# Solved papers for BCECE Medical BCECE Medical Solved Papers-2014

### done BCECE Medical Solved Papers-2014

• question_answer1) Two quantities X and Y have different dimensions. Which mathematical operation given below is physically meaningful?

A) $X+Y$

B) $X-Y$

C) $\frac{X}{Y}$

D) None of these

• question_answer2) If $A=3\hat{i}+4\hat{j}$ and $B=7\hat{i}+24\hat{j}$, then the vector having the same magnitude as Band parallel to A is

A) $15\hat{i}+20\hat{j}$

B) $5\hat{i}-3\hat{j}$

C) $15\hat{i}+13\hat{j}$

D) $5\hat{i}+14\hat{j}$

• question_answer3) The gravitational field due to a mass distribution is $E=\frac{k}{{{x}^{3}}}$ in the $x$-direction, where k is a constant. The value of gravitational potential at a distance x is [Taking gravitational potential to be zero at infinity]

A) $\frac{k}{x}$

B) $\frac{k}{{{x}^{3}}}$

C) $\frac{k}{2{{x}^{2}}}$

D) $\frac{k}{3{{x}^{3}}}$

• question_answer4) Two water pipes of diameters 2 cm and 4 cm are connected with the main supply line. If velocity of flow of water in the pipe of 4 cm diameter is X, then velocity in 2 cm diameter is

A) $2\,X$

B) $4\,X$

C) $6\,X$

D) $8\,X$

• question_answer5) Water rises to a height h in a capillary on the surface of the earth in stationary condition. Value of h increases, if this tube is taken

A) on poles

B) on sun

C) in a lift going upward with acceleration

D) in a Sift going downward with acceleration

• question_answer6) Two sound waves having a phase difference of${{60}^{o}}$, have a path difference of

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

B) $\frac{\lambda }{6}$

C) $\frac{\lambda }{9}$

D) $\lambda$

• question_answer7) Propagation of sound waves in air is an example of

A) isothermal process

B) isobaric process

D) isochoric process

• question_answer8) A small laboratory telescope has an objective lens of focal length 140 cm and an eye-piece of focal length 6 cm. Then, separation between the objective and eye-piece is

A) 140 cm

B) 24 cm

C) 156 cm

D) 146 cm

• question_answer9) The ratio of the peak current through the capacitor and supply is known as

A) resonance current

B) dynamic resistance

C) Q- factor

D) None of the above

• question_answer10) For the given circuit diagram, the equivalent resistance across battery is

A) $5\,\,\Omega$

B) $10\,\,\Omega$

C) $20\,\Omega$

D) $15\,\,\Omega$

• question_answer11) The specific resistance of a wire is $\rho$, its volume is $3{{m}^{3}}$ and its resistance is $3\,\,\Omega$, then its length will be

A) $\frac{3}{\sqrt{\rho }}$

B) $\frac{\sqrt{3}}{\rho }$

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

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

• question_answer12) A radio transmitter radiates 1 kW power at a wavelength 198.6 m. How many photons does it emit per second?

A) ${{10}^{10}}$

B) ${{10}^{20}}$

C) ${{10}^{30}}$

D) ${{10}^{40}}$

• question_answer13) For an L-R circuit, the inductive reactance is equal to the resistance R of the circuit. An emf $E={{E}_{0}}\cos \,\,(\omega \,t)$ is applied to the circuit. Then, the power consumed in the circuit is

A) $\frac{{{E}_{0}}}{R}$

B) $\frac{E_{0}^{2}}{4R}$

C) $\frac{4R}{{{E}_{0}}}$

D) $\frac{R}{{{E}_{0}}}$

• question_answer14) The following truth table corresponds to the logic gate

 A B Y 0 0 0 0 1 1 1 0 1 1 1 1

A) NAND

B) AND

C) XOR

D) OR

• question_answer15) The corresponding truth table for the function Z of X and Y represented by given figure is

A)

B)

C)

D) None of these

• question_answer16) Thermal conductivity of a material in CGS system is 0.4. In steady state, the rate of flow of heat is 10$cal/s-c{{m}^{2}}$. The thermal gradient will be

A) ${{5}^{o}}C/cm$

B) ${{15}^{o}}C/cm$

C) ${{25}^{o}}C/cm$

D) ${{50}^{o}}C/cm$

• question_answer17) Shape of graph between speed and kinetic energy of the body is

A) hyperbola

B) straight line

C) parabola

D) circle

• question_answer18) For a common emitter circuit amplifier, the load resistance of the output circuit is 500 times the resistance of the input circuit. If $\alpha =0.98$, then, current gain is

A) 0.98

B) 50

C) 98

D) 49

• question_answer19) A water pump of power 2kW is installed in a home. Then, the amount of water (in litres) it can raise in one minute to a height of 10m is [Take $g=10\,m/{{s}^{2}}$]

A) 200L

B) 1200L

C) 800L

D) 350L

• question_answer20) For the given circuit of p-n junction, the potential barrier is

A) raised

B) lowered

C) remains same

D) data insufficient

• question_answer21) A man fires a large number of bullets in all directions with same speed $\upsilon$. The maximum area on the ground on which these bullets will spread is

A) $\frac{\pi {{v}^{2}}}{g}$

B) $\frac{{{v}^{2}}}{{{g}^{2}}}$

C) $\frac{\pi {{v}^{4}}}{{{g}^{2}}}$

D) $\frac{{{v}^{4}}}{{{g}^{2}}}$

• question_answer22) Shaft of a motor rotates at a constant angular velocity of3000rpm. The radians it has turned through in 1 s is

A) $\pi$

B) $10\,\,\pi$

C) $50\,\,\pi$

D) $100\,\,\pi$

• question_answer23) Motion of planets in solar system is an example of conservation of

A) momentum

B) velocity

C) angular momentum

D) energy

• question_answer24) The radii of two planets are respectively ${{R}_{1}}$ and ${{R}_{2}}$ and their densities are ${{\rho }_{1}}$ and ${{\rho }_{2}}$. Ratio of the accelerations due to gravity at their surfaces is

A) $\frac{{{R}_{1}}}{{{R}_{2}}}.\frac{{{\rho }_{1}}}{{{\rho }_{2}}}$

B) $\frac{{{R}_{2}}}{{{R}_{1}}}.\frac{\rho _{1}^{2}}{{{\rho }_{2}}}$

C) $\frac{{{R}_{1}}}{{{R}_{2}}}.\frac{{{\rho }_{2}}}{\rho _{1}^{2}}$

D) 1 : 1

• question_answer25) A tank is filled with water. There is a hole in the bottom. At the bottom total pressure is 3 aim (1 aim$={{10}^{5}}N/{{m}^{2}}$), then, the velocity of water flowing from hole is

A) 10 m/s

B) 20 m/s

C) 15 m/s

D) 25 m/s

• question_answer26) A horizontal overhead power line carries a current of 90A in east to west direction. Magnitude of magnetic field due to the current 1.5 m below the line is

A) $1.2\,T$

B) $1.2\,\times {{10}^{-10}}T$

C) $0T$

D) $1.2\times {{10}^{-5}}T$

• question_answer27) Find the difference of air pressure between the inside and outside of a soap bubble 5 mm in diameter, if the surface tension is 1.6 N/m.

A) 2560 $N/{{m}^{2}}$

B) 3720 $N/{{m}^{2}}$

C) 1208 $N/{{m}^{2}}$

D) 950 $N/{{m}^{2}}$

• question_answer28) Impulse of a force is equal to the change in

A) mass

B) velocity

C) momentum

D) energy

• question_answer29) A particle moves through angular displacement $\theta$ on a circular path of radius r. The linear displacement will be

A) $2\,\,r\sin \left( \frac{\theta }{2} \right)$

B) $2\,\,r\cos \left( \frac{\theta }{2} \right)$

C) $2\,\,r\tan \left( \frac{\theta }{2} \right)$

D) $2\,\,r\cot \left( \frac{\theta }{2} \right)$

• question_answer30) An electron and a photon have equal energy${{E}_{K}}$. Then, the ratio of wavelengths of photon and electron is $\left( \frac{{{\lambda }_{photon}}}{{{\lambda }_{electron}}} \right)$

A) $\frac{\sqrt{{{E}_{K}}}}{2}$

B) $\frac{1}{\sqrt{2{{E}_{K}}}}$

C) $\frac{1}{\sqrt{{{E}_{K}}}}$

D) $\frac{\sqrt{3{{E}_{K}}}}{2}$

• question_answer31) In a transistor, forward bias is always smaller than the reverse bias. This is done to

A) maintain constant current supply

B) get good output

C) avoid excessive heating of transistor

D) maintain flow of majority charge carriers

• question_answer32) Light with an energy flux of 18 $W/c{{m}^{2}}$ falls on a non-reflecting surface at normal incidence. The surface has an area of 20 $c{{m}^{2}}$, then the total momentum delivered on the surface during a span of 30 min is

A) $2.16\times {{10}^{-3}}kg-m/s$

B) $1.52\times {{10}^{-5}}kg-m/s$

C) $8.31\times {{10}^{-8}}kg-m/s$

D) $18.2\times {{10}^{-6}}kg-m/s$

• question_answer33) The Youngs modulus of a wire of length L and radius r is $Y\,N/{{m}^{2}}$. The length and radius are reduced to $\frac{L}{6}$ and $\frac{r}{6}$, then its Youngs modulus is

A) 6 Y

B) $\frac{Y}{6}$

C) Y

D) 3Y

• question_answer34) In a circular coil (1) of radius R, current I is flowing and in another coil (2) of radius 2R a current $2I$ is flowing, then the ratio of the magnetic fields produced by the two coils is

A) 1 : 1

B) 1 : 2

C) 2 : 1

D) 3 : 1

• question_answer35) Which of the following statement is true for relative magnetic permeability?

A) It is dimensionless

B) It is unit less

C) Its value is greater than 1000 for iron

D) All of the above

• question_answer36) When the self-inductance of the primary and secondary coil is doubled, then the mutual inductance of the two coils is

A) halved

B) doubled

D) reduced to one-fourth

• question_answer37) In a semiconductor diode, the forward voltage is changed from 0.5 V to 0.7 V, then the forward current changes by 1mA. The forward resistance of the diode junction is

A) $100\,\,\Omega$

B) $50\,\,\Omega$

C) $200\,\,\Omega$

D) $250\,\,\Omega$

• question_answer38) Moment of inertia of wheel about the axis of rotation is 3 MKS units. Its kinetic energy will be 600 J, if period of rotation is (in seconds)

A) $\pi$

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

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

D) $2\pi$

• question_answer39) A galvanometer has a coil resistance of 100 Q. It gives a full scale deflection when a current of 1mA is passed through it. The value of resistance which can convert the galvanometer into an ammeter giving full scale deflection for a current of 10 A is

A) ${{10}^{-4}}\,\Omega$

B) ${{10}^{-2}}\,\Omega$

C) ${{10}^{4}}\,\Omega$

D) ${{10}^{2}}\,\Omega$

• question_answer40) A siren emits sound of frequency 1000 Hz, it moves away from the observer towards a cliff with a speed of $10\,\,m{{s}^{-1}}$. Then, the frequency of sound heard by observer coming directly from the siren is

A) less than 1000 Hz

B) greater than 1000 Hz

C) equal to 1000 Hz

D) no sound is heard

• question_answer41) One surface of a lens is convex and the other is concave. If the radii of curvatures are ${{R}_{1}}$ and ${{R}_{2}}$ then the lens will be convex, if

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

B) ${{R}_{1}}>{{R}_{2}}$

C) ${{R}_{1}}={{R}_{2}}$

D) None of these

• question_answer42) A convex mirror of radius of curvature 1.6 m has an object placed at a distance of 1m from it. The image is formed at a distance of

A) $\frac{18}{3}$m behind the mirror

B) $\frac{18}{3}$ m infront of the mirror

C) $\frac{4}{9}$m behind the mirror

D) $\frac{4}{9}$m infront of the mirror

• question_answer43) When a radioactive isotope $_{88}{{R}^{228}}$ decays in series by the emission of $3\alpha$-particles and $\beta$-particles, the mass number of the isotope finally formed is

A) 83

B) 72

C) 216

D) 228

• question_answer44) As shown in the experimental setup, two cells with the same emf E and different internal resistance ${{r}_{1}}$ and ${{r}_{2}}$ are connected in series to an external resistance R Value of R so that the potential difference across the first cell be zero; is

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

B) $\frac{{{r}_{1}}}{{{r}_{2}}}$

C) ${{r}_{1}}-{{r}_{2}}$

D) ${{r}_{1}}\,\,{{r}_{2}}$

• question_answer45) Two radioactive sources X and Y of half lives 1 h and 2 h respectively initially contain the same number of radioactive atoms. At the end of 2 h, their rates of disintegration are in the ratio of

A) 4 : 3

B) 3 : 4

C) 1 : 2

D) 2 : 1

• question_answer46) A photon will have less energy, if its

A) wavelength is longer

B) wavelength is shorter

C) amplitude is less

D) data insufficient

• question_answer47) The current gain of a transistor in a common base arrangement is 0.98. The change in collector current corresponding to a change of 5 mA in emitter current is

A) 0.1 mA

B) 0.2 mA

C) 4.9 mA

D) 9.2 mA

• question_answer48) A plano-convex lens has a curved surface of radius of curvature R and refractive index $\mu$. If its plane surface is silvered, then, it behaves as a

A) convex lens

B) convex mirror

C) concave lens

D) concave mirror

• question_answer49) An electric bulb is made of tungsten filament of resistance $R\,\,\Omega$. It is marked 100W and 230 V. Then, the value of R is

A) $300\,\,\Omega$

B) $529\,\,\Omega$

C) $739\,\,\Omega$

D) $100\,\,\Omega$

• question_answer50) Which of the following are the properties of fuse, wire?

A) Made of alloy of tin

B) Has a low melting point

C) Connected in series with main supply

D) All of the above

• question_answer51) The site of action of insulin is

A) mitochondria

B) nucleus

C) plasma membrane

D) DNA

• question_answer52) The wave number of the spectral line in the emission spectrum of hydrogen will be equal to $\frac{8}{9}$ times the Rydbergs constant if the electron jumps from

A) $n=3$ to $n=1$

B) $n=10$ to $n=1$

C) $n=9$ to $n=1$

D) $n=2$ to $n=1$

• question_answer53) Which one of the following is an artificial sweetening agent?

A)

B)

C)

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

• question_answer54) Nitrobenzene on reduction using zinc in alkaline medium results in X. The number of sigma [a] and pi [n] bonds in X is

A) $24\sigma ,\,7\pi$

B) $24\sigma ,\,6\pi$

C) $27\sigma ,\,7\pi$

D) $27\sigma ,\,6\pi$

 (i) has five completely filled antibonding molecular orbitals (ii) is diamagnetic (iii) has bond order one (iv) is isoelectronic with neon
Which one of these is correct?

A) (ii) and (in)

B) (i), (ii) and (iv)

C) (i), (ii) and (iii)

D) (i) and (iv)

• question_answer56) Which one of the following conversions involve change in both hybridisation and shape?

A) $C{{H}_{4}}\xrightarrow{{}}{{C}_{2}}{{H}_{6}}$

B) $N{{H}_{3}}\xrightarrow{{}}NH_{4}^{+}$

C) $B{{F}_{3}}\xrightarrow{{}}BF_{4}^{-}$

D) ${{H}_{2}}O\xrightarrow{{}}{{H}_{3}}{{O}^{+}}$

• question_answer57) In chromite ore, the oxidation number of iron, and chromium are respectively

A) +3,+2

B) +3,+6

C) +2, + 6

D) +2, + 3

• question_answer58) Identify A and B in the following reactions

A)

B)

C)

D)

• question_answer59) Compound A $({{C}_{3}}{{H}_{6}}O)$ undergoes following reactions to form B and C. Identify A, B and C. $\underset{\begin{smallmatrix} \\ A \end{smallmatrix}}{\mathop{C\xleftarrow{Zn-Hg/HCl}}}\,\underset{B}{\mathop{{{C}_{3}}\underset{A}{\mathop{{{H}_{6}}}}\,O}}\,\underset{\begin{smallmatrix} \\ C \end{smallmatrix}}{\mathop{\xrightarrow{{{I}_{2}}/NaOH}V}}\,$

A) ${{H}_{3}}C-\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}CH{{l}_{3}}CH-C{{H}_{2}}-C{{H}_{3}}$

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

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

D) ${{H}_{3}}C-\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\,\,\,\,\,CH{{l}_{3}}\,\,\,\,\,\,{{H}_{3}}C-\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{C}}\,H-C{{H}_{3}}$

• question_answer60) Which one of the following equations represents the variation of viscosity coefficient $(\eta )$ with temperature (T)?

A) $\eta =A{{e}^{-E/RT}}$

B) $\eta =A{{e}^{E/RT}}$

C) $\eta =A{{e}^{-E/kT}}$

D) $\eta =A{{e}^{-E/T}}$

• question_answer61) Which property among the following is same for both hydrogen and deuterium molecules?

A) Bond energy

B) Melting point

C) Boiling point

D) Bond length

• question_answer62) Given that $dE=TdS-pdV$ and $H=E+pV$. Which one of the following relations is true?

A) $dH=TdS-Vdp$

B) $dH=SdT+Vdp$

C) $dH=-SdT-Vdp$

D) $dH=dE-pdV$

• question_answer63) What is the bond angle in $Cl{{O}_{2}}(OClO)$?

A) ${{90}^{o}}$

B) ${{118}^{o}}$

C) ${{105}^{o}}$

D) ${{111}^{o}}$

• question_answer64) A system is allowed to move from state A to B following path ACB by absorbing 80 J of heat energy. The work done by the system is 30 J. The work done by the system in reaching state B from A is 10 J through path ADB. Which statements are correct?

 I. Increase in internal energy from state A to state B is 50 J. II. If path ADB is followed to reach state B,$\Delta E=50\,J$. III. If work done by the system in path AB is 20 J, the heat absorbed during path AB = 70 J. IV. The value ${{E}_{C}}-{{E}_{A}}$ is equal to ${{E}_{D}}-{{E}_{B}}$. V. Heat absorbed by the system to reach B from A through path ADB is 60 J.

A) l, V

B) l, III, V

C) I, II. Ill, V

D) l, IV, V

• question_answer65) Identify the order in which the spin only magnetic moment (in BM) increases for the following four ions

 I. $F{{e}^{2+}}$ II. $T{{i}^{2+}}$ III. $C{{u}^{2+}}$ IV. ${{V}^{2+}}$

A) I. II, IV, III

B) IV, 1. II, III -

C) III. IV, I, II

D) lll, II, IV, I

• question_answer66) Which one of the following statements is not correct?

A) Moissan boron is amorphous

B) The reaction between boron and concentrated $HN{{O}_{3}}$ gives ${{N}_{2}}O$

C) Amorphous boron on heating with oxygen forms ${{B}_{2}}{{O}_{3}}$

D) Boron is a non-conductor of electricity

• question_answer67) In photoelectric effect, if the energy required to overcome the attractive forces on the electron, (work functions) of Li, Na and Rb are 2.41 eV, 2.30 eV and 2.09 eV respectively, the work function of K could approximately be in eV.

A) 2.52

B) 2.20

C) 2.35

D) 2.01

• question_answer68) The oxoacid of sulphur which contains two sulphur atoms in different oxidation states is

A) pyrosulphurous acid

B) hyposulphurous acid

C) pyrosulphuric acid

D) persulphuric acid

• question_answer69) The correct sequence of reactions to convert p-nitrophenol into quinol involves

A) reduction, diazotization and hydrolysis

B) hydrolysis, diazotization and reduction

C) hydrolysis, reduction and diazotization

D) diazotization, reduction and hydrolysis

• question_answer70) The compound obtained when acetaldehyde reacts with dilute aqueous sodium hydroxide exhibits

A) geometrical isomerism

B) optical isomerism

C) neither optical nor geometrical isomerism

D) both optical and geometrical isomerism

• question_answer71) An oxygen containing organic compound upon oxidation forms a carboxylic acid as the only organic product with its molecular mass higher by 14 units. The organic compound is

A) an aldehyde

B) a primary alcohol

C) a secondary alcohol

D) acetone

• question_answer72) A buffer solution contains 0.1 mole of sodium acetate in $1000\,\,c{{m}^{3}}$ of 0.1 M acetic acid. To the above buffer solution, 0.1 mole of sodium acetate is further added and dissolved. The pH of the resulting buffer is equal to

A) $p{{K}_{a}}-\log 2$

B) $p{{K}_{a}}$

C) $p{{K}_{a}}+2$

D) $p{{K}_{a}}+\log 2$

• question_answer73) Which one of the following is wrongly matched?

A) ${{[Cu{{(N{{H}_{3}})}_{4}}]}^{2+}}$ - Square planar

B) $[Ni{{(CO)}_{4}}]$ - Neutral ligand

C) $[Fe(CN)_{6}^{3-}]$ - $s{{p}^{3}}{{d}^{2}}$

D) ${{[Co{{(en)}_{3}}]}^{3+}}$ - Follows EAN rule

• question_answer74) The activation energy for a reaction at the temperature T K was found to be$2.303\,\,RT\,\,J\,mo{{l}^{-1}}$. The ratio of the rate constant to Arrhenius factor is

A) ${{10}^{-1}}$

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

C) $2\times {{10}^{-3}}$

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

 Column - I Column - II [a] Potential of hydrogen electrode at pH = 10 (i) 0.76 V [b] $C{{u}^{2+}}\left| Cu \right.$ (ii) 0.059 [c] $Zn\left| Z{{n}^{2+}} \right.$ (iii) -0.591V [d] $\frac{2.303\,\,RT}{F}$ (iv) 0.337 V (v) -0.76V

A) A- (III) B-(I) C-(II) D- (V)

B) A-(II) B- (V) C-(I) D-(IV)

C) A-(III) B-(IV) C-(I) D-(II)

D) A- (V) B-(I) C-(IV) D-(II)

• question_answer76) The formal charges of ${{N}_{(1)}},\,{{N}_{(2)}}$ and O atoms in$_{\bullet }^{\bullet }\overset{\bullet \,\bullet }{\mathop{\underset{1}{\mathop{N}}\,}}\,=\underset{2}{\mathop{N}}\,=\overset{\bullet \bullet }{\mathop{O}}\,_{\bullet }^{\bullet }$ are respectively

A) +1,-1. 0

B) -1,+1, 0

C) +1,+1.0

D) -1.-1,0 .

• question_answer77) 1 g of silver gets distributed between $10\,\,c{{m}^{3}}$ of molten zinc and $100\,\,c{{m}^{3}}$ of molten lead at${{800}^{o}}C$. The percentage of silver in the zinc layer is approximately

A) 89

B) 91

C) 97

D) 94

• question_answer78) Carbon can reduce ferric oxide to iron at a temperature above 983 K because

A) carbon monoxide formed is thermodynamically less stable than ferric oxide

B) carbon has a higher affinity towards oxidation than iron

C) free energy change for the formation of carbon dioxide is less negative than that for ferric oxide

D) iron has a higher affinity towards oxygen than carbon

• question_answer79) Which one of the following is the ratio of the lowering of vapour pressure of 0.1 M aqueous solutions of $BaC{{l}_{2}},\,\,NaCl$ and $A{{l}_{2}}{{(S{{O}_{4}})}_{3}}$ respectively?

A) 3 : 2; 5

B) 5 : 2 : 3

C) 5 : 3 : 2

D) 2 : 3 : 5

• question_answer80) In which one of the following, does the given amount of chlorine exert the least pressure in a vessel of capacity $1\,\,d{{m}^{3}}$ at 273 K?

A) 0.0355 g

B) 0.071 g

C) $6.023\times {{10}^{21}}$ molecules

D) 0.02 mol

• question_answer81) 19 g of a mixture containing $NaHC{{O}_{3}}$ and $NaC{{O}_{3}}$ on complete heating liberated 1.12 L of $C{{O}_{2}}$ at STP. The weight of the remaining solid was 15.9 g. What is the weight (in g) of $N{{a}_{2}}C{{O}_{3}}$ in the mixture before heating?

A) 8.4

B) 15.9

C) 4.0

D) 10.6

 Column - I Column - II [a] Acetaldehyde, vinyl alcohol 1. Enantiomers [b] Eclipsed and staggered ethane 2. Tautomers [c] (+)2-butanol, (-)2-butanol 3. Chain isomers [d] Methyl-n-propylamine and diethylamine 4. Conformational isomers 5. Metamers

A)      A-1      B-4      C-3       D-5

B)      A-2      B-4      C-1       D-5

C)      A-5      B-1       C-4        D-2

D)       A-5     B-1      C-3       D-2

• question_answer83) With respect to chlorobenzene, which of the following statements is not correct?

A) $Cl$ is ortho/para directing

B) $Cl$ exhibits +M effect

C) $Cl$ is ring deactivating

D) $Cl$ is meta directing

• question_answer84) The product(s) formed when ${{H}_{2}}{{O}_{2}}$ reacts with disodium hydrogen phosphate is

A) ${{P}_{2}}{{O}_{5}}\,\,.\,N{{a}_{3}}P{{O}_{4}}$

B) $N{{a}_{2}}HP{{O}_{5}}\,\,.\,{{H}_{2}}{{O}_{2}}$

C) $Na{{H}_{2}}P{{O}_{4}},\,\,\,{{H}_{2}}O$

D) $N{{a}_{2}}HP{{O}_{4}}\,\,.\,{{H}_{2}}O$

• question_answer85) The correct sequence of steps involved in the mechanism of Cannizzaros reaction is

A) nucleophilic attack, transfer of ${{H}^{-}}$ and transfer of ${{H}^{+}}$

B) transfer of ${{H}^{-}}$, transfer of ${{H}^{+}}$ and nucleophiiic attack

C) transfer of${{H}^{+}}$, nucleophilic attack and transfer of${{H}^{-}}$

D) electrophilic attack by $O{{H}^{-}}$, transfer of ${{H}^{+}}$ and transfer of ${{H}^{-}}$

• question_answer86) What is Z in the following reactions? $BC{{l}_{3}}+{{H}_{2}}\xrightarrow[{{450}^{o}}C]{Cu-Al}X+HCl$ $X\xrightarrow{methylation}Z$

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

B) ${{(C{{H}_{3}})}_{4}}{{B}_{2}}{{H}_{2}}$

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

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

• question_answer87) The empirical formula of a non-electrolyte is$C{{H}_{2}}O$. A solution containing 6g of the compound exerts the same osmotic pressure as that of 0.05 M glucose solution at the same temperature. The molecular formula of the compound is

A) ${{C}_{2}}{{H}_{4}}{{O}_{2}}$

B) ${{C}_{3}}{{H}_{6}}{{O}_{3}}$

C) ${{C}_{5}}{{H}_{10}}{{O}_{5}}$

D) ${{C}_{4}}{{H}_{8}}{{O}_{4}}$

• question_answer88) ${{E}_{1}},\,{{E}_{2}},\,{{E}_{3}}$ are the emf values of the three galvanic cells respectively. (i) $Zn|Zn_{1M}^{2+}||Cu_{0.1M}^{2+}|Cu$ (ii) $Zn|Zn_{1M}^{2+}||Cu_{1M}^{2+}|Cu$ (iii) $Zn|Zn_{0.1M}^{2+}||Cu_{1M}^{2+}|Cu$ Which one of the following is true?

A) ${{E}_{2}}>{{E}_{3}}>{{E}_{1}}$

B) ${{E}_{3}}>{{E}_{2}}>{{E}_{1}}$

C) ${{E}_{1}}>{{E}_{2}}>{{E}_{3}}$

D) ${{E}_{1}}>{{E}_{3}}>{{E}_{2}}$

• question_answer89) In Kjeldahls method, ammonia from 5 g of food neutralizes $30\,\,c{{m}^{3}}$ of 0.1 N acid. The percentage of nitrogen in the food is

A) 0.84

B) 8.4

C) 16.8

D) 1.68

• question_answer90) Which one of the following has the most nucleophilic nitrogen?

A)

B)

C)

D)

• question_answer91) $C{{H}_{3}}C{{H}_{2}}Br\xrightarrow[\Delta ]{aq.\,\,KOH}A\xrightarrow[\Delta ]{KMn{{O}_{4}}/{{H}^{+}}}$ $B\xrightarrow[\Delta ]{N{{H}_{3}}}C\xrightarrow[alkali]{B{{r}_{2}}}D,\,\,D$ is

A) $C{{H}_{3}}Br$

B) $C{{H}_{3}}CON{{H}_{2}}$

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

D) $CHB{{r}_{3}}$

• question_answer92) The enthalpy changes for the following processes are listed below

 $C{{l}_{2}}(g)\xrightarrow{{}}2Cl(g),\,\,242.3\,kJ\,\,mo{{l}^{-1}}$ ${{I}_{2}}(g)\xrightarrow{{}}2I(g),\,\,151.0\,\,kJ\,\,mo{{l}^{-1}}$ $ICI(g)\xrightarrow{{}}I(g)+Cl(g),\,211.3\,\,kJ\,\,mo{{l}^{-1}}$ ${{I}_{2}}(s)\xrightarrow{{}}{{I}_{2}}(g),\,\,62.76\,\,kJ\,\,mo{{l}^{-1}}$
Given that the standard states for iodine and chlorine are ${{I}_{2}}(s)$ and $C{{l}_{2}}(g)$, the standard enthalpy for the formation of $ICl(g)$ is

A) $-14.6\,\,kJ\,\,mo{{l}^{-1}}$

B) $-16.8\,\,kJ\,\,mo{{l}^{-1}}$

C) $+16.8\,\,kJ\,\,mo{{l}^{-1}}$

D) $+244.8\,\,kJ\,\,mo{{l}^{-1}}$

• question_answer93) 2.5 mL of $\frac{2}{5}\,M$ weak monoacidic base (${{K}_{b}}=1\times {{10}^{-12}}$ at ${{25}^{o}}C$) is titrated with $\frac{2}{15}M\,HCl$ in water at ${{25}^{o}}C$. The concentration of ${{H}^{+}}$at equivalence point is (${{K}_{w}}=1\times {{10}^{-14}}$ at ${{25}^{o}}C$)

A) $3.7\times {{10}^{-13}}M$

B) $3.2\times {{10}^{-7}}M$

C) $3.2\times {{10}^{-2}}M$

D) $2.7\times {{10}^{-2}}M$

• question_answer94) Three reactions involving ${{H}_{2}}PO_{4}^{-}$ are given below

 I. ${{H}_{3}}P{{O}_{4}}+{{H}_{2}}O\xrightarrow{{}}{{H}_{3}}{{O}^{+}}+{{H}_{2}}PO_{4}^{-}$ II. ${{H}_{3}}PO_{4}^{-}+{{H}_{2}}O\xrightarrow{{}}HPO_{4}^{2-}+{{H}_{3}}{{O}^{+}}$ III. ${{H}_{3}}PO_{4}^{-}+O{{H}^{-}}\xrightarrow{{}}{{H}_{3}}P{{O}_{4}}+{{O}^{2-}}$
In which of the above does ${{H}_{2}}PO_{4}^{-}$ act as an acid?

A) II only

B) I and II

C) III only

D) I only

• question_answer95) The correct IUPAC name of tartaric acid is

A) 1, 4-dicarboxy-2, 3-dihydroxyethane

B) $\alpha ,\,\,\alpha$-dihydroxybutane-1, 4-dioic acid

C) 1, 4-dihydroxybutane-2, 3-dioic acid

D) 2, 3-dihydroxybutane-1, 4-dioic acid

 I. $\phi -\overset{\oplus }{\mathop{\underset{\begin{smallmatrix} | \\ \phi \end{smallmatrix}}{\mathop{C}}\,}}\,-\phi$ II. $\phi -\overset{\oplus }{\mathop{C}}\,{{H}_{2}}$ III. $C{{H}_{2}}=CH-\overset{\oplus }{\mathop{C}}\,{{H}_{2}}$ IV.
Correct order of stability is

A) I > IV > II > III

B) I > II > III > IV

C) I > II > IV > III

D) I > III > IV > II

• question_answer97) Match the Column I and II and pick the correct matching from the codes given below.

 Column - I Column - II [a] Polycyclic aromatic hydrocarbons 1. Global warming [b] Dioxins 2. Photochemical [c] IR active molecules 3. Carcinogens [d] Peroxy acetyl nitrate Codes 4. Waste incineration

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

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

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

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

• question_answer98) Consider the following statements.

 I. $La{{(OH)}_{3}}$ is the least basic among hydroxides of lanthanides. II. $Z{{r}^{4+}}$ and $H{{f}^{4+}}$ possess almost the same ionic radii. III. $C{{e}^{4+}}$ can act as an oxidising agent.
Which of the above is/are true?

A) I and III

B) II and III

C) II only

D) I and II

• question_answer99) Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The explanation for it is that

A) concentrated hydrochloric acid emits strongly smelling $HCl$ gas all the time

B) oxygen in air reacts with the emitted $HCl$gas to form a could of chlorine gas

C) strong affinity of $HCl$ gas for moisture in air results in forming of droplets of liquid solution which appears like a cloudy smoke

D) due to strong affinity for water, concentrated hydrochloric acid pulls moisture of air towards itself. This moisture forms droplets of water and hence, the cloud.

• question_answer100) Compartments A and B have the following combinations solution

 A B I. $0.1\text{ }M\,KCl$ $0.2\text{ }M\,KCl$ II. $~0.1%\,(m/V)\,NaCl$ $10%\,(m/V)\,NaCl$ III. $18\,g{{L}^{-1}}glucose$ $34.2\text{ }g{{L}^{-1}}\text{ }sucrose$ IV. $20%\text{ (}m/V)\,glucose$ $10%\text{ (}m/V)\,glucose$
Indicate the number of solutions which is/are isotonic

A) I only

B) III only

C) IV only

D) II only

• question_answer101) Giant chromosomes are found inside

A) nucleus of man

B) oocytes of frog

C) salivary glands of silk moth

D) salivary glands of Drosophila

• question_answer102) Hormone that promotes cell division, protein synthesis and bone growth is

B) ACTH

C) PTH

D) GH

• question_answer103) Blastula of frog has

A) blastopore

B) blastocoel

C) archenteron

D) gastropore

• question_answer104) Haemocoel is found in

A) Hydra and Aurelia

B) Taenia and Ascaris

C) Cockroach and Pila

D) Balanoglossus and Herdmania

• question_answer105) The excretory material of bony fish is

A) urea

B) protein

C) ammonia

D) amino acid

• question_answer106) RNA and proteins are formed in

A) ${{G}_{1}}$-phase

B) ${{G}_{2}}$-phase

C) S-phase

D) ${{G}_{0}}$-phase

• question_answer107) Growth promoting hormone is

A) IAA

B) Gibberellin

C) 2,4-D

D) ABA

• question_answer108) Transduction in bacteria was discovered by

A) 0Zinder and Lederberg

B) Wallace and Jacob

C) Herelle and Twort

D) Lederberg and Tatum

A) anaerobic respiration

B) incomplete oxidation of carbohydrate

C) complete oxidation of carbohydrate

D) None of the above

• question_answer110) Both sickle cell anaemia and Huntingtons chorea are

A) bacteria related diseases

B) congenital disorders

C) pollutant induced disorders

D) virus related diseases

• question_answer111) In the case of humans, the placenta comprises which of the following?

A) Endothelium of maternal blood capillaries

B) Endothelium of foetal blood capillaries

C) Foetal epithelium

D) Connective tissue surrounding foetal blood capillaries

• question_answer112) Golgi apparatus is absent in

A) higher plant

B) yeast

C) bacteria and blue-green algae

D) liver cells

• question_answer113) A chemical substance produced by a microorganism for inhibiting the growth of another is

A) antibody

B) antibiotic

C) aflatoxin

D) antiallergic

• question_answer114) The largest phase of meiosis-I is

A) prophase-1

B) metaphase-1

C) anaphase-1

D) telophase-1

A) releases energy

B) requires energy

C) produces ATP .

D) produces a toxic substance

• question_answer116) Replication of centriole occurs during

A) interphase

B) prophase

C) late prophase

D) late telophase

• question_answer117) Bowmans glands are found in

A) olfactory epithelium

B) external auditory canal

C) cortical nephrons only

D) juxtamedullary nephrons

• question_answer118) Theory of pangenesis was given by

A) Darwin

B) Lamarck

C) Hugo de Vries

D) Oparin.

• question_answer119) Which of the following is the most primitive ancestor of man?

A) Homo neanderthalensis

B) Homo habilis

C) Ramapithecus

D) Australopithecus

• question_answer120) Placenta present in mammals acts as an endocrine tissue and produces

B) oestrogen

C) progesterone

D) testosterone

A) carnivore

B) herbivore

C) Both [a] and [b]

D) sanguirore

• question_answer122) Which of the following is an algal parasite?

A) Volvox

B) Ulothrix

C) Porphyra

D) Cephaleuros

A) hippurin

B) myoglobin

C) histamine

D) haemoglobin

• question_answer124) The leucocytes contain which of the following in large quantity?

A) Basophils

B) Neutrophils

C) Eosinophils

D) Monocytes

• question_answer125) People living at sea level have around 5 million RBC per cubic millimetre of their blood whereas those living at an altitude of 5400 m have around 8 million. This is because at high altitude

A) people get pollution free air to breathe and more oxygen is available

B) atmospheric oxygen level is less and hence, more RBCs are needed to absorb the required amount 3 of oxygen to survive

C) there is more UV radiation which enhances RBC production

D) people eat more nutritive food, therefore more RBCs are formed

• question_answer126) Pneumatophores are present in

A) xerophytes

B) hygrophytes

C) mesophytes

D) halophytes

• question_answer127) DNA element with ability to change its position is called

A) cistron

B) transposon

C) intron

D) recon

• question_answer128) Which is always present in photochemical smog?

A) ${{O}_{3}}$

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

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

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

• question_answer129) Programmed cell death is scientifically termed as

A) autotomy

B) cell lysis

C) apoptosis

D) None of these

• question_answer130) Which is the major crop in Asia?

A) Rice

B) Sugarcane

C) Jowar

D) Millet

• question_answer131) Areolar connective tissue joins

A) fat body with muscles

B) integument with muscles

C) bones with muscles

D) bones with bones

• question_answer132) Nerve cell do not divide because they do not have

A) nucleus

B) centrosome

C) Golgi body

D) mitochondria

• question_answer133) Heparin is synthesised in

A) liver

B) kidney

C) saliva

D) pancreas

A) formed in bone marrow

B) pre-processed in bone marrow

C) pre-processed in liver

D) formed in thymus

• question_answer135) Human ancestors, who left cave paintings were

A) Neanderthal man

B) Cro-magnon man

C) Java ape man

D) Peking man

• question_answer136) Which of the following are tiger reserves under the project tiger?

A) Bandipur Wildlife Sanctuary

B) Manas Wildlife Sanctuary

C) Simlipal Wildlife Sanctuary

D) Keibaul Lamjao National Park

• question_answer137) Which of the following statements are correct?

A) Mitochondria contain its own DNA

B) 70 S ribosomes occur in eukaryotes

C) 0Ribosomes are made up of phospholipids and oligosaccharide

• question_answer138) Blood is a kind of

A) areolar tissue

B) connective tissue

C) fluid connective tissue

D) reticular connective tissue

• question_answer139) Correctly matched set of phylum, class and example is

A) Protozoa-Mastigophora-Entamoeba

B) Mollusca-Bivalvia-Pinctata

C) Arthropoda-Diplopoda-Scolopendra

D) Chordata-Cyclostomata-Phrynosoma

• question_answer140) Menstruation is due to sudden

A) reduction of FSH

B) increase of LH

C) reduction in estrogen and progesterone

D) None of the above

• question_answer141) Largest tiger population is found in

A) Sunderban National Park

B) Corbett National Park

C) Ranthambhor National Park

D) Kanha National Park

• question_answer142) Which of the following floral parts forms pericarp after fertilization?

A) Nucellus

B) Outer integument

C) Ovary wall

D) Inner integument

• question_answer143) The thickness of unit membrane is

A) 20$\overset{o}{\mathop{A}}\,$

B) 35 $\overset{o}{\mathop{A}}\,$

C) 55 $\overset{o}{\mathop{A}}\,$

D) 75 $\overset{o}{\mathop{A}}\,$

• question_answer144) Real product of apiculture is

A) honey

B) bee wax

C) Both [a] and [b]

D) None of these

• question_answer145) Which of the following characters is related with telophase?

A) Formation of nuclear membrane

B) Formation of nucleolus

C) Elongation of chromosome

D) Formation of two daughter nuclei

• question_answer146) The site of photosynthesis in blue-green algae

A) chromatophores

B) mitochondria

C) chloroplast

D) root hair

• question_answer147) Genes exhibiting multiple effects are known as

A) complementary genes

B) pleiotropic genes

C) cistrons

D) pseudogenes

• question_answer148) LH in human female is

A) fascilitates luteinisation of granulosa cells of ovulated follicle

B) called ovulation hormone

C) helps in milk eyection

D) activates Leydigs cell to secrete androgen

A) have genes, which were linked together in a single chromosomes

B) show independent assortment.

C) do not show independent assortment

D) in prokaryotes are more than one

A) formed continuously by the process of ultrafiltration occurring at Malpighian corpuscles, in which the blood cells and the colloidal macromolecules are not allowed to pass across the filtering surface

B) the lipid free fluid collected within the human of Bowmans capsule

C) the protein free fluid collects within the lumen of Bowmans capsule

D) Formed by the process of selective reabsorption