# Solved papers for JCECE Medical JCECE Medical Solved Paper-2005

### done JCECE Medical Solved Paper-2005

• question_answer1) If the velocity of light c, gravitational constant G and Planck's constant$h,$are chosen as fundamental units, the dimensional formula of length L in the new system is:

A) $[{{h}^{1}}{{c}^{1}}{{G}^{-1}}]$

B) $[{{h}^{1/2}}{{c}^{1/2}}{{G}^{-1/2}}]$

C) $[{{h}^{1}}{{c}^{-3}}{{G}^{-1}}]$

D) $[{{h}^{1/2}}{{c}^{-3/2}}{{G}^{1/2}}]$

• question_answer2) The radius of sphere is measured to be $(2.1\,\pm \,0.5)\,cm.$Calculate its surface area with error limits:

A) $(55.4\,\pm \,26.4)\,c{{m}^{2}}$

B) $(55.4\,\pm \,0.02)\,c{{m}^{2}}$

C) $(55.4\,\pm \,2.64)\,c{{m}^{2}}$

D) $(55.4\,\pm \,0.26)\,c{{m}^{2}}$

• question_answer3) A block of mass 2 kg rests on a plane inclined at an angle of${{30}^{o}}$with the horizontal. The coefficient of friction between the block and surface is 0.7. The frictional force acting on the block is:

A) 11.9 N

B) 25 N

C) 50 N

D) 22.9 N

• question_answer4) A particle moves along Y-axis in such a way that its $y-$coordinate varies with time $t$according to the relation$y=3+5t+7{{t}^{2}}.$The initial velocity and acceleration of the particle are respectively:

A) $14m{{s}^{-1}},-5\,m{{s}^{-2}}$

B) $19\,m{{s}^{-1}},-9\,m{{s}^{-2}}$

C) $-14\,m{{s}^{-1}},-5\,m{{s}^{-2}}$

D) $5m{{s}^{-1}},14m{{s}^{-2}}$

• question_answer5) An object travels north with a velocity of $10\,m{{s}^{-1}}$ and then speeds up to a velocity of $25\,m{{s}^{-1}}$ in 5 s. The acceleration of the object in these 5 s is:

A) $12\,m{{s}^{-2}}$ in north direction

B) $3\,m{{s}^{-2}}$in north direction

C) 15ms 2 in north direction

D) $3\,m{{s}^{-2}}$in south direction

• question_answer6) An automobile travelling at 50 km/h, can be stopped at a distance of 40 m by applying brakes. If the same automobile is travelling at 90 km/h, all other conditions remaining same and assuming no skidding, the minimum stopping distance in metres is:

A) 72

B) 92.5

C) 102.6

D) 129.6

• question_answer7) A rifle shoots a bullet with a muzzle velocity of$500\,m{{s}^{-1}}$ at a small target 50 m away. To hit the target the rifle must be aimed: (Take$g=10\,m{{s}^{-2}}$)

A) exactly at the target

B) 10 cm below the target

C) 10 cm above the target

D) 5 cm above the target

• question_answer8) The centripetal acceleration of particle of mass $m$moving with a velocity v in a circular orbit of radius r is:

A) ${{v}^{2}}/s$along the radius, towards the centre

B) ${{v}^{2}}/r$along the radius, away from the centre

C) $m{{v}^{2}}/r$along the radius, away the centre

D) $m{{v}^{2}}/r$along the radius, towards the centre

• question_answer9) An$\alpha -$particle of mass m suffers one dimensional elastic collision with a nucleus of unknown mass. After the collision the $\alpha -$particle is scattered directly backwards losing 75% of its kinetic energy. The mass of the unknown nucleus is:

A) m

B) 2m

C) 3m

D) $\frac{3}{2}m$

• question_answer10) If a transformer of an audio amplifier has output impedance 8000 0 and the speaker has input impedance of 80, the primary and secondary turns of this transformer connected

A) 1000 : 1

B) 100 : 1

C) 1 : 32

D) 32 : 1

• question_answer11) A stationary body of mass m explodes into the three parts having masses in the ratio 1:3:3. The two fractions with equal masses move at right angles to each other with a velocity of $1.5\,m{{s}^{-1}}.$ The velocity of the third part is:

A) $4.5\sqrt{2}\,m{{s}^{-1}}$

B) $5\,m{{s}^{-1}}$

C) $5\sqrt{32}\,m{{s}^{-1}}$

D) $1.5\,m{{s}^{-1}}$

• question_answer12) In the electromagnetic spectrum, the visible spectrum lies between:

B) infrared and ultraviolet rays

C) microwaves and infrared spectrum

D) X-ray and gamma ray spectrum

• question_answer13) An object of mass $m$falls on to a spring of constant k from height$h.$The spring undergoes compression by a length$x.$The maximum compression $x$ is given by the equation:

A) $m\,g\,h=\frac{1}{2}k{{x}^{2}}$

B) $m\,g(h+x)=\frac{1}{2}k{{x}^{2}}$

C) $m\,g(h+x)=-kx$

D) $m\,g\,h=-kx$

• question_answer14) A 5000 kg rocket is set for vertical firing. The exhaust speed is $800\text{ }m/s.$ To give an initial upward acceleration of $20\,m/{{s}^{2}},$ the amount of gas ejected per second to supply the needed thrust will be:

A) 137.5 kg/s

B) 185.5 kg/s

C) 127.5 kg/s

D) 187.5 kg/s

• question_answer15) An elastic ball is dropped from a height h and it rebounds many times from the floor. If the coefficient of restitution is e, the time interval between the second and the third impact, is:

A) $\frac{ev}{g}$

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

C) ${{e}^{2}}\sqrt{\left( \frac{8h}{g} \right)}$

D) ${{e}^{2}}\sqrt{\left( \frac{h}{g} \right)}$

• question_answer16) An object of mass m is attached to light string which passess through a hollow tube. The object is set into rotation in a horizontal circle of radius ${{r}_{1}}.$If the string is pulled shortening the radius to ${{r}_{2}},$the ratio of new kinetic energy to the original kinetic energy is:

A) ${{\left( \frac{{{r}_{2}}}{{{r}_{1}}} \right)}^{2}}$

B) ${{\left( \frac{{{r}_{1}}}{{{r}_{2}}} \right)}^{2}}$

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

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

• question_answer17) Total angular momentum of a rotating body remains constant,, if the net torque acting on the body is:

A) zero

B) maximum

C) minimum

D) unity

• question_answer18) A car is racing on a circular track of 180 m radius with a speed of $32\,m{{s}^{-1}}.$What should be the banking angle of the road to avoid chances of skidding of the vehicle at this speed without taking into consideration the friction between the tyre and the road?

A) ${{45}^{o}}$

B) ${{60}^{o}}$

C) ${{30}^{o}}$

D) ${{15}^{o}}$

• question_answer19) When a ceiling fan is switched on it makes 10 rotations in the first 3 s. The number of rotations it makes in the next 3s, assuming Uniform angular acceleration is:

A) 40

B) 30

C) 20

D) 10

• question_answer20) A body is projected vertically upwards from the surface of a planet of radius r with a velocity equal to 1/3rd the escape velocity for the planet. The maximum height attained by the body is:

A) R/2

B) R/3

C) R/5

D) R/9

• question_answer21) A man weighs 80 kg on earth's surface. The height above ground where he will weigh 40 kg, is : (Radius of earth is 6400 km)

A) 0.31 times r

B) 0.41 times r

C) 0.51 times r

D) 0.61 times r

• question_answer22) An adulterated sample of milk has a density of $1032\,kg-{{m}^{3}},$ while pure milk has a density of $1080\,kg-{{m}^{-3}}.$The volume of pure milk in a sample of 10 L of adulterated milk is:

A) 0.5 L

B) 1.0 L

C) 2.0 L

D) 4.0 L

• question_answer23) Typical silt (hard mud) particle of radius $20\,\mu m$is on the top of lake water, its density is $2000\,kg/{{m}^{3}}$and the viscosity of lake water is$1.0\,m\,Pa,$, density is$1000\,kg/{{m}^{3}}.$ If the lake is still (has no internal fluid motion), the terminal speed with which the particle hits the bottom of the lake in mm/s is:

A) 0.67

B) 0.77

C) 0.87

D) 0.97

• question_answer24) A solid sphere and a hollow sphere, both of the same size and same mass roll down an inclined plane. Then:

A) solid sphere reaches the ground first

B) hollow sphere reaches the ground first

C) both spheres reaches the ground at the same time

D) the time at which the spheres reach the ground cannot be specified by the given data

• question_answer25) If P is the pressure, V the volume, R the gas constant, $k$the Boltzmann constant and T the absolute temperature, then the number of molecules in the given mass of the gas is given by:

A) $\frac{PV}{RT}$

B) $\frac{PV}{kT}$

C) $\frac{PR}{T}$

D) $PV$

• question_answer26) An air bubble is released from the bottom of a pond and is found to expand to thrice its original volume as it reached the surface. If the atmospheric pressure is $\text{100}\,\text{kpa,}$ the absolute pressure at the bottom of lake in$\text{kpa}$ is ... (assume no temperature variation):

A) 33.3

B) 50.0

C) 100.0

D) 300.0

• question_answer27) Maxwell in his famous equation of electromagnetism introduced the concept:

A) AC current

B) DC current

C) displacement current

D) impedance

• question_answer28) 1 g of steam at $\text{100}{{\,}^{\text{o}}}\text{C}$and equal mass of ice at $\text{0}{{\,}^{\text{o}}}\text{C}$are mixed. The temperature of the mixture in steady state will be (latent heat of steam $\text{= 540}\,\text{cal/g,}$ latent heat of $\text{ice}\,\text{=}\,\text{80}\,\text{cal/g}$) :

A) $50{{\,}^{o}}C$

B) $100{{\,}^{o}}C$

C) $67{{\,}^{o}}C$

D) $33{{\,}^{o}}C$

• question_answer29) The work done by a gas is maximum when it expands:

A) isothermally

C) isochorically

D) isobarically

• question_answer30) A tuning fork of frequency 580 Hz is employed to produce transverse waves on, a long rope. The distance between the nearest crests is found to be 20 cm. The velocity of the wave is:

A) $58\,m{{s}^{-1}}$

B) $580\,m{{s}^{-1}}$

C) $20\,m{{s}^{-1}}$

D) $116\,m{{s}^{-1}}$

• question_answer31) A heavy brass sphere is hung from a weightless inelastic spring and as a simple pendulum its time period of oscillation is T. When the sphere is immersed in a non-viscous liquid of density 1/10 that of brass, it will act as a simple pendulum of period :

A) $T$

B) $\frac{10}{9}T$

C) $\sqrt{\left( \frac{9}{10} \right)}T$

D) $\sqrt{\left( \frac{10}{9} \right)}T$

• question_answer32) The distance travelled by a sound wave when a tuning fork completes 25 vibrations is 16.5 m. If the frequency of the tuning fork is 500 Hz, find the velocity of sound.

A) $350\,m{{s}^{-1}}$

B) $330\,m{{s}^{-1}}$

C) $300\,m{{s}^{-1}}$

D) $450\,m{{s}^{-1}}$

• question_answer33) Two instruments having stretched strings are being played in unison. When the tension of one of the instruments is increased by 1%, 3 beats are produced in 2s. The initial frequency of vibration of each wire is:

A) 300 Hz

B) 500 Hz

C) 1000 Hz

D) 400 Hz

• question_answer34) Three point charges 1C, 2C and 3 C are placed at the corners of an equilateral triangle of side 1m. The work done in bringing these charges to the vertices of a smaller similar triangle of side 0.5 m is:

A) $2.7\times {{10}^{10}}\,J$

B) $9.9\times {{10}^{10}}\,J$

C) $10.8\times {{10}^{10}}\,J$

D) $5.4\times {{10}^{10}}\,J$

• question_answer35) The capacitors A and B have identical geometry. A material with a dielectric constant 3 is present between the plates of B. The potential difference across A and B are respectively:

A) $2.5\,V,7.5\,V$

B) $2\,V,8V$

C) $8\,V,2V$

D) $7.5\,V,\,2.5\,V$

• question_answer36) An electric bulb is marked 100 W, 230 V. If the supply voltage drops to 115 V, what is the total energy produced by the bulb in 10 min?

A) 30 kJ

B) 2D kJ

C) 15 kJ

D) 10 kJ

• question_answer37) A circular coil carrying a current has a radius R. The ratio of magnetic induction at the centre of the coil and at a distance equal to $\sqrt{3}R$from the centre of the coil on the axis is:

A) 1 : 1

B) 1 : 2

C) 2 : 1

D) 8 : 1

• question_answer38) The .examples of 'diamagnetic, paramagnetic and ferromagnetic materials are respectively:

A) copper, aluininium, iron

B) aluminium, copper, iron

C) copper, iron, aluminium

D) aluminium, iron, copper

• question_answer39) In the Wheatstone's bridge shown below, in order to balance the bridge we must have:

A) ${{R}_{1}}=3\Omega ,{{R}_{2}}=3\Omega$

B) ${{R}_{1}}=6\Omega ,{{R}_{2}}=1.5\Omega$

C) ${{R}_{1}}=1.5\Omega ,{{R}_{2}}=\text{any}\,\text{finite}\,\text{value}$

D) ${{R}_{1}}=3\Omega ,{{R}_{2}}=\text{any}\,\text{finite}\,\text{value}$

• question_answer40) Four $10\,\,\mu F$capacitors are connected to a 500 V supply as shown in the figure. The equivalent capacitance of the network is:

A) $40\,\mu F$

B) $20\,\mu F$

C) $13.3\,\mu F$

D) $10\,\mu F$

• question_answer41) A resistor is constructed as hollow cylinder of dimensions ${{r}_{a}}=0.5\,cm$and ${{r}_{b}}=1.0\,cm$and $\rho =3.5\times {{10}^{-5}}\Omega \,m.$The resistance of the configuration for the length of 5 cm cylinder is

A) 7.43

B) 10.56

C) 14.38

D) 16.48

• question_answer42) The resistors are connected as shown in the figure below. Find the equivalent resistance between the points A and B.

A) $205\Omega$

B) $10\Omega$

C) $3.5\,\Omega$

D) $5\,\Omega$

• question_answer43) The figure below shows a 2.0 V potentiometer used for the determination of internal resistance of a 2.5 V cell. The balance point of the cell in the open circuit is 75 cm. When a resistor of $10\Omega$is used in the external circuit of the cell, the balance point shifts to 65 cm length of potentiometer wire. The internal resistance of the cell is:

A) $2.5\Omega$

B) $2.0\,\Omega$

C) $1.54\,\Omega$

D) $1.0\,\Omega$

• question_answer44) An electric heater boils 1 kg of water in a time ${{t}_{1}}.$Another heater boils the same amount of water in a time ${{t}_{2}}.$When the two heaters are connected in parallel, the time required by them together to boil the same amount of water is:

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

B) ${{t}_{1}}{{t}_{2}}$

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

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

• question_answer45) Two thin metallic strips, carrying current in the direction shown, cross each other perpendicularly without touching but being close to each other, as shown in the figure. The regions which contain some points of zero magnetic induction are:

A) I and II

B) I and III

C) I and IV

D) II and III

• question_answer46) The force on a conductor of length I placed in a magnetic field of magnitude B and carrying a current$i$is given by ($\theta$is the angle, the conductor makes with the direction of B):

A) $F=i\,lB\sin \theta$

B) $F={{i}^{2}}l{{B}^{2}}\sin \theta$

C) $F=i\,l\,B\,\cos \theta$

D) $F=\frac{{{i}^{2}}l}{B}\sin \theta$

• question_answer47) A needle made of bismuth is suspended freely in a magnetic field. The angle which the needle makes with the magnetic field is:

A) ${{0}^{o}}$

B) ${{45}^{o}}$

C) ${{90}^{o}}$

D) ${{180}^{o}}$

• question_answer48) The resonant frequency of an LCR. Circuit occurs at a frequency equal to:

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

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

C) $\frac{1}{LCR}$

D) $\frac{1}{CR}$

• question_answer49) An alternating .current is ' given by $i={{i}_{1}}\cos \,\omega t+{{i}_{2}}\sin \omega t.$The rms current is given by:

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

B) $\frac{{{i}_{1}}-{{i}_{2}}}{\sqrt{2}}$

C) $\sqrt{\left( \frac{i_{1}^{2}+i_{2}^{2}}{2} \right)}$

D) $\sqrt{\left( \frac{i_{1}^{2}-i_{2}^{2}}{2} \right)}$

• question_answer50) The coefficient of mutual inductance between the primary and secondary of the coil is 5 H. A current of 10 A is cut-off in 0.5 s. The induced emf is:

A) 1 V

B) 10 V

C) 5 V

D) 100 V

• question_answer51) The standard adopted for the determination of atomic weight of elements is based on:

A) ${{H}^{1}}$

B) ${{C}^{12}}$

C) ${{O}^{16}}$

D) ${{S}^{32}}$

• question_answer52) Law of multiple proportions is illustrated by one of the following pairs:

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

B) $N{{H}_{3}}$and $N{{O}_{2}}$

C) $N{{a}_{2}}S$and $N{{a}_{2}}O$

D) ${{N}_{2}}O$and $NO$

• question_answer53) Paramagnetism of oxygen is explained on the basis of its electronic configuration of:

A) $(2\pi _{\pi }^{*}){{(2{{\pi }_{y}})}^{1}}$

B) ${{({{\pi }^{*}}2{{p}_{y}})}^{1}}({{\pi }^{*}}2p_{z}^{1})$

C) ${{(2\sigma _{s}^{*})}^{1}}{{(2{{\pi }_{y}})}^{1}}$

D) ${{(2\sigma _{s}^{*})}^{1}}{{(2{{\pi }_{y}})}^{1}}$

• question_answer54) The van der Waals' equation for a real gas is given by the formula $\left( P+\frac{{{n}^{2}}a}{{{V}^{2}}} \right)(V-nb)=nRT$ where P, V, T and $n$are the pressure, volume, temperature and the number of moles of the gas. Which one is the correct interpretation for the parameter a?

A) The parameter a accounts for the finite size of the molecule, riot included temperature in the ideal gas law

B) The parameter a accounts for the shape of gas phase molecules

C) The parameter a accounts for intermolecular interaction's present in the molecule

D) The parameter a has no physical significance and van der Waals? introduced it as a numerical correction factor only

A) the ideal gas consists of a large number of small particles called molecules

B) under the same conditions of temperature and pressure equal volumes of gases contain the same number of molecules

C) volume of a definite quantity of gas at constant pressure is directly proportional to absolute temperature

D) a given mass of gas at constant pressure is directly proportional to absolute temperature

• question_answer56) The observation that the ground state of nitrogen atom has 3 unpaired electrons in its electronic configuration and not otherwise is associated with:

A) Pauli?s exclusion principle

B) Hund's rule of maximum multiplicity

C) Heisenberg?s uncertainty principle

D) Ritz combination principle

A)

B)

C)

D)

• question_answer58) In the periodic table metallic character of elements shows one of the following trend:

A) decreases down the group and increases across the period

B) increases down the group and decreases across the period

C) increases across the period and also down the group

D) decreases across the period and also down the group

• question_answer59) Which of the following statements is correct?

A) All carbon to carbon bonds contain a sigma bond and one or more pi bonds

B) All carbon to hydrogen bonds are pi bonds

C) All oxygen to hydrogen bonds are hydrogen bonds

D) All carbon to hydrogen bonds are sigma bonds

• question_answer60) An example of a polar covalent compound is:

A) $KCl$

B) $NaCl$

C) $CC{{l}_{4}}$

D) $HCl$

• question_answer61) If $\text{117 g NaCl}$is dissolved in 1000 g of water the concentration of the solution is said to be:

A) 2 molar

B) 2 molal

C)  1 normal

D)  1 molal

E)

• question_answer62) A solution of 4.5 g of a pure non-electrolyte in 100 g of water was found to freeze at $\text{0}\text{.465}{{\,}^{\text{o}}}\text{C}\text{.}$ The molecular weight of the solute is closest to $\text{(}{{\text{k}}_{f}}\text{=1}\text{.86):}$

A) 135.0

B) 172.0

C) 90.0

D) 180.0

• question_answer63) The enthalpy of vaporization of substance is $\text{840}\,\text{J}-\text{mo}{{\text{l}}^{-1}}$and its boiling point is$-\text{173}{{\,}^{\text{o}}}\text{C}\text{.}$ Its entropy of vaporization is:

A) $42\,J\,mo{{l}^{-1}}{{K}^{-1}}$

B) $21\,J\,mo{{l}^{-1}}{{K}^{-1}}$

C) $84\,J\,mo{{l}^{-1}}{{K}^{-1}}$

D) $8.4\,J\,mo{{l}^{-1}}{{K}^{-1}}$

• question_answer64) Given the following thermochemical equations : $Zn+\frac{1}{2}{{O}_{2}}\,\xrightarrow{{}}ZnO+84,000\,\text{cal}\,$ $Hg+\frac{1}{2}{{O}_{2}}\,\xrightarrow{{}}HgO+21,700\,\text{cal}\,$ Accordingly the heat of reaction for the following reaction $Zn+HgO\xrightarrow{{}}Hg+heat$ is:

A) 105,700 cal

B) 61,000 cal

C) 105,000 cal

D) 62,300 cal

• question_answer65) A saturated solution of$\text{Ca}{{\text{F}}_{\text{2}}}$ is $\text{2}\times {{10}^{-4}}\,\text{mol/L}$ Its solubility product constant is:

A) $2.6\times {{10}^{-9}}$

B) $4\times {{10}^{-8}}$

C) $8\times {{10}^{-12}}$

D) $3.2\times {{10}^{-11}}$

• question_answer66) For the reaction ${{H}_{2}}(g)+{{I}_{2}}(g)2HI(g)$the equilibrium constants expressed in terms of concentrations ${{\text{K}}_{\text{c}}}$and in terms of partial pressures ${{\text{K}}_{p}},$are related as:

A) ${{K}_{p}}={{K}_{c}}{{(RT)}^{2}}$

B) ${{K}_{p}}={{K}_{c}}{{(RT)}^{-2}}$

C) ${{K}_{p}}={{K}_{c}}$

D) ${{K}_{c}}={{K}_{p}}(RT)$

• question_answer67) Which of the following 1:1 mixture will act as buffer solution?

A) $HCl$and $NaOH$

B) $KOH$and $C{{H}_{3}}COOH$

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

D) $C{{H}_{3}}COOH$and $C{{H}_{3}}COONa$

• question_answer68) What is potential of platinum wire dipped into a solution of 0.1 M in $S{{n}^{2+}}$and 0.01 M in $S{{n}^{4+}}?$

A) ${{E}_{0}}$

B) ${{E}_{0}}+0.059$

C) ${{E}_{0}}+\frac{0.059}{2}$

D) ${{E}_{0}}=\frac{0.059}{2}$

• question_answer69) In one of the following reactions $\text{HN}{{\text{O}}_{\text{3}}}$does not behave as an oxidizing agent. Identify it:

A) ${{I}_{2}}+10HN{{O}_{3}}\xrightarrow{{}}2HI{{O}_{3}}+10N{{O}_{2}}+4{{H}_{2}}O$

B) $3Cu+8HN{{O}_{3}}\xrightarrow{{}}3Cu{{(N{{O}_{3}})}_{2}}$ $+\,2NO+4{{H}_{2}}O$

C) $4Zn+10HN{{O}_{3}}\xrightarrow{{}}4Zn{{(N{{O}_{3}})}_{2}}$ $+\,N{{H}_{4}}N{{O}_{3}}+3{{H}_{2}}O$

D) $2HN{{O}_{3}}+{{P}_{2}}{{O}_{5}}\xrightarrow{{}}2HP{{O}_{3}}+{{N}_{2}}{{O}_{5}}$

• question_answer70) Which of the following statement is not correct?

A) In zero order reaction the rate of the reaction remains constant throughout

B) A second order reaction would become a pseudo first order reaction when one of the reactants is taken in large excess

C) The value of first order rate constant depends on the units of the concentration terms used

D) In a first order reaction the plot of $\,\log \,(a-x)\,vs$time gives a straight line

A) $4n+1$

B) $4n+2$

C) $4n$

D) $4n+3$

• question_answer72) The number of isomeric hexanes is:

A) 5

B) 2

C) 3

D) 4

• question_answer73) The coagulating power of an electrolyte for arsenious sulphide decreases in the order:

A) $N{{a}^{+}}>A{{l}^{3+}}>B{{a}^{2+}}$

B) $PO_{4}^{3-}>SO_{4}^{2-}>C{{l}^{-}}$

C) $Cl>SO_{4}^{2-}>PO_{4}^{3-}$

D) $A{{l}^{3+}}>B{{a}^{2+}}>N{{a}^{+}}$

• question_answer74) The two optical isomers given below, namely, :

A) enantiomers

B) geometrical isomers

C) diastereomers

D) structural isomers

• question_answer75) Which of the following statement is wrong?

A) Using Lassaigne's test nitrogen and sulphur present in organic compound can be tested

B) Using Beilstein's test the presence of halogen in a compound can be tested

C) In Lassaigne's filtrate the'nitrogen present in a organic compound is converted into NaCN

D) In the estimation of carbon, an organic compound is heated with' CaO in a combustion tube

• question_answer76) $Cis-trans$isomers generally:

A) contain an asymmetric carbon atom

B) rotate the plane of polarized light

C) are enantiomorphs

D) contain double bonded carbon atoms

• question_answer77) Wurtz's reaction involves'the reduction of alkyl halide with:

A) $~Zn/HCl$

B) $HI$

C) $Zn/Cu$couple

D) Na in ether

• question_answer78) The reaction ${{C}_{12}}{{H}_{26}}\xrightarrow{{}}{{C}_{6}}{{H}_{12}}+{{C}_{6}}{{H}_{14}}$ represent:

A) substitution

B) synthesis

C) cracking

D) polymerization

A) ethanol

B) ethanal

C) methanol

D) propanone

• question_answer80) Which one of the .following compound reacts with chlorobenzene to produce DDT?

A) Acetaldehyde

B) Nitrobenzene

C) $m-$chloroacetaidehyde

D) Trichloroacetaldehyde

• question_answer81) Conversion of benzaldehyde to 3-phenyl-prop-2-en-1-oic acid is:

A) Perkin condensation

B) Claisen condensation

D) Aldol condensation

• question_answer82) Which of the following compounds forms an addition compound with $\text{C}{{\text{H}}_{\text{3}}}\text{MgBr,}$which on hydrolysis produce a secondary alcohol?

A) $HCHO$

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

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

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

• question_answer83) Which of the following pairs are correctly matched?

 1. Haber process Manufacture of ammonia 2. Leblanc process Manufacture of sulphuric acid 3. Birkeland-Eyde process Manufacture of nitric acid 4. Solvay process Manufacture of sodium carbonate
Select the correct answer using the codes given below:

A) 2, 3 and 4

B) 1, 2, 3 and 4

C) 1, 2 and

D) 1, 3 and 4

• question_answer84) Which of the following compounds on treatment first with $NaN{{O}_{2}}/HCl$and then coupled with phenol produces $p-$hydroxyazobenzene?

A) Nitrobenzene

B) Azobenzene

C) Phenol

D) Aniline

• question_answer85) Initial setting of cement is mainly due to:

A) hydration and gel formation

B) dehydration and gel formation

C) hydration and hydrolysis

D) dehydration and dehydrolysis

• question_answer86) A certain metal will liberate hydrogen from dilute acids. It will react with water to form hydrogen only when the metal is heated and the water is in the form of steam. The metal is probably:

A) iron

B) potassium

C) copper

D) mercury

• question_answer87) The number of alpha and beta particles emitted in the chain of reactions leading to the decay of$_{\text{92}}^{\text{238}}\text{U}$to $_{\text{82}}^{\text{206}}\text{Pb:}$

A) 8 beta particles and 6 alpha particles

B) 5 alpha particles and 0 beta particles

C) 8 alpha and 6 beta particles

D) 10 alpha particles and 10 beta particles

• question_answer88) Hydrogen peroxide when added to a solution of potassium permanganate acidified with sulphuric acid:

A) forms water only

B) acts as an oxidizing agent

C) acts as a reducing agent

D) reduces sulphuric acid

• question_answer89) The equilibrium molecular structure of hydrogen peroxide is:

A) planar as given below linear

B) tetrahedral

C) non planar

• question_answer90) Consider the following compounds.

 (i) Sulphur dioxide (ii) Hydrogen peroxide (iii) Ozone
Among these compounds identify those that can act as bleaching agent:

A) 1 and 3

B) 2 and 3

C) 1 and 2

D) 1, 2 and 3

• question_answer91) Alkali metals have high oxidation potential and hence, they behave as:

A) oxidizing agents

B) Lewis bases

C) reducing agents

D) electrolytes

• question_answer92) Water is oxidized to oxygen by:

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

B) $KMn{{O}_{4}}$

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

D) fluorine

• question_answer93) Identify the incorrect statement:

A) The molarity of a solution is independent of temperature

B) The tendency for catenation is much higher for carbon than for silicon

C) Nitriles and iso nitriles constitute metamers

D) t-buty 1 carbocation has planar carbons and is very reactive

• question_answer94) The magnetic momenta$\mu ,$of transition metals is related to the number of unpaired electrons,$n$ as:

A) $\mu =n{{(n+2)}^{2}}$

B) $\mu ={{n}^{2}}(n+2)$

C) $\mu =\frac{n}{(n+2)}$

D) $\mu =\frac{n}{\sqrt{n+2}}$

• question_answer95) Which one of the following statement is wrong?

A) The IUPAC name of$[Co{{(N{{H}_{3}})}_{6}}C{{l}_{3}}]$ is hexamine cobalt (III) chloride

B) Dibenzol peroxide is a catalyst in the polymerization of PVC

C) Borosilicate glass is heat resistant

D) Concentrated$\text{HN}{{\text{O}}_{\text{3}}}$can be safely tranported in aluminium containers

• question_answer96) Which of the following is not a thermoplastic?

A) Polystyrene

B) Teflon

C) Polyvinyl chloride

D) Nylon-6, 6

• question_answer97) Which set is the correct pairing set (or contains complementary pairs) responsible for the structure of DNA? (A-adenine, G-guanine, C-cystosine, T-thymine, U-uracil)

A) A-T, G-C

B) A-C, G-T

C) A-G, C-T

D) A-U, G-C

• question_answer98) Barbituric acid and its derivatives are well known as:

A) tranquilizers

B) antiseptics

C) analgesics

D) antipyretics

• question_answer99) The rate of a reaction is doubled for every $\text{1}{{\text{0}}^{\text{o}}}$ rise in temperature. The increase in reaction rate as a result of temperature rise from $\text{1}{{\text{0}}^{\text{o}}}$ to $\text{10}{{\text{0}}^{\text{o}}}$ is:

A) 112

B) 512

C) 400

D) 614

• question_answer100) The first artificial disintegration of an atomic nucleus was achieved by:

A) Geiger

B) Wilson

D) Rutherford

• question_answer101) The study related to the structure and function of a cell is called as:

A) Physiology

B) Cytology

C) Histology

D) Cellology

• question_answer102) The longest phase of meiosis -I is:

A) metaphase-I

B) prophase-I

C) anaphase-I

D) telophase-I

• question_answer103) Fluid mosaic model was given by:

A) Knoll arid Ruska

B) Singer and Ruska

C) Singer and Nicolson

D) Bateson and Punnet

• question_answer104) Colchicine prevents the mitosis of cell at:

A) prophase stage

B) anaphase stage

C) telophase stage

D) metaphase stage

• question_answer105) Phylogenetic system of classification was proposed by:

A) Linnaeus

B) Bentham

C) Hutchinson

D) Theophrastus

• question_answer106) The first acceptor of $\text{C}{{\text{O}}_{\text{2}}}$in ${{\text{C}}_{4}}$ plant is:

A) Pyruvic acid

B) phosphoenol pyruvic acid

C) acetic acid

D) oxaloacetic acid

• question_answer107) The term mitochondria was given by:

A) Benda

B) Altmann

D) deDuve

• question_answer108) Auxanometer is used to measure:

A) length

B) width

C) depth

D) growth

• question_answer109) The term protoplasm was coined by:

A) Virchow

B) Purkinje

C) Dujardin

D) Kolliker

• question_answer110) In Ulothrix meiosis occurs in:

A) gamete

B) zygdspore

C) zoospore

D) thallus

A) archegonia

B) antheridia

C) sporangia

D) both [a] and [b]

• question_answer112) Alexander Flemming in 1929 discovered:

A) penicillin

B) streptomycin

C) tetracyclin

D) chloromycidn

A) sporophyte

B) parasite

C) symbionts

D) predator

• question_answer114) Parachute mechanism of seed dispersal is seen in:

A) Poppy

B) Helianthus

C) Plumbago

D) Lotus

• question_answer115) Lomentum is a kind of:

A) inflorescence

B) plant

C) fruit

D) insect

• question_answer116) Which of the following is considered as a recessive character of Mendel?

A) Round seed

B) Wrinkled seed

C) Axial flower

D) Green pod

• question_answer117) In which of the following parthenocarpy makes no sense:

A) banana

B) orange

C) lemon

D) pomegranate

A) Raphano brassica

B) Triticale

C) Pomato

D) None of the above

• question_answer119) Cellular respiration occurs in:

A) chloroplast

B) Golgi bodies

C) mitochondria

D) nucleus

• question_answer120) Enzymes are functional at:

A) $10-15{{\,}^{o}}C$

B) $15-25{{\,}^{o}}C$

C) $25-30{{\,}^{o}}C$

D) $30-50{{\,}^{o}}C$

• question_answer121) Multiplication of DNA is called:

A) translation

B) replication

C) transduction

D) transcription

• question_answer122) The pigment sensitive for red and far-red light is:

A) chlorophyll

B) phytochrome

C) cytochrome

D) carotene

A) autotrophs

B) heterdtrophs

C) organotrophs

D) autoheterotrophs

• question_answer124) Acid rain is due to the pollution by:

A) $\text{C}{{\text{O}}_{\text{2}}}$

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

C) dust particles

D) automobiles

• question_answer125) Ovule with fimiculus lying close to micropyle is known as:

A) anatropous

B) campylotropous

C) atropous

D) cytokinin

• question_answer126) Hormone preventing seed dormancy is:

A) auxin

B) gibberellin

C) ethylene

D) cytokinin

• question_answer127) In CAM plants stomata are:

A) closed to night and open during the day

B) closed during the day arid open at night

C) never closes

D) never opens

A) Sewage

B) Plastic

C) Polythene

D) DDT

• question_answer129) In dicot stem secondary growth is due to the activity of:

A) apical meristem

B) lateral meristem

C) cork

D) bark

• question_answer130) The real force responsible for the movement of water from cell to cell is:

A) OP

B) TP

C) DPD

D) BP

• question_answer131) The inflorescence found in Ficus is known as:

A) cyathium

B) catkin

C) sycpnus

D) hypanthodium

• question_answer132) In Opuntia the spines are modification of:

A) leaf

B) branch

C) epidermis

D) flower

• question_answer133) 'Witches broom' disease is caused by:

A) fungus

B) mycoplasma

C) bacteria

D) mineral

A) antigen

B) antibody

C) interferon

D) intron

• question_answer135) Which of the following is symbiotic bacteria?

A) Rhizobium

B) Azotobactor

C) Clostridium

D) Streptomyces

• question_answer136) The thallus of Volvox is called:

A) trichome

B) coenobium

C) coenocyte

D) parenchymatous

• question_answer137) Resin duct of gymnospermous stem is an example of:

A) lysigenous cavity

B) lysogenous cavity

C) shizogenous cavity

D) shizolysigenous cavity

• question_answer138) During food chain the maximum energy is stored in:

A) producers

B) decomposers

C) herbivores

D) carnivores

• question_answer139) Insectivorous plant usually survive in:

A) water rich soil

B) ${{N}_{2}}$deficient soil

C) ${{N}_{2}}$rich soil

D) sugar deficient' medium

• question_answer140) Spore of Funaria on germination give rise to:

A) protonema

B) embryo

C) antheridia

D) archegonia

• question_answer141) The function of a vessel is:

A) conduction of food

B) conduction of water and minerals

C) conduction of hormones

D) all of the above

• question_answer142) In the phosphorus cycle, weathering makes phosphate available first to:

A) decomposers

B) consumers

C) producers

D) all of these

A) cork, cork cambium

B) secondary cortex

C) cork

D) cork, cork cambium and secondary cortex

• question_answer144) In a food chains the total amount of living material is depicted by:

A) pyramid of biomass

B) pyramid of energy

C) pyramid of number

D) trophic levels

• question_answer145) In the process of photosynthesis water molecule breaks in:

A) red drop

B) photolysis

C) phosphorylation

D) carbon assimilation

• question_answer146) Syngamy is the process in which:

A) male gamete fuses with female gamete

B) pollen tube enters into the ovule through micropyle

C) pollen tube enter into the ovule through chalaza

D) vegetative cell and tube cell fuse

• question_answer147) The 1:2:1 ratio with the pink flower in the ${{\text{F}}_{\text{2}}}$generation indicate the phenomenon of:

A) dominance

B) codominance

C) incomplete dominance

D) segregation

• question_answer148) The chemical produced by the host plant to protect themselves against fungal infection is:

A) toxin

B) phytoalexin

C) phytotoxin

D) hormone

• question_answer149) The phenomenon 'ontogeny repeats 'phylogeny? is explained by:

A) natural selection

B) inheritance theory

C) mutation theory

D) recapitulation theory

• question_answer150) Nitrates are converted to nitrogen by:

A) nitrogen fixing bacteria

B) ammomfication bacteria

C) denitrifying bacteria

D) nitrifying bacteria