero

B) 25 dyne

C) 30 dyne

D) 150 dyne

• question_answer32) Four plates of same area of cross-section are joined as shown in figure. The distance between each plate is d. The equivalent capacity between A and B will be

A) $\frac{2\,{{\varepsilon }_{0}}\,A}{d}$

B) $\frac{{{\varepsilon }_{0}}\,A}{d}$

C) $\frac{3{{\varepsilon }_{0}}\,A}{d}$

D) $\frac{3{{\varepsilon }_{0}}\,A}{2\,d}$

• question_answer33) If a voltmeter of resistance 1000 $\Omega$ is connected across a resistance of 500 $\Omega$ in the given circuit, then the reading of voltmeter will be

A) 1 V

B) 2 V

C) 6 V

D) 4 V

• question_answer34) In the grid circuit of a triode a signal $E=2\sqrt{2}\cos \,\omega t$ is applied. If $\mu =14$ and${{r}_{p}}=10\,\,k\Omega$, then rms current flowing through ${{R}_{L}}=12\,k\Omega$ will be

A) 1.5 mA

B) 1.27 mA

C) 10 mA

D) 12.4 mA

• question_answer35) A rigid body of mass m rotates with angular velocity g) about an axis at a distance a from the centre of mass C. The radius of gyration about C is K. Then, kinetic energy of rotation of the body about new parallel axis is

A) $\frac{1}{2}m{{K}^{2}}{{\omega }^{2}}$

B) $\frac{1}{2}m{{a}^{2}}{{\omega }^{2}}$

C) $\frac{1}{2}m(a+{{K}^{2}}){{\omega }^{2}}$

D) $\frac{1}{2}m({{a}^{2}}+{{K}^{2}}){{\omega }^{2}}$

• question_answer36) The angle of contact between glass and water is ${{0}^{o}}$ and it rises in a capillary upto 6 cm when its surface tension is 70 dyne/cm. Another liquid of surface tension 140 dyne/cm, angle of contact ${{60}^{o}}$ and relative density 2 will rise in the same capillary by

A) 3 cm

B) 16 cm

C) 12 cm

D) 24 cm

• question_answer37) If the height of a mercury barometer is 75 cm at sea level and 50 cm at the top of a hill and the ratio of density of mercury to that of air is ${{10}^{4}}$ then the height of the hill is

A) 1.25 km

B) 2.5 km

C) 250 m

D) 750 m

• question_answer38) If the displacement equation of a particle from its mean position is given as $y=0.2\sin \,(10\pi t+1.5\pi )cos(10\pi t+1.5\pi )$ then, the motion of particle is

A) anon-periodic

B) periodic but not SHM

C) SHM with period 0.2 s

D) SHM with period 0.1 s

• question_answer39) Let PQR is a right angled prism with other angles as ${{60}^{o}}$ and ${{30}^{o}}$. PQ has a thin layer of liquid and light falls normally oh the face PR as shown in figure. If the refractive index of prism is 1.5, then for total internal reflection, maximum refractive index of liquid will be

A) 1.2

B) 1.3

C) 1.4

D) 1.5

• question_answer40) According to corpuscular theory of light, the different colours of light are due to

A) different size of the corpuscules

B) different electromagnetic waves

C) different force of attraction among the corpuscles

D) None of the above

• question_answer41) An antenna is a device

A) that converts radio frequency signal into electromagnetic theory

B) that converts electromagnetic energy into radio frequency signal

C) that converts guided electromagnetic waves into free space electromagnetic waves and vice-versa

D) None of the above

• question_answer42) A resistor R, inductor L and a capacitor C are connected in series to an oscillator of frequency v. If the resonant frequency is ${{v}_{r}}$, theft the current lags behind the voltage, when

A) $v=0$

B) $v<{{v}_{r}}$

C) $v>{{v}_{r}}$

D) $v={{v}_{r}}$

• question_answer43) The instantaneous values of current and voltage in an AC circuit are $i=100\sin 314t$ amp and $e=200\sin \left( 314t+\frac{\pi }{3} \right)V$ respectively. If the resistance is $1\,\Omega$, then the reactance of the circuit will be

A) $\sqrt{3}\,\Omega$

B) $100\sqrt{3}\,\Omega$

C) $-200\sqrt{3}\,\Omega$

D) $-200/\sqrt{3}\,\Omega$

• question_answer44) When green light is incident on the surface of a metal. It emits photo electrons but there is no such emission with yellow colour light. Which one of the colour can produce emission of photo electrons?

A) Red

B) Indigo

C) Orange

D) None of these

• question_answer45) If an electron jumps from the 4th orbit to the 2nd orbit of hydrogen atom, then the frequency of emitted radiation in the hertz will be (Take Rydbergs constant, $R={{10}^{5}}\,c{{m}^{-1}}$)

A) $\frac{3}{4}\times {{10}^{15}}$

B) $\frac{3}{16}\times {{10}^{15}}$

C) $\frac{3}{16}\times {{10}^{15}}$

D) $\frac{9}{16}\times {{10}^{15}}$

• question_answer46) If the ratio of radii of nuclei $_{13}^{27}$Al and $_{52}^{A}X$ is 3 : 5, then the number of neutrons in the nuclei of X will be

A) 13

B) 52

C) 100

D) 73

• question_answer47) Number of nuclei of a radioactive substance at time t = 0 are 1000 and 900 at time t = 2 s. What will be the number of nuclei at time t = 4 s?

A) 810

B) 800

C) 790

D) 700

• question_answer48) A bar magnet has coercivity $4\times {{10}^{3}}A{{m}^{-1}}$. It is desired to demagnetise it by inserting it inside a solenoid 12 cm long and having 60 turns. The current that should be sent through the solenoid is

A) 8 A

B) 10A

C) 12 A

D) 14 A

• question_answer49) A potentiometer is an ideal device of measuring potential difference because

A) it uses a sensitive galvanometer

B) it is an elaborate arrangement

C) it has a long wire hence heat developed is quickly radiated

D) it does not disturb the potential difference it measures

• question_answer50) If the momentum of a body is increased by n times, then its kinetic energy increases

A) n times

B) ${{n}^{2}}$ times

C) $2n$ times

D) $\sqrt{n}$ times

• question_answer51) When 1 mole gas is heated at constant volume, temperature is raised from 298 K to 308K. Heat supplied to the gas is 500 J. Then which statement is correct?

A) $q=w=500\,J,\,\,\Delta U=0$

B) $q=\Delta U=500\,J,w=0$

C) $q=W=500\,J,\Delta U=0$

D) $\Delta U=0,\,\,q=W=-500\,J$

• question_answer52) For the reaction, $2{{N}_{2}}{{O}_{5}}\to 4N{{O}_{2}}+{{O}_{2}}$ rate and rate constant are $1.02\times {{10}^{-4}}$ and$3.4\times {{10}^{-5}}{{s}^{-1}}$ respectively, then concentration of ${{N}_{2}}{{O}_{5}}$ at that time will be

A) 1.732

B) 3

C) $1.02\times {{10}^{-4}}$

D) $3.4\times {{10}^{5}}$

• question_answer53) A human body required the 0.01 M activity of radioactive substance after 24 h. Half-life of radioactive substanu is 6 h. Then injection of maximum activity of radioactive substance that can be injected

A) 0.08

B) 0.04

C) 0.16

D) 0.32

• question_answer54) Molarity of liquid $HCl$ if density of solution is 1.17 g/cc

A) 36.5

B) 18.25

C) 32.05

D) 42.10

• question_answer55) Which one of the following is not paramagnetic?

A) NO

B) $N_{2}^{+}$

C) CO

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

• question_answer56) Among the following ions the $p\pi -d\pi$ overlap could be present in

A) $NO_{2}^{-}$

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

C) $PO_{4}^{3-}$

D) $CO_{3}^{2-}$

• question_answer57) A compound formed by elements A and B crystallises in the cubic structure where A atoms are at the corners of a cube and B atoms are at the face centres. The formula of the compound is

A) ${{A}_{2}}{{B}_{2}}$

B) $A{{B}_{3}}$

C) AB

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

• question_answer58) Assuming fully decomposed, the volume of$C{{O}_{2}}$ released at STP on heating 9.85 g of $BaC{{O}_{3}}$ (atomic mass, Ba = 137) will be

A) 1.12L

B) 0.84 L

C) 2.24 L

D) 4.06 L

• question_answer59) The correct structure of $Fe{{(CO)}_{5}}$ is

A) trigonal bipyramidal

B) octahedral

C) tetrahedral

D) square pyramidal

• question_answer60) Which one of the following forms a colourless solution in aqueous medium? (Atomic number$Sc=21,\,\,Ti=22,\,V=23,Cr=24$)

A) ${{V}^{3+}}$

B) $C{{r}^{3+}}$

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

D) $S{{c}^{3+}}$

• question_answer61) $_{92}{{U}^{235}}$ nucleus absorbs a neutron and disintegrate in $_{54}X{{e}^{139}},\,{{\,}_{38}}S{{r}^{94}}$ and X so, what will be product X?

A) 3-neutrons

B) 2-neutrons

C) $\alpha$-particle

D) $\beta$-particle

• question_answer62) In hydrogen atom, energy of first excited state is -3.4 eV. Then KE of same orbit of hydrogen atom

A) + 3.4 eV

B) + 6.8 eV

C) - 13.6eV

D) + 13.6 eV

• question_answer63) Reaction, $Ba{{O}_{2}}(s)BaO(s)+{{O}_{2}}(g);\,\Delta H=+ve$. In equilibrium condition, pressure of ${{O}_{2}}$depends on

A) increased mass of $Ba{{O}_{2}}$

B) increased mass of BaO

C) increased temperature of equilibrium

D) increased mass of $Ba{{O}_{2}}$ and BaO both

• question_answer64) Solution of $0.1\,N\,N{{H}_{4}}OH$ and $0.1\,N\,N{{H}_{4}}Cl$ has $pH\,9.25$, then find out $p{{K}_{b}}$ of $N{{H}_{4}}OH$.

A) 9.25

B) 4.75

C) 3.75

D) 8.25

• question_answer65) van der Waals real gas, acts as an ideal gas at which condition?

A) High temperature, low pressure

B) Low temperature, high pressure

C) High temperature, high pressure

D) Low temperature, low pressure

• question_answer66) Unit of entropy is

A) $J{{K}^{-1}}mo{{l}^{-1}}$

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

C) ${{J}^{-1}}{{K}^{-1}}mo{{l}^{-1}}$

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

• question_answer67) $3A\xrightarrow{{}}B+C$ It would be a zero order reaction when

A) the rate of reaction is proportional to square of concentration of A

B) the rate of reaction remains the same at any concentration of A

C) the rate remains unchanged at any concentration of B and C

D) the rate of reaction doubles if concentration of B is increased to double

• question_answer68) In electrolysis of $NaCl$ when Pt electrode is taken then ${{H}_{2}}$ is liberated at cathode while with Hg cathode it forms sodium amalgam because

A) Hg is more inert than Pt

B) more voltage is required to reduce H+ at Hg than at Pt

C) Na is dissolved in Hg while it does not dissolved in Pt

D) concentration of ${{H}^{+}}$ ions is larger when Pt electrode is taken

• question_answer69) Which of the following statement is true?

A) Silicon exhibits 4 coordination number in its compounds

B) Bond energy of ${{F}_{2}}$ is less than $C{{l}_{2}}$

C) Mn(III) oxidation state is more stable than Mn(II) in aqueous state

D) Elements of 15th group shows only +3 and +5 oxidation states

• question_answer70) An atom has electronic configuration$1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}}3{{d}^{3}},4{{s}^{2}}$. You will place it in

A) fifth group

B) fifteenth group

C) second group

D) third group

• question_answer71) The hypothetical complex chloro diaquatriammine cobalt (III) chloride can be represented as

A) $[CoCl{{(N{{H}_{3}})}_{3}}{{({{H}_{2}}O)}_{2}}]C{{l}_{2}}$

B) $[Co{{(N{{H}_{3}})}_{3}}({{H}_{2}}O)C{{l}_{3}}]$

C) $[Co{{(N{{H}_{3}})}_{3}}{{({{H}_{2}}O)}_{2}}Cl]$

D) $[Co{{(N{{H}_{3}})}_{3}}{{({{H}_{2}}O)}_{3}}]C{{l}_{3}}$

• question_answer72) In the silver plating of copper, $K[Ag{{(CN)}_{2}}]$ is used instead of $AgN{{O}_{3}}$. The reason is

A) a thin layer of Ag is formed on Cu

B) more voltage is required

C) $A{{g}^{+}}$ ions are completely removed from solution

D) less availability of $A{{g}^{+}}$ ions, as Cu cannot displace Ag from $[Ag{{(CN)}_{2}}]$ ion

• question_answer73) $CuS{{O}_{4}}$ when reacts with KCN forms CuCN which is insoluble in water. It is soluble in excess of KCN due to the formation of the following complex

A) ${{K}_{2}}[Cu{{(CN)}_{4}}]$

B) ${{K}_{3}}[Cu{{(CN)}_{4}}]$

C) $CuC{{N}_{2}}$

D) $Cu\,[K\,Cu{{(CN)}_{4}}]$

• question_answer74) Zn gives ${{H}_{2}}$ gas with ${{H}_{2}}S{{O}_{4}}$ and $HCl$ but not with $HN{{O}_{3}}$

A) Zn act as oxidising agent when react with $HN{{O}_{3}}$

B) $HN{{O}_{3}}$ is weaker acid than ${{H}_{2}}S{{O}_{4}}$ and $HCl$

C) in electrochemical series Zn is above hydrogen

D) $NO_{3}^{-}$ is reduced in preference to hydronium ion

• question_answer75) IUPAC name of the following is $C{{H}_{2}}=CH-C{{H}_{2}}-C{{H}_{2}}-C\equiv CH$

A) 1, 5-hexenyne

B) l-hexene-5-yne

C) 1-hexyne-5-ene

D) 1, 5-hexynene

• question_answer76) Product P in the above reaction is

A)

B)

C)

D)

• question_answer77) n-propyl alcohol and isopropyl alcohol can be chemically distinguished by which reagent?

A) PCIs

B) Reduction.

C) Oxidation with potassium dichromate

D) Ozonolysis

• question_answer78) In the following reaction, product P is $R-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-Cl\xrightarrow[Pd-BaS{{O}_{4}}]{{{H}_{2}}}P$

A) $RC{{H}_{2}}OH$

B) RCOOH

C) RCHO

D) $RC{{H}_{3}}$

A) edible proteins

B) proteins with specific structure

C) nitrogen containing carbohydrates

D) carbohydrates

• question_answer80) Geometrical isomers differ in

A) position of functional group

B) position of atoms

C) spatial arrangement of atoms

D) length of carbon chain

• question_answer81) Monomer of ${{\left[ -\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,}}\,-C{{H}_{2}}- \right]}_{n}}$ is

A) 2-methylpropene

B) styrene

C) propylene

D) ethane

• question_answer82) Which one of the following will have largest number of atoms?

A) 1 g Au

B) 1 g Na

C) 1 g Li

D) $1\,g\,C{{l}_{2}}$

• question_answer83) The size of isoelectronic species ; ${{F}^{-}},Ne,\,N{{a}^{+}}$ is affected by

A) nuclear charge (Z)

B) valence principal quantum number (n)

C) electron-electron interaction in the outer orbitals

D) None of the factors because their size is the same

• question_answer84) $\Delta {{U}^{o}}$ of combustion of methane is$-X\,k\,J\,mo{{l}^{-1}}$. The value of $\Delta {{H}^{o}}$ is

A) $=\Delta {{U}^{o}}$

B) $>\Delta {{U}^{o}}$

C) $<\Delta {{U}^{o}}$

D) = 0

• question_answer85) In the sample of soft drink, the concentration of ${{H}^{+}}$ ion is $3.8\times {{10}^{-3}}M$. Its pH is

A) 2

B) 2.42

C) 3

D) 3.42

• question_answer86) Which one of the following alkali metals gives hydrated salts?

A) Li

B) Na

C) K

D) Cs

• question_answer87) Boric acid is polymeric due to

A) its acidic nature

B) the presence of hydrogen bonds

C) its monobasic nature

D) its geometry

• question_answer88) Which one of the following carbocation is most stable?

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

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

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

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

• question_answer89) The best and latest technique for isolation, purification and separation of organic compounds is

A) crystallisation

B) distillation

C) sublimation

D) chromatography

• question_answer90) Which one of the following vitamins is water soluble?

A) Vitamin B

B) Vitamin E

C) Vitamin K

D) Vitamin A

• question_answer91) Which one of the following on reduction with lithium aluminium hydride yield a secondary amine?

A) Nitroethane

B) Methyl isocyanide

C) Acetamide

D) Methyl cyanide

• question_answer92) Which one of the following ionic species has the greatest proton affinity to form stable compound?

A) $H{{S}^{-}}$

B) $NH_{2}^{-}$

C) ${{F}^{-}}$

D) ${{I}^{-}}$

• question_answer93) The reaction, $C{{H}_{3}}-\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{C}}\,H-C{{H}_{2}}-O-C{{H}_{2}}C{{H}_{3}}$ $+HI\xrightarrow{\Delta }$? Which of the following compound will be formed?

A) $C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,H-C{{H}_{2}}-I+C{{H}_{3}}C{{H}_{2}}OH$

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

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

D) $C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,H-C{{H}_{2}}OH+C{{H}_{3}}C{{H}_{2}}I$

• question_answer94) Predict the product C obtained in the following reaction of butyne -1. $C{{H}_{3}}C{{H}_{2}}-C\equiv CH+HCl\xrightarrow{{}}B\xrightarrow{HI}C$

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

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

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

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

• question_answer95) Sulphide ores of metals are usually concentrated by froth floatation process. Which one of the following sulphide ores offers an exception and is concentrated by chemical leaching?

A) Argentite

B) Galena

C) Copper pyrite

D) Sphalerite

• question_answer96) The equilibrium constant of the reaction; $Cu(s)+2A{{g}^{+}}(aq)\xrightarrow{{}}C{{u}^{2+}}(aq)+2Ag(s)$${{E}^{o}}=0.46\,V$at 298 K

A) $2.4\times {{10}^{10}}$

B) $2.0\times {{10}^{10}}$

C) $4.0\times {{10}^{10}}$

D) $4.0\times {{10}^{15}}$

• question_answer97) In the preparation of alkene from alcohol using $A{{l}_{2}}{{O}_{3}}$ which is effective factor?

A) Porosity of $A{{l}_{2}}{{O}_{3}}$

B) Temperature

C) Concentration

D) Surface area of Al 20 3

• question_answer98) Which one of the following is correct?

A) On reduction any aldehyde gives secondary alcohol

B) Reaction of vegetable oil with ${{H}_{2}}S{{O}_{4}}$ gives glycerine

C) Alcoholic iodine with $NaOH$ gives iodoform

D) Sucrose on reaction with $NaCl$ gives invert sugar

• question_answer99) Which one of the following is correct about H-bonding in nucleofide?

A) A-T,G-C

B) A-G, T-C

C) G-T/A-C

D) A-A, T-T

• question_answer100) Change in enthalpy for the reaction, $2{{H}_{2}}{{O}_{2}}(l)\xrightarrow{{}}2{{H}_{2}}O(l)+{{O}_{2}}(g)$ if heat of formation of ${{H}_{2}}{{O}_{2}}(l)$ and ${{H}_{2}}O(l)$are - 188 and -286 kJ/mol respectively is

A) -196 kJ/mol

B) +196 kJ/mol

C) +948 kJ/mol

D) -948 kJ/mol

• question_answer101) The biological definition of a species depends on

A) the geographical distribution of two groups of organisms

B) reproductive isolation of two groups of organisms

C) anatomical and development differences between the two groups of organisms

D) difference in the adoptation of two groups of organisms

• question_answer102) Binomial nomenclature of plants was given by

A) Engler

B) Linnaeus

C) Prantl

D) Both [a] and [b]

• question_answer103) Which of the following is not characteristic of Gram positive bacteria?

A) Cell wall is smooth

B) Mesosomes are distinctive prominent

C) Basal body of flagellum contains two rings

D) Murein content of cell wall is 70-80%.

• question_answer104) During conjugation in Paramecium

A) out of the four micronuclei formed, three degenerate

B) out of six macronuclei formed, four degenerate

C) zygote nucleus undergoes eight successive division in each conjugant

D) out of 16 nuclei; only four degenerate

• question_answer105) Which one of the following viruses contains both DNA and RNA?

A) Cyanophage

B) Herpes virus

C) Leuko virus

D) Polio virus

• question_answer106) Oil is reserve food in

A) Chlamydomonas

B) Oedogonium

C) Vaucheria

D) Chara

• question_answer107) In the prothallus of a vascular cryptogam, the antherozoids and eggs mature at different times. As a result

A) there is no change in success rate of fertilization

B) there is high degree of sterility

C) one can conclude that the plant is apomictic

D) self-fertilization is prevented

• question_answer108) In Pinus, male cone bears a large number of

A) ligules

B) anthers

C) microsporophylls

D) megasporophylls

• question_answer109) The canal system is characteristic feature of

A) helminthes

B) coelenterates

C) sponges

D) echinoderms

• question_answer110) The excretory cells,-that are found in Platyhelminthes are

A) protonephridia

B) flame cells

C) solenocytes

D) All of the above

• question_answer111) The pseudocoelomate among these is

A) Porifera

B) Annelida

C) Aschelminthes

D) Mollusca

A) Pila sp

B) Chiton sp

C) Lamellidens sp

• question_answer113) In a plant, the peduncle is elongated and it bears pedicillate flowers. The older flowerslie towards the base and the younger ones near the apex. The growth of the peduncle continues and more flowers are added. The inflorescence is

A) raceme

B) corymb

C) umbel

• question_answer114) Which of these is an example for zygomorhic flower with imbricate aestivation?

A) Calotropis

B) Mustard

C) Canna

D) Cassia

A) seed

B) embryo

C) ovule

D) fruit

• question_answer116) At maturity, the sieve plates become impregnated with

A) cellulose

B) pectin

C) suberin

D) callose

• question_answer117) Duramen is present in

A) inner region of secondary wood

B) part of sapwood

C) outer region of secondary wood

D) region of pericycle

• question_answer118) The type of epithelial cells, which line the Inner surface of fallopian tubes, bronchioles and small bronchi are known as

A) squamous epithelium

B) columnar epithelium

C) ciliated epithelium

D) cubical epithelium

• question_answer119) Largest single mass of lymphatic tissue in the body is

A) lung

B) spleen

C) liver

D) kidney

• question_answer120) The plasmamembrane consists mainly of

A) phospholipids embedded in a protein bilayer

B) proteins embedded in a phospholipid bilayer

C) proteins embedded in a polymer of glucose molecules

D) proteins embedded in a carbohydrate bilayer

• question_answer121) Fluidity of bio-membranes can be shown by

A) electron microscope

B) tissue culture

C) phase-contrast microscope

D) fluorescence microscope

• question_answer122) Synaptonemal complex is formed during

A) pachytene

B) zygotene

C) leptotene

D) diplotene

• question_answer123) Ascent of sap in plants was demonstrated by

A) Girdling experiment

B) Ganongs experiment

C) Went experiment

D) Lever auxanometer

• question_answer124) Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing microorganism?

A) Casuarina equisetifolia

B) Crotalariajuncea

C) Cycasrevoluta

D) Cicer arietinum

• question_answer125) Choose the correct statement.

A) The ${{C}_{4}}$-plants do not have RUBISCO

B) Carboxylation of RuBP leads to the formation of PGA and phosphoglycolate

C) Carboxylation of phosphoenol pyruvate results in the formation of ${{C}_{4}}$-acids

D) Decarboxylation of ${{C}_{4}}$-acids occur in the mesophyll cells

A) It is also called citric acid cycle

B) The intermediate compound, which links glycolysis with Krebs cycle is malic acid

C) It occurs in mitochondria

D) It starts with six carbon compound

• question_answer127) Response of plants due to reversible turgor change in pulvinus is

A) nyctinastic

B) seismonastic

C) heptonastic

D) photonastic

• question_answer128) The bioassay of auxin is

A) Avena curvature test

B) callus formation

C) culture of fungus

D) seed dormancy

• question_answer129) In intestine, food materials are absorbed through

A) villi

B) sub-tentacular cells

C) sub-mucosa

D) gastric glands

• question_answer130) The essential vitamin for blood coagulation is

A) vitamin-${{B}_{6}}$

B) vitamin-A

C) vitamin-K

D) vitamin-E

• question_answer131) Severe Acute Respiratory Syndrome (SARS)

A) is caused by a variant of Pneumococcus pneumoniae

B) is caused by a variant of the common cold virus (corona virus)

C) is an acute form of asthma

D) affects non-vegetarians much faster than vegetarians

• question_answer132) Maximum amount of oxygen is lost from the blood in the

A) capillaries surrounding the tissue cells

B) arteries of the .body

C) capillaries surrounding the alveoli

D) left auricle of the heart

• question_answer133) A person who is on a long hunger strike and is surviving only on water, will have

A) more sodium in his urine

B) less amino acids in his urine

C) more glucose in his blood

D) less urea in his urine

• question_answer134) Bones become fragile in

A) osteoporosis

B) gout

C) arthritis

D) None of these

• question_answer135) Injury to vagus nerve in human is not likely to affect

A) tongue movements

B) gastrointestinal movements

C) pancreatic secretion

D) cardiac movements

• question_answer136) Congenital removal of thyroid will cause

A) myxoedema

B) cretinism

C) Both [a] and [b]

D) exophthalmic goiter

• question_answer137) Which of the following hormones is not a secretory product of human placenta?

B) Prolactin

C) Oestrogen

D) Progesterone

• question_answer138) What does the filiform apparatus do at the entrance into ovule?

A) It helps in the entry of pollen tube into a synergid

B) It prevents entry of more than one pollen tube into the embryo sac

C) It brings about opening of the pollen tube

D) It guides pollen tube from a synergid to egg

A) oogonial cells

B) corpus luteum

C) theca externa and theca interna

D) corpus albicans

• question_answer140) Which one of the following statements about morula in humans is correct?

A) It has almost equal quantity of cytoplasm as an uncleaved zygote but much more DNA

B) It has far less cytoplasm as well as less DNA than in an uncleaved zygote

C) It has more or less equal quantity of cytoplasm and DNA as in uncleaved zygote

D) lt has more cytoplasm and more DNA than an uncleaved zygote

• question_answer141) Incomplete dominance is shown by

A) primrose

B) Mirabilis

C) Helianthus

D) China rose

• question_answer142) During translation initiation in prokaryotes, a GTP molecule is needed in

A) association of 30 S, mRNA with formyl-met-tRNA

B) association of 50 S sub-unit of ribosome with initiation complex

C) formation of formyl-met-tRNA

D) binding of 30 sub-units of ribosome with mRNA

• question_answer143) Thorns of Baugainvillea and tendrils of Cucurbita are examples of

A) analogous organs

B) homologous organs

C) vestigial organs

D) retrogressive evolution

• question_answer144) A good example for organic fertilizer, which improves phosphorus uptake, is

A) VAM fungi

B) Rhizobium

C) Azospirillum

D) None of these

• question_answer145) What is a keystone species?

A) A species which adds up to only a small proportion of the total biomass of a community, yet has a huge impact on the communitys organization and survival

B) A common species that has plenty of biomass, yet has a fairly low impact on the communitys organization

C) A rare species that has minimal impact on the biomass and on other species in the community

D) A dominant species that constitutes a large proportion of the biomass and which affects many other species

• question_answer146) The 10% energy transfer law of food chain was given by

A) Lederberg

B) Lindemann

C) Weismann

D) Lindley

• question_answer147) Soil formed after leaching and rich in Al and Fe is

A) alluvial

B) podsol

C) laterite

D) None of these

• question_answer148) Chipko movement is related to

A) Swaminathan

B) Bahuguna

C) Odum

D) Misra

• question_answer149) Ozone layer is being destroyed by

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

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

C) CFCs

D) photochemical smog

• question_answer150) The protein products of the following Bt toxin genes cry I Ac and cry II Ab are responsible for controlling

A) Bollworm

B) roundworm

C) Moth

D) fruit fly