# Solved papers for NEET AIPMT SOLVED PAPER 1999

### done AIPMT SOLVED PAPER 1999

• question_answer1) If a unit vector is represented by $0.5\hat{i}+0.8\hat{j}+c\hat{k}$ the value of c is:

A) 1

B) $\sqrt{0.11}$

C) $\sqrt{0.01}$

D) 0.39

• question_answer2) A person swims in a river aiming to reach exactly opposite point on the bank of a river. His speed of swimming is 0.5 m/s at an angle ${{120}^{\text{o}}}$ with the direction of flow of water. The speed of water in stream is:

A) 1.0 m/s

B) 0.5 m/s

C) 0.25 m/s

D) 0.43 m/s

• question_answer3) The escape velocity of a sphere of mass m is given by (G = universal gravitational constant, ${{M}_{e}}=$ mass of earth and ${{R}_{e}}=$ radius of earth):

A) $\sqrt{\frac{G{{M}_{e}}}{{{R}_{e}}}}$

B) $\sqrt{\frac{2\,G{{M}_{e}}}{{{R}_{e}}}}$

C) $\sqrt{\frac{2\,Gm}{{{R}_{e}}}}$

D) $\frac{G{{M}_{e}}}{R_{e}^{2}}$

• question_answer4) A 500 kg car takes a round turn of radius 50 m with a velocity of 36 km/h. The centripetal force is:

A) 250 N

B) 750 N

C) 1000 N

D) 1200 N

• question_answer5) The moment of inertia of a disc of mass M and radius R about a tangent to its rim in its plane is:

A) $\frac{2}{3}M{{R}^{2}}$

B) $\frac{3}{2}M{{R}^{2}}$

C) $\frac{4}{5}M{{R}^{2}}$

D) $\frac{5}{4}M{{R}^{2}}$

• question_answer6) The dimensional formula for magnetic flux is:

A) $[M{{L}^{2}}{{T}^{-2}}{{A}^{-1}}]$

B) $[M{{L}^{3}}{{T}^{-2}}{{A}^{-2}}]$

C) $[{{M}^{0}}{{L}^{-2}}{{T}^{2}}{{A}^{-2}}]$

D) $[M{{L}^{2}}{{T}^{-2}}{{A}^{2}}]$

• question_answer7) Two racing cars of masses m1 and m2 are moving in circles of radii ${{r}_{1}}$ and ${{r}_{2}}$ respectively. Their speeds are such that each makes a complete circle in the same time t. The ratio of the angular speeds of the first to the second car is:

A) 1 : 1

B) ${{m}_{1}}:{{m}_{2}}$

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

D) ${{m}_{1}}:{{m}_{2}}:{{r}_{1}}{{r}_{2}}$

• question_answer8) What is the linear velocity if angular velocity vector $\vec{\omega }=3\hat{i}-4\hat{j}+\hat{k}$ and position vector $\vec{r}=5\hat{i}-6\hat{j}+6\hat{k}\,?$

A) $6\hat{i}+2\hat{j}-3\hat{k}$

B) $-18\hat{i}-13\hat{j}+2\hat{k}$

C) $18\hat{i}+13\hat{j}-2\hat{k}$

D) $6\hat{i}-2\hat{j}+8\hat{k}$

• question_answer9) The force on a rocket moving with a velocity 300 m/s is 210 N. The rate of consumption of fuel of rocket is:

A) 0.7 kg/s

B) 1.4 kg/s

C) 0.07 kg/s

D) 10.7 kg/s

• question_answer10) Two bodies with kinetic energies in the ratio 4 : 1 are moving with equal linear momentum. The ratio of their masses is:

A) 1 : 2

B) 1 : 1

C) 4 : 1

D) 1 : 4

• question_answer11) The time period of a simple pendulum is 2 s. If its length is increased by 4 times, then its period becomes:

A) 16 s

B) 12 s

C) 8 s

D) 4 s

• question_answer12) Three identical metal balls each of radius r are placed touching each other on a horizontal surface such that an equilateral triangle is formed with centres of three balls joined. The centre of mass of the system is located at:

A) horizontal surface

B) centre of one of the balls

C) line joining the centres of any two balls

D) point of intersection of the medians

• question_answer13) If 1 g of steam is mixed with 1 g of ice, then the resultant temperature of the mixture is:

A) ${{270}^{\text{o}}}C$

B) ${{230}^{\text{o}}}C$

C) ${{100}^{\text{o}}}C$

D) ${{50}^{\text{o}}}C$

• question_answer14) The coefficients of linear expansions of brass and steel are ${{\alpha }_{1}}$ and ${{\alpha }_{2}}$ respectively. When we take a brass rod of length ${{l}_{1}}$ and a steel rod of length ${{l}_{2}}$ at ${{0}^{\text{o}}}C$, then the difference in their lengths $({{l}_{2}}-{{l}_{1}})$will remain the same at all temperatures if:

A) ${{\alpha }_{1}}{{l}_{1}}={{\alpha }_{2}}{{l}_{2}}$

B) ${{\alpha }_{1}}{{l}_{2}}={{\alpha }_{2}}{{l}_{1}}$

C) $\alpha _{1}^{2}{{l}_{2}}=\alpha _{2}^{2}{{l}_{1}}$

D) ${{\alpha }_{1}}l_{2}^{2}={{\alpha }_{2}}l_{1}^{2}$

• question_answer15) An ideal gas at ${{27}^{\text{o}}}C$ is compressed adiabattcally to $\frac{8}{27}$of its original volume. The rise in temperature is $\left( \gamma =\frac{5}{3} \right)$

A) ${{475}^{\text{o}}}C$

B) ${{402}^{\text{o}}}C$

C) ${{275}^{\text{o}}}C$

D) ${{375}^{\text{o}}}C$

• question_answer16) The degrees of freedom of a molecule of a diatomic gas are:

A) 2

B) 4

C) 6

D) 8

A) less than $3\times {{10}^{-7}}\,m$

B) equal to $3\times {{10}^{-7}}\,m$

C) more than $3\times {{10}^{-7}}\,m$

D) all of the above

• question_answer18) Two waves of wavelength 50 cm and 51 cm produce 12 beats/s. The speed of sound is:

A) 306 m/s

B) 331 m/s

C) 340 m/s

D) 360 m/s

• question_answer19) When air is replaced by a dielectric medium of constant K, the maximum force of attraction between two charges, separated by a distance:

A) decreases K times

B) increase K times

C) remains unchanged

D) becomes $\frac{1}{{{K}^{2}}}$ times

• question_answer20) In bringing an electron towards another electron, the electrostatic potential energy of the system:

A) decreases

B) increases

C) remains same

D) becomes zero

• question_answer21) A parallel plate condenser with oil (dielectric constant 2) between the plates has capacitance C. If oil is removed, the capacitance of capacitor becomes:

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

B) 2C

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

D) $\frac{C}{2}$

• question_answer22) The effective capacitance between points X and y of figure shown is:

A) $6\,\mu F$

B) $12\,\mu F$

C) $18\,\mu F$

D) $24\,\mu F$

• question_answer23) The current $(l)$ in the given circuit is:

A) 1.6 A

B) 2 A

C) 0.32 A

D) 3.2 A

• question_answer24) The resistance of a discharge tube is:

A) zero

B) ohmic

C) non-ohmic

D) infinity

• question_answer25) In metre-bridge the balancing length from left is found to be 20 cm when standard resistance of $1\Omega$ is in right gap. The value of unknown resistance is:

A) $0.25\,\,\Omega$

B) $0.4\,\,\Omega$

C) $0.5\,\,\Omega$

D) $4\,\,\Omega$

• question_answer26) A potentiometer consists of a wire of length 4m and resistance $10\,\,\Omega$. It is connected to a cell of emf 2V. The potential gradient of wire is:

A) 0.5 V/m

B) 2 V/m

C) 5 V/m

D) 10 V/m

• question_answer27) Colours of thin soap bubbles are due to:

A) refraction

B) dispersion

C) interference

D) diffraction

• question_answer28) A plano-convex lens is made of material of refractive index 1.6. The radius of curvature of the curved surface is 60 cm. The focal length of the lens is:

A) 50 cm

B) 100 cm

C) 200 cm

D) 400 cm

• question_answer29) The refractive index of the material of the prism is $\sqrt{3}$, then the angle of minimum deviation of the prism is:

A) ${{30}^{\text{o}}}$

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

C) ${{60}^{\text{o}}}$

D) ${{75}^{\text{o}}}$

• question_answer30) The wavelength of light of frequency 100 Hz is:

A) $2\times {{10}^{6}}m$

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

C) $4\times {{10}^{6}}m$

D) $5\times {{10}^{6}}m$

• question_answer31) The photoelectric work function for a metal surface is 4.125 eV. The cut-off wavelength for this surface is:

A) $4125\,\overset{\text{o}}{\mathop{\text{A}}}\,$

B) $3000\,\overset{\text{o}}{\mathop{\text{A}}}\,$

C) $6000\,\overset{\text{o}}{\mathop{\text{A}}}\,$

D) $2062.5\,\overset{\text{o}}{\mathop{\text{A}}}\,$

• question_answer32) When intensity of incident light increases:

A) photo-current increases

B) photo-current decreases

C) kinetic energy of emitted photoelectrons increases

D) kinetic energy of emitted photoelectrons decreases

• question_answer33) If a long hollow copper pipe carries a current, then magnetic field is produced:

A) inside the pipe only

B) outside the pipe only

C) both inside and outside the pipe

D) no where

• question_answer34) A straight wire of diameter 0.5 mm carrying a current of 1A is replaced by another wire of diameter 1 mm carrying the same current. The strength of magnetic field far away is:

A) twice the earlier value

B) one-half of the earlier value

C) one quarter of the earlier value

D) same as earlier value

• question_answer35) Magnetic field due to 0.1 A current flowing through a circular coil of radius 0.1m and 1000 turns at the centre of the coil is:

A) 0.2 T

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

C) $6.28\times {{10}^{-4}}T$

D) $9.8\times {{10}^{-4}}T$

• question_answer36) A diamagnetic substance is brought near a strong magnet, then it is:

A) attracted by a magnet

B) repelled by a magnet

C) repelled by north pole and attracted by south pole

D) attracted by north pole and repelled by south pole

• question_answer37) A bar magnet of magnetic moment $\vec{M}$ is placed in a magnetic field of induction $\vec{B}$. The torque exerted on it is:

A) $\vec{M}\,\vec{B}$

B) $-\vec{M}\,\vec{B}$

C) $\vec{M}\times \,\vec{B}$

D) $-\vec{M}\times \,\vec{B}$

• question_answer38) The internal resistance of a cell of emf 2 V is $0.1\,\,\Omega$. It is connected to a resistance of $3.9\,\,\Omega$. The voltage across the cell will be:

A) 0.5 V

B) 1.9 V

C) 1.95 V

D) 2 V

A) a stationary charge

B) uniformly moving charges

C) accelerated charges

D) all of the above

• question_answer40) In a circuit inductance L and capacitance C are connected as shown in figure. ${{A}_{1}}$ and ${{A}_{2}}$ are ammeters. When key K. is pressed to complete the circuit, then just after closing key (K), the reading of current will be:

A) zero in both ${{A}_{1}}$ and ${{A}_{2}}$

B) maximum in both ${{A}_{1}}$ and ${{A}_{2}}$

C) zero in ${{A}_{1}}$ and maximum in ${{A}_{2}}$

D) maximum in ${{A}_{1}}$ and zero in ${{A}_{2}}$

• question_answer41) Which of the following when added as an impurity into silicon produces n-type semiconductor?

A) P

B) Al

C) B

D) Mg

• question_answer42) In a junction diode, the holes are due to:

A) protons

B) extra electrons

C) neutrons

D) missing electrons

• question_answer43) Depletion layer consists of:

A) electrons

B) protons

C) mobile charge carriers

D) immobile ions

A) 2 free protons

B) helium atoms

C) singly ionised helium atoms

D) doubly ionised helium atoms

• question_answer45) In forward bias the width of depletion layer in a p-n junction diode:

A) increases

B) decreases

C) remains constant

D) first increases then decreases

• question_answer46) When a proton is accelerated through 1V its kinetic energy will be:

A) 1540 eV

B) 13.6 eV

C) 1 eV

D) zero

• question_answer47) In p-type semiconductor, the major charge carriers are:

A) holes

B) electrons

C) protons

D) neutrons

• question_answer48) In one a and 2$\beta$-emissions:

A) mass number reduces by 2

B) mass number reduces by 6

C) atomic number reduces by 2

D) atomic number remains unchanged

• question_answer49) Sodium has body centred packing. If the distance between two nearest atoms is $\text{3}\text{.7}\overset{\text{o}}{\mathop{\text{A}}}\,$ then the lattice parameter is:

A) 3.3 $\overset{\text{o}}{\mathop{\text{A}}}\,$

B) 3.9 $\overset{\text{o}}{\mathop{\text{A}}}\,$

C) 4.3 $\overset{\text{o}}{\mathop{\text{A}}}\,$

D) 4.8 $\overset{\text{o}}{\mathop{\text{A}}}\,$

• question_answer50) The following circuit represents:

A) OR gate

B) XOR gate

C) AND gate

D) NAND gate

• question_answer51) Which of the following configuration is correct for iron?

A) $1{{s}^{2}},\text{ }2{{s}^{2}}2{{p}^{6}},\text{ }3{{s}^{2}}3{{p}^{6}}3{{d}^{5}}$

B) $1{{s}^{2}},\text{ }2{{s}^{2}}2{{p}^{6}},\text{ }3{{s}^{2}}3{{p}^{6}},\text{ }4{{s}^{2}}3{{d}^{5}}$

C) $1{{s}^{2}},\text{ }2{{s}^{2}}2{{p}^{6}},\text{ }3{{s}^{2}}3{{p}^{6}},\text{ }4{{s}^{2}}3{{d}^{7}}$

D) $1{{s}^{2}},\text{ }2{{s}^{2}}2{{p}^{6}},3{{s}^{2}}3{{p}^{6}},\text{ }3{{d}^{6}},4{{s}^{2}}$

• question_answer52) Which of the following has more unpaired d-electrons?

A) $Z{{n}^{+}}$

B) $F{{e}^{2+}}$

C) ${{N}^{3+}}$

D) $C{{u}^{+}}$

• question_answer53) Oxidation state of Fe in $F{{e}_{3}}{{O}_{4}}$ is:

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

B) $\frac{4}{5}$

C) $\frac{5}{4}$

D) $\frac{8}{3}$

• question_answer54) If 0.15 g of solute, dissolved in 15 g of solvent, is boiled at a temperature higher by ${{0.216}^{\text{o}}}C,$ than that of the pure solvent, the molecular weight of the substance is (molal elevation constant for the solvent is ${{2.16}^{\text{o}}}C$):

A) 1.01

B) 10

C) 10.1

D) 100

• question_answer55) How many gram of dibasic acid (mol. wt. 200) should be present in 100 mL of the aqueous solution to give 0.1 N?

A) 1 g

B) 2 g

C) 10 g

D) 20 g

• question_answer56) At ${{25}^{\text{o}}}C$ and 730 mm pressure, 380 mL of dry oxygen was collected. If the temperature is constant, what volume will the oxygen occupy at 760 mm pressure?

A) 365 mL

B) 2 g

C) 10 g

D) 20 g

• question_answer57) For a first-order reaction, the half-life period is independent of:

A) initial concentration

B) cube root of initial concentration

C) first power of final concentration

D) square root of final concentration

• question_answer58) The uncertainty in momentum of an electron is $1\times {{10}^{-5}}\,m/s$. The uncertainty in its position will be$(h=6.62\times {{10}^{-34}}\,kg\,{{m}^{2}}/s)$:

A) $1.05\times {{10}^{-28}}\,m$

B) $1.05\times {{10}^{-26}}\,m$

C) $5.27\times {{10}^{-30}}\,m$

D) $5.25\times {{10}^{-28}}\,m$

• question_answer59) Who modified Bohr's theory by introducing elliptical orbits for electron path?

A) Hund

B) Thomson

C) Rutherford

D) Sommerfeld

• question_answer60) The de-Broglie wavelength of a particle with mass 1 g and velocity 100 m/s is:

A) $6.63\times {{10}^{-33}}\,m$

B) $6.63\times {{10}^{-34}}\,m$

C) $6.63\times {{10}^{-35}}\,m$

D) $6.65\times {{10}^{-36}}\,m$

• question_answer61) The concentration of $[{{H}^{+}}]$ and concentration of $[O{{H}^{-}}]$ of a 0.1 M aqueous solution of 2% ionised weak monobasic acid is: [ionic product of water $=1\times {{10}^{-14}}$]

A) $0.02\times {{10}^{-3}}\,M$ and $5\times {{10}^{-11}}\,M$

B) $1\times {{10}^{-3}}\,M$ and $3\times {{10}^{-11}}\,M$

C) $2\times {{10}^{-3}}\,M$ and $5\times {{10}^{-12}}\,M$

D) $3\times {{10}^{-2}}\,M$ and $4\times {{10}^{-13}}\,M$

• question_answer62) The strongest conjugate base is:

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

B) $C{{l}^{-}}$

C) $SO_{4}^{2-}$

D) $C{{H}_{3}}CO{{O}^{-}}$

• question_answer63) The specific conductance of a 0.1 N KCl solution at ${{23}^{\text{o}}}C$ is $0.012\,\,oh{{m}^{-1}}\,c{{m}^{-1}}$. The resistance of cell containing the solution at the same temperature was found to be 55 ohm. The cell constant will be:

A) $0.142\,c{{m}^{-1}}$

B) $0.66\,c{{m}^{-1}}$

C) $0.918\,\,c{{m}^{-1}}$

D) $1.12\,c{{m}^{-1}}$

• question_answer64) Which of the following is most acidic?

A) ${{N}_{2}}{{O}_{5}}$

B) ${{P}_{2}}{{O}_{5}}$

C) $A{{s}_{2}}{{O}_{5}}$

D) $S{{b}_{2}}{{O}_{5}}$

• question_answer65) The structure of ${{H}_{2}}{{O}_{2}}$ is:

A) planar

B) non-planar

C) spherical

D) linear

• question_answer66) Which one of the following statements is wrong for gases?

A) Gases do not have a definite shape and volume

B) Volume of the gas is equal to volume of container confining the gas

C) Confirmed gas exerts uniform pressure on the walls of its container in all directions

D) Mass of gas cannot be determined by weighing a container in which it is enclosed

• question_answer67) In an endothermic reaction, the value of $\Delta H$ is:

A) zero

B) positive

C) negative

D) constant

• question_answer68) In the reaction $S(s)+\frac{3}{2}{{O}_{2}}(g)\xrightarrow{{}}S{{O}_{3}}(g)+2x\,kcal$ and $S{{O}_{2}}(g)+\frac{1}{2}{{O}_{2}}(g)\xrightarrow{{}}S{{O}_{3}}(s)+y\,kcal$ the heat of formation of $S{{O}_{2}}$ is:

A) $(x+y)$

B) $(x-y)$

C) $(2x+y)$

D) $(2x-y)$

• question_answer69) Which of the following elements has maximum electron affinity?

A) CI

B) Br

C) I

D) F

• question_answer70) The most suitable method of the separation of a mixture of ortho and para-nitrophenol mixed in the ratio of 1 : 1 is:

A) distillation

B) crystallization

C) vaporisation

D) colour spectrum

• question_answer71) Sulphur = 35 (34.96903 amu) emits a $\beta$-particle but no $\gamma$-ray. The product is chlorine = 35 (34.96885 amu). The maximum energy emitted by the alpha-particle is:

A) 16.758 MeV

B) 1.6758 MeV

C) 0.16758 MeV

D) 0.016758 MeV

• question_answer72) The type of hybridisation of boron in diborane is:

A) sp-hybridisation

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

C) $s{{p}^{3}}$-hybridisation

D) $s{{p}^{3}}{{d}^{2}}$-hybridisation

• question_answer73) Purification of aluminium, by electrolyte refining, is known as:

A) Hall's process

B) Baeyer's process

C) Hoope's process

D) Serpeck's process

• question_answer74) Bell-metal is an alloy of:

A) Cu + Pb

B) Cu + Sn

C) Cu + Zn

D) Cu + Ni

• question_answer75) Which of the following does not show electrical conduction?

A) Potassium

B) Graphite

C) Diamond

D) Sodium

• question_answer76) Which of the following phosphorus, is the most reactive?

A) Red phosphorus

B) White phosphorus

C) Scarlet phosphorus

D) Violet phosphorus

• question_answer77) Cassiterite is an ore of:

A) Mn

B) Ni

C) Sb

D) Sn

• question_answer78) Which of the following is used in the preparation of chlorine?

A) Only $Mn{{O}_{2}}$

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

C) Both $Mn{{O}_{2}}$ and $KMn{{O}_{4}}$

D) Either $Mn{{O}_{2}}$ and $KMn{{O}_{4}}$

A) zero

B) 20

C) 80

D) 70

• question_answer80) In which of the following compounds transition metal has zero oxidation state?

A) $[Fe{{(CO)}_{5}}]$

B) $N{{H}_{2}}.N{{H}_{2}}$

C) $NOCl{{O}_{4}}$

D) $Cr{{O}_{5}}$

• question_answer81) When acetylene is passed through dil. ${{H}_{2}}S{{O}_{4}}$ in presence of $HgS{{O}_{4}}$, the compound formed is:

A) ether

B) ketone

C) acetic acid

D) acetaldehyde

• question_answer82) The solubility of a saturated solution of calcium fluoride is $2\times {{10}^{-4}}$ mol/L. Its solubility product is:

A) $12\times {{10}^{-2}}$

B) $14\times {{10}^{-4}}$

C) $22\times {{10}^{-11}}$

D) $32\times {{10}^{-12}}$

• question_answer83) The vapour pressure of benzene at a certain temperature is 640 mm. of Hg. A non-volatile and non-electrolyte solid, weighing 2.175 g is added to 39.08 g of benzene. If the vapour pressure of the solution is 600 mm of Hg, what is the molecular weight of solid substance?

A) 49.50

B) 59.60

C) 69.40

D) 79.82

• question_answer84) The number of atoms in 4.25g of $N{{H}_{3}}$ is approximately:

A) $1\times {{10}^{23}}$

B) $2\times {{10}^{23}}$

C) $4\times {{10}^{23}}$

D) $6\times {{10}^{23}}$

• question_answer85) In the following radioactive decay, $_{92}{{X}^{232}}\xrightarrow[{}]{{}}{{\,}_{89}}{{Y}^{220}}$, how many $\alpha$ and $\beta$ particles are ejected from X to Y?

A) 3$\alpha$ and 2$\beta$

B) 5$\alpha$ and 3$\beta$

C) 3$\alpha$ and 3$\beta$

D) 5$\alpha$ and 5 $\beta$

• question_answer86) The half-life of $_{6}{{C}^{14}},$ ($\lambda =2.31\,\times {{10}^{4}}$per year) is:

A) $2\times {{10}^{2}}$ year

B) $3\times {{10}^{3}}$ year

C) $3.3\times {{10}^{4}}$ year

D) $4\times {{10}^{3}}$ year

• question_answer87) Ethyl chloride is converted into diethyl ether by:

A) Wurtz synthesis

B) Grignard reaction

C) Perkin's reaction

D) Williamson's synthesis

• question_answer88) In the reaction $C{{H}_{3}}CN+2H\xrightarrow[SnC{{l}_{2}}]{HCl}X\xrightarrow[{}]{\text{Boiling}\,{{H}_{2}}O}Y,$ the term Y is:

A) acetone

B) ethanamine

C) acetaldehyde

D) dimethyl amine

• question_answer89) An organic compound containing C, H and N gave the following analysis C = 40% H = 13.33% and N = 46.67%. Its empirical formula would be:

A) CHN

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

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

D) ${{C}_{2}}{{H}_{7}}N$

• question_answer90) In Friedel-Craft's alkylation, besides $AlC{{l}_{3}}$ the other reactants are:

A) ${{C}_{6}}{{H}_{6}}+N{{H}_{2}}$

B) ${{C}_{6}}{{H}_{6}}+C{{H}_{4}}$

C) ${{C}_{6}}{{H}_{6}}+C{{H}_{3}}Cl$

D) ${{C}_{6}}{{H}_{6}}\,+C{{H}_{3}}COCl$

• question_answer91) Phenyl isocyanides are prepared from which of the following reaction?

A) Rosenmund's reaction

B) Carbylamine reaction

C) Reimcr-Tiemann reaction

D) Wurtz reaction

• question_answer92) The decomposition of organic compounds, in the presence of oxygen and without the development of odoriferous substances, is called:

A) decay

B) ${{N}_{2}}$-fixation

C) nitrification

D) denitrification

• question_answer93) Which of the following is the sweetest sugar?

A) Sucrose

B) Glucose

C) Fructose

D) Maltose

• question_answer94) Aldol condensation will not take place in:

A) HCHO

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

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

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

A) chlorobenzene

B) benzyl chloride

C) bromobenzene

D) benzene hexachloride

• question_answer96) Amides can be converted into amines by a reaction named after:

A) Perkin

B) Claisen

C) Hofmann

D) Kekule

• question_answer97) Which one of the following compounds will react with $NaHC{{O}_{3}}$ solution to give sodium salt and carbon dioxide?

A) Acetic acid

B) n-hexanol

C) Phenol

D) Both (b) and (c)

• question_answer98) Which of the following compounds will be more easily attacked by an electrophile?

A)

B)

C)

D)

• question_answer99) Terylene is a condensation polymer of ethylene glycol and:

A) benzoic acid

B) phthalic acid

C) salicylic acid

D) terephthalic acid

• question_answer100) Natural rubber is a polymer of:

B) ethyne

C) styrene

D) isoprene

• question_answer101) In soil, water available for plants is:

A) capillary water

B) chemically bound water

C) gravitational water

D) hygroscopic water

• question_answer102) The plant which bears clinging roots is:

A) Podostemon

B) Orchid

C) Trapa

D) Screw pine

• question_answer103) Which of the following organisms is likely to have more concentration of DDT in its body?

A) Primary producers

B) Herbivores

C) Carnivores

D) Top carnivores

• question_answer104) Secretion of progesterone by corpus luteum is initiated by:

A) thyroxine

B) LH

C) MSH

D) testosterone

• question_answer105) The respiratory centres which control inspiration and expiration are located in:

A) spinal cord

B) diencephalon

C) cerebellum

D) medulla oblongata

• question_answer106) The term aquaculture means:

A) aspergillosis

B) inland fisheries

C) marine fisheries

D) both (b) and (c)

• question_answer107) The proteins are synthesized at:

A) ribosomes

B) mitochondria

C) centrosomes

D) Golgi bodies

• question_answer108) Which of the following is the main category of mutation?

A) Somatic mutation

B) Genetic mutation

C) Zygotic mutation

D) All of the above

• question_answer109) In human beings, multiple genes are involved in the inheritance of:

A) skin colour

B) phenylketonuria

C) colour blindness

D) sickle cell anaemia

A) modified yellow elastic fibrous tissue

B) inelastic white fibrous tissue

C) modified white fibrous tissue

D) none of the above

• question_answer111) The middle piece of the sperm contains:

A) proteins

B) centriole

C) nucleus

D) mitochondria

• question_answer112) In which of the following would you place the plants having vascular tissue lacking seeds?

A) Gymnosperms

B) Algae

C) Pteridophytes

D) Bryophytes

• question_answer113) Which of the following has single membrane?

A) Mitochondria

B) Nucleus

C) Cell wall

D) Spherosomes

• question_answer114) Sympathetic nervous system induces:

A) heart-beat

B) secretion of digestive juices

C) secretion of saliva

D) all of die above

• question_answer115) The book 'Genera Plantarum' was written by:

A) Hutchinson

B) Bessey

C) Engler and Prantl

D) Bentham and Hooker

• question_answer116) In operon concept, regulator gene functions as:

A) repressor

B) inhibitor

C) regulator

D) all of these

• question_answer117) Casparian strips are found in:

A) hypodermis

B) endodermis

C) periderm

D) epidermis

A) Cutter fish

B) Anabus

C) Gambusia

D) Rohu

• question_answer119) A pair of insectivorous plants is:

A) Venus fly trap and Rafflesia

C) Drosera and Rafflesia

D) Dionaea and Viscum

• question_answer120) A system of classification in which a large number of traits are considered is:

A) phylogenetic system

B) artificial system

C) natural system

D) synthetic system

A) product of spore formation in bacteria

B) hybrid cells resulting from myeloma cells

C) nervous cells of frog

D) only cells having oncogenes

• question_answer122) The antherozoids of Funaria are:

A) monociliated

B) biciliated

C) multiciliated

D) aciliated

• question_answer123) In DNA when AGCT occurs, their association is as per which of the following pair?

A) AC-GT

B) AG-CT

C) AT-GC

D) All of these

• question_answer124) In 1984, Bhopal gas tragedy was caused due to the leakage of:

A) potassium isocyanate

B) sodium monoxide

C) sodium thiocyanate

D) methyl isocyanate

• question_answer125) An average person not doing hard work requires energy per day about:

A) 2800 kcal

B) 2000 kcal

C) 1000 kcal

D) 750 kcal

• question_answer126) Phenomenon of ?Industrial melanism? demons-trates:

A) reproductive isolation

B) induced mutation

C) natural selection

D) geographical isolation

• question_answer127) A marriage between normal-visioned man and colourblind woman will produce offspring:

A) 50% colourblind sons and 50% carrier daughters

B) colourblind sons and carrier daughters

C) normal males and carrier daughters

D) colourblind sons and 50% carrier daughters

• question_answer128) The problem due to $R{{h}^{-}}$ factor arises when the blood of two ($R{{h}^{+}}$ and $R{{h}^{-}}$) mix-up:

A) during pregnancy

B) through transfusion

C) in a test tube

D) both (a) and (b)

A) resistance developed after disease

B) increasing quantity of blood

C) resistance developed before disease

D) increasing rate of heart-beat

• question_answer130) Haemophilic man marries a normal woman. Their offspring will be:

A) all boys haemophilic

B) all normal

C) all girls haemophilic

D) all haemophilic

• question_answer131) Which of the following is mismatched?

A) Vitamin K?beri-beri

B) Vitamin D?rickets

C) Vitamin C?scurvy

D) Vitamin A?xeropthalmia

• question_answer132) Glucose is carried from digestive tract to liver by:

A) pulmonary vein

B) hepatic portal vein

C) hepatic artery

D) none of these

• question_answer133) The canal system is a characteristic feature of:

A) echinoderms

B) helminthes

C) coelenterates

D) sponges

• question_answer134) Cholecystokinin and duocrinin are secreted by:

B) thyroid gland

C) pancreas

D) intestine

• question_answer135) Tablets to prevent contraception contain:

A) progesterone

B) FSH

C) LH

D) both (b) and (c)

• question_answer136) Hybridization between $Tt\times tt$ gives rise to the progeny of ratio:

A) 1 : 1

B) 1 : 2 : 1

C) 1 : 2

D) 4 : 1

• question_answer137) Which part of the world has high density of organisms?

A) Deciduous forests

B) Grasslands

C) Savannas

D) Tropical rain forests

• question_answer138) Some of the enzymes, which are associated in converting fats into carbohydrates are present in:

A) microsomes

B) liposomes

C) Golgi bodies

D) glyoxysomes

• question_answer139) Photosynthetic bacteria have pigments in:

A) chromoplasts.

B) leucoplasts

C) chloroplasts

D) chromatophore

• question_answer140) Dichotomous branching is found in:

A) Marchantia

B) fern

C) liverworts

D) Funaria

• question_answer141) Edible part of litchi is:

A) pericarp

B) fleshy aril

C) mesocarp

D) endosperm

• question_answer142) Koch's postulates are not applicable to:

A) Cholera

B) Leprosy

C) TB

D) Diphtheria

• question_answer143) The maximum biomagnification would be in which of the following in case of aquatic ecosystem?

A) Fishes

B) Phytoplanktons

C) Birds

D) Zooplanktons

• question_answer144) The joint between atlas and axis is called:

A) pivot joint

B) hinge joint

D) angular joint

A) 60%

B) 30%

C) 22%

D) 11%

• question_answer146) The process of series of changes from larva to adult, after embryonic development is called:

A) regeneration

B) metamorphosis

C) growth

D) ageing

• question_answer147) The Pneumococcits experiment proves that:

A) DNA is the genetic material

B) RNA sometime controls the production of DNA and proteins

C) bacteria undergo binary fission

D) bacteria do not reproduce sexually

• question_answer148) ABA is involved in:

A) dormancy of seeds

B) increased cell division

C) root elongation

D) shoot elongation

• question_answer149) DNA is mainly found in:

A) nucleus only

B) cytoplasm only

C) nucleus and cytoplasm

D) nucleolus

A) They are thalloid

B) They possess archegonia

C) They contain chloroplasts

D) All of the above

• question_answer151) The eukaryotic genome differs from the prokaryotic genome because:

A) DNA is complexed with histones in prokaryotes

B) repetitive sequences are present in eukaryotes

C) genes in the former cases are organised into operons

D) DNA is circular and single stranded in prokaryotes

• question_answer152) Carbon dioxide acceptor in ${{C}_{3}}$-plants is:

A) PGA

B) RuDP

C) PEP

D) none of these

A) germs

B) carbohydrates

C) proteins

D) lipids

• question_answer154) Temperature changes in the environment affect most of the animals which are:

A) homoeothermic

B) aquatic

C) poikilothermic

D) desert living

• question_answer155) The term ?humulin? is used for:

A) human insulin

B) powerful antibiotic

C) isoenzyme

D) hydrolytic enzyme

A) interstitial cells of testes

D) posterior part of thyroid

• question_answer157) Which cranial nerve has the highest number of branches?

A) Facial nerve

B) Trigeminal

C) Vagus nerve

D) None of these

• question_answer158) Haemoglobin is a type of:

A) carbohydrate

B) vitamin

C) skin pigment

D) respiratory pigment

• question_answer159) After ovulation, Graafian follicle regresses into:

A) corpus luteum

B) corpus callosum

C) corpus albicans

D) corpus artesia

• question_answer160) Which is the principal cation in the plasma of the blood?

A) Magnesium

B) Sodium

C) Potassium

D) Calcium

• question_answer161) Which of the following is pollution related disorder?

A) Fluorosis

B) Leprosy

C) Pneumonicosis

D) Silicosis

• question_answer162) Which of the following are homologous organs?

A) Nails of human being and claws in animals

B) Wings of bird and wings of insect

C) Wings of bird and hand of human

D) Wings of bat and wings of cockroach

• question_answer163) Which of the following is a secondary pollutant?

A) Aerosol

B) CO

C) PAN

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

• question_answer164) Due to which of the following organism yield of rice has been increased?

A) Anabaena

B) Bacillus polymyxa

C) Bacillus popilliae

D) Sesbania

• question_answer165) Which of the following is regarded as a unit of nervous tissue?

A) Myelin sheath

B) Axons

C) Dendrites

D) Neurons

• question_answer166) To which of the following family do folic acid and pantothenic acid belong?

A) Vitamin C

B) Vitamin K

C) Vitamin A

D) Vitamin B complex

• question_answer167) Which of the following is mainly responsible for extinction of wild life?

A) Destruction of habitats

B) Pollution of air and water

C) Hunting for flesh

D) All of the above

• question_answer168) Life-span of a worker bee is:

A) 10 weeks

B) 10 days

C) 6 weeks

D) 15 days

• question_answer169) The junction between the axon of one neuron and the dendrite of the next is called:

A) junction point

B) a synapse

C) a joint

D) constant bridge

• question_answer170) Which of the following is the use of lichens in case of pollution?

A) lichens are not related with pollution

B) They act as bioindicators of pollution

C) They treat the polluted water

D) They promote pollution

A) small sporophyte phase generally parasitic on gametophyte

B) sporophyte of longer duration

C) dominant phase of gametophyte which produces spores

D) dominant phase of sporophyte which is parasitic

• question_answer172) Energy transfer from one trophic level to other in a food chain is:

A) 20%

B) 10%

C) 2%

D) 1%

• question_answer173) The rate of photosynthesis is higher in:

A) red light

B) blue light

C) green light

D) very high light

• question_answer174) The process of replication in plasmid DNA, other than initiation, is controlled by:

A) mitochondrial gene

B) bacterial gene

C) plasmid gene

D) none of the above

• question_answer175) The closing and opening of the leaves of Mimosa pudica is due to:

A) chemonastic movement

B) thermonastic movement

C) seismonastic movement

D) hydrotropic movement

• question_answer176) Green house effect refers to:

A) production of cereals

B) cooling of earth

C) trapping of UV rays

D) warming of earth

• question_answer177) Which of the following is related to genetic engineering?

A) Mutation

B) Plasmid

C) Plastid

D) Heterosis

• question_answer178) The first transgenic crop was:

A) cotton

B) pea

C) tobacco

D) flax

• question_answer179) The thickening of walls of arteries are called:

A) arthritis

B) atherosclerosis

C) anaeurysm

D) both (a) and (c)

• question_answer180) Rate of heart-beat is determined by:

A) Purkinje fibres

B) Papillary muscles

C) SA node

D) AV node

• question_answer181) The endosperm of gymnosperm is:

A) polyploid

B) haploid

C) triploid

D) diploid

• question_answer182) Angiosperm to which the largest flowers belong is:

A) partial root parasite

B) total stem parasite

C) total root parasite

D) partial root parasite

B) an antibiotic

D) not a pollutant

• question_answer184) Initiation codon in eukaryotes is:

A) AUG

B) AGU

C) UAG

D) GAU

• question_answer185) Which part of body secretes die hormone secretin?

A) Oesophagus

B) Duodenum

C) Stomach

D) Ileum

• question_answer186) Brunner's glands are present in:

A) stomach

B) duodenum

C) oesophagus

D) ileum

• question_answer187) The Minimata disease in Japan was caused through pollution of water by:

A) methyl isocyanate

B) mercury

D) cyanide

• question_answer188) The new verieties of plants are produced by:

A) selection and hybridization

B) selection and introduction

C) mutation and selection

D) introduction and mutation

• question_answer189) The aquatic fern, which is an excellent biofertiliser, is:

A) Azolla

B) Pteridium

C) Satvinia

D) Marsilia

• question_answer190) Diabetes is due to:

A) iodine deficiency

B) hormonal deficiency

C) $N{{a}^{+}}$ deficiency

D) enzyme deficiency

B) modified white fibrous tissue

C) areolar tissue

D) yellow fibrous connective tissue

• question_answer192) The function of oxytocin is to help in:

A) growth

B) lactation

C) childbirth

D) gametogenesis

A) ammonotelic

B) ureotelic

C) ureotelic in water

D) ureotelic over land

A) Hind-limb

B) Pectoral girdle

C) Pelvic girdle

D) Fore-limb

• question_answer195) A gene pair hides the effect of another gene. This phenomenon is called:

A) epistasis

B) segregation

C) mutation

D) dominance

• question_answer196) Columella is a specialised structure found in the sporangium of:

A) Spirogyra

B) Rhizopus

C) Ulthorix

D) None of these

• question_answer197) The type of placentation in which ovary is syncarpous, unilocular and ovules on structures is called:

A) marginal placentation

B) parietal placentation

C) axile placentation

D) superficial placentation

• question_answer198) The blood group with antibody-a aid antibody-b is:

A) B

B) A

C) O

D) AB

• question_answer199) Net gain of ATP molecules during aerosol respiration is:

A) 36 molecules

B) 60 molecules

C) 38 molecules

D) 48 molecules

• question_answer200) In prokaryotes, the genetic material is:

A) linear DNA without histones

B) linear DNA with histones

C) circular DNA with histones

D) circular DNA without histones