question_answer2) An electric charge\[{{10}^{-3}}\mu C\]is placed at the origin (0, 0) of\[X-Y\]coordinate system. Two points A and B are situated at\[(\sqrt{2},\sqrt{2})\]and (2, 0) respectively. The potential difference between the points A and B will be
question_answer4) A charged oil drop is suspended in a uniform electric field of\[3\times {{10}^{4}}V/m\]so that it neither falls nor rises. The charge on the drop will be (take the mass of the drop is\[9.9\times {{10}^{-15}}kg\] And\[g=10m{{s}^{-2}}\])
question_answer5) Calorie is defined as the amount of heat required to raise the temperature of 1 g of water by\[1{}^\circ C\]and it is defined under which of the following conditions?
A)
From\[14.5{}^\circ C\]to\[15.5{}^\circ C\]at 760 mm of Hg
doneclear
B)
From\[98.5{}^\circ C\]to\[99.5{}^\circ C\]at 760 mm of Hg
doneclear
C)
From\[13.5{}^\circ C\]to\[14.5{}^\circ C\]at 76 mm of Hg
doneclear
D)
From\[3.5{}^\circ C\]to\[4.5{}^\circ C\]at 76 mm of Hg
question_answer6) Two particles having position vectors \[\overrightarrow{{{r}_{1}}}=(3\hat{i}+5\hat{j})m\]and\[\overrightarrow{{{r}_{2}}}=(-5\hat{i}-3\hat{j})m\]are moving with velocities\[\overrightarrow{{{v}_{1}}}=(4\hat{i}+3\hat{j})m{{s}^{-1}}\]and \[\overrightarrow{{{v}_{2}}}=(a\hat{i}+7\hat{j})m{{s}^{-1}}\]. If they collide after 2 s, the value of a is
question_answer7) An athlete throws a discus from rest to a final angular velocity of\[15\text{ }rad\text{ }{{s}^{-1}}\]in 0.270 s before releasing it. During acceleration, discus moves a circular arc of radius 0.810 m. Acceleration of discus before it is released is
question_answer8) In a sample of radioactive material, what fraction of the initial number of active nuclei will remain disintegrated after half of a half-life of the sample?
question_answer9) A charged capacitor discharges through a resistance R with time constant\[\tau \]. The two are now placed in series across an AC source of angular frequency\[\omega =\frac{1}{\tau }\]. The impedance of the circuit will be
question_answer10) A solid sphere of volume V and density\[\rho \]floats at the interface of two immiscible liquids of densities\[{{\rho }_{1}}\]and\[{{\rho }_{2}}\]respectively. If\[{{\rho }_{1}}<\rho <{{\rho }_{2}},\]then the ratio of volumes of the parts of the sphere in upper and lower liquids is
question_answer12) At what height from the surface of the earth, the total energy of the satellite is equal to its potential energy at a height of 2R from the surface of earth? (R =radius of earth)
question_answer13) A simple pendulum has time period\[{{T}_{1}}\]. The point of suspension is now moved upward according to the relation\[y=k{{t}^{2}}(k=1m{{s}^{-2}})\] where y is the vertical displacement. The time period now becomes\[{{T}_{2}}\]. The ratio of\[\frac{T_{1}^{2}}{T_{2}^{2}}\]is (take\[g=10m{{s}^{-2}}\])
question_answer14) A block released from rest from the top of a smooth inclined plane of angle\[{{\theta }_{1}}\]reaches the bottom in time\[{{t}_{1}}\]he same block released from rest from the top of another smooth inclined plane of angle\[{{\theta }_{2}},\]reaches the bottom in time \[{{t}_{2}}\].If the two inclined planes have the same height, the relation between\[{{t}_{1}}\]and\[{{t}_{2}}\]is
question_answer15) A projectile is thrown in the upward direction making an angle of\[60{}^\circ \]with the horizontal direction with a velocity of\[147\text{ }m{{s}^{-1}}\]. Then the time after which its inclination with the horizontal is\[45{}^\circ ,\]is
question_answer16) A metal wire of linear mass density 9.8 g/m is stretched with a tension of 10 kg-wt between two rigid supports 1 m apart. The wire passes at its middle point between the poles of a permanent magnet and it vibrates in resonance when carrying an alternating current of frequency v. The frequency v of alternating source is
question_answer17) A circular disc X of radius R is made from an iron plate of thickness t, and another plate Y of radius 4R is made from an iron plate of thickness t/ 4. The ratio of moments of inertia \[{{I}_{Y}}/{{I}_{X}}\]is
question_answer18) A Carnot engine whose sink is at 300 K has an efficiency of 40%. By how much should the temperature of source be increased as to increase its efficiency by 50% of original efficiency?
question_answer19) A large open tank has two holes in the wall. One is a square hole of side L at a depth y from the top and the other is a circular hole of radius R at a depth 4y from the top. When the tank is completely filled with water, the quantities of water flowing out per second from both holes are the same. Then, R is equal to
question_answer20) The angle of minimum deviation for a glass prism is equal to its refracting angle. The refractive index of glass is 1.5. Then the angle of prism is
question_answer21) Two periodic waves of intensities\[{{I}_{1}}\]and\[{{I}_{2}}\]pass through a region at the same time in the same direction. The sum of the maximum and minimum intensities is
question_answer23) A long straight wire carrying a current of 30 A is placed in an external uniform magnetic field of induction\[4\times {{10}^{-4}}T\]. The magnetic field is acting parallel to the direction of current. The magnitude of the resultant magnetic induction in tesla at a point 2.0 cm away from the wire is\[({{\mu }_{0}}=4\pi \times {{10}^{-7}}H{{m}^{-1}})\]
question_answer24) Copper has face centred cubic (fee) lattice with interatomic spacing equals to \[2.54\,\overset{\text{o}}{\mathop{\text{A}}}\,\]. The value of lattice constant for this lattice is
question_answer25) A block of mass 10 kg is moving in x-direction with a constant speed of\[10m{{s}^{-1}}\]. It is subjected to a retarding force\[F=-\text{ }0.1\text{ }x\,J\,{{m}^{-1}}\]during its travel from\[x=20\]m to\[x=30\text{ }m\]. Its final kinetic energy will be
question_answer26) Which of the following pairs have same dimensions? (1) Angular momentum and work (2) Torque and work (3) Energy and Young's modulus (4) Light-year and wavelength
question_answer27) Two particles are projected from the same point with the same speed, at different angles \[{{\theta }_{1}}\]and \[{{\theta }_{2}}\]to the horizontal. They have the same horizontal range. Their times of flights are\[{{t}_{1}}\]and\[{{t}_{2}}\]respectively. Then (1) \[{{\theta }_{1}}+{{\theta }_{2}}={{90}^{o}}\] (2) \[\frac{{{t}_{1}}}{\sin {{\theta }_{1}}}=\frac{{{t}_{2}}}{\sin {{\theta }_{2}}}\] (3) \[\frac{{{t}_{1}}}{{{t}_{2}}}=\tan {{\theta }_{1}}\] (4) \[\frac{{{t}_{1}}}{{{t}_{2}}}=\tan {{\theta }_{2}}\]
question_answer28) The displacement of a particle of mass 200 g from its mean position is given by \[y=0.05\text{ }\sin \text{ }(20\text{ }\pi t+1.6\pi )m\] (1) The period of motion is 0.1 s (2) The maximum acceleration is\[20{{\pi }^{2}}m{{s}^{-2}}\] (3) The energy of the particle is\[0.10{{\pi }^{2}}J\] (4) The energy of the particle is\[{{\pi }^{2}}J\]
question_answer29) When some potential difference is maintained between A and B, current i enters the network at A and leaves at B as shown in the figure. Then (1) The equivalent resistance between A and B is\[8\,\Omega \]. (2) C and D are at the same potential (3) Current\[\frac{3i}{5}\]flows from D to C (4) No current flows between C and D
question_answer30) A satellite close to the earth is in orbit above the equator with a period of rotation of 1.5 h. If it is above a point P on the equator at some time, it will be above P again after time (1) 1.5 h (2) 1.6 h if it is rotating from west to east (3)\[\frac{24}{17}\]h if it is rotating from west to east (4)\[\frac{24}{17}\]h if it is rotating from east to west
question_answer31) The electron in a hydrogen atom makes a transition\[{{n}_{1}}\to {{n}_{2}},\]where\[{{n}_{1}}\]and\[{{n}_{2}}\]are the principal quantum numbers of the two states. Assume the Bohr model to be valid. The time period of the electron in the initial state is eight times that in the final state. The possible values of\[{{n}_{1}}\]and\[{{n}_{2}}\]are (1) \[{{n}_{1}}=4;{{n}_{2}}=2\] (2) \[{{n}_{1}}=6,\,{{n}_{2}}=3\] (3) \[{{n}_{1}}=8,{{n}_{2}}=2\] (4)\[{{n}_{1}}=8,{{n}_{2}}=1\]
question_answer32) A simple pendulum with a bob of mass m is suspended from the roof of a car moving with a horizontal acceleration a. Then (1) the string makes an angle of\[{{\tan }^{-1}}\left( \frac{a}{g} \right)\] with the vertical (2) the string makes an angle of\[{{\tan }^{-1}}\left( 1-\frac{a}{g} \right)\] with the vertical (3) the tension in the string is\[\sqrt{{{a}^{2}}+{{g}^{2}}}\] (4) The tension in the string is\[\sqrt{{{g}^{2}}-{{a}^{2}}}\]
question_answer33) The vessel shown in figure has two sections of areas of cross-section\[{{A}_{1}}\]and\[{{A}_{2}}\]. A liquid of density p fills both the sections, up to height h in each neglecting atmospheric pressure. (1) The pressure at the base of the vessel is\[2h\rho g\] (2) The force exerted by the liquid on the base of vessel is\[2h\rho g{{A}_{2}}\] (3) The walls of the vessel at the level\[X\]exert a force\[h\rho g({{A}_{2}}-{{A}_{1}})\]downwards on the liquid (4) The weight of the liquid in vessel is equal to\[2h\rho g{{A}_{2}}\]
question_answer35) The displacement\[(x)\]of a particle depends on time\[(t)\,as\,x=\alpha {{t}^{2}}-\beta {{t}^{3}}\]. (1) The particle will come to rest after time\[\frac{2\alpha }{3\beta }\]. (2) The partice will return to its starting point after time\[\frac{\alpha }{\beta }\] (3) No net force will act on the particle at\[t=\frac{\alpha }{3\beta }\] (4) The initial velocity of the particle is not zero
question_answer36) Two electric bulbs rated at 25 W, 220 V and 100 W, 220 V are connected in series across a 220 V source. The 25 W and 100 W bulbs now draw powers\[{{p}_{1}}\]and\[{{p}_{2}}\]respectively. Then (1) \[{{P}_{1}}=4W\] (2) \[{{P}_{1}}=16W\] (3) \[{{P}_{2}}=16W\] (4) \[{{P}_{2}}=4W\]
question_answer37) The solar constant for the earth is S. The surface temperature of the sun is T K. The sun subtends an angle\[\theta \]at the earth. (1) \[S\propto {{T}^{4}}\] (2) \[S\propto {{T}^{2}}\] (3) \[S\propto {{\theta }^{2}}\] (4) \[S\propto \theta \]
question_answer38) Photoelectric effect supports quantum nature of light because (1) there is minimum frequency of light below which no photoelectrons are emitted (2) the maximum kinetic energy of photoelectrons depends only on the frequency of light and not on its intensity (3) even when the metal surface is faintly illuminated, the photoelectrons leave the surface immediately (4) electric charge of photoelectron is quantized
question_answer39) A particle P of mass m is attached to a vertical axis by two strings AP and BP of length I each as shown in the figure. The separation AB rotates around the axis with an angular velocity\[\omega \]. The tension in the two strings are \[{{T}_{1}}\]and\[{{T}_{2}}\]. Then (1) \[{{T}_{1}}-{{T}_{2}}=2mg\] (2) \[{{T}_{1}}+{{T}_{2}}=m{{\omega }^{2}}l\] (3) \[{{T}_{1}}={{T}_{2}}\] (4) \[{{T}_{1}}+{{T}_{2}}=mg\]
question_answer41) In a plane electromagnetic wave, the electric field oscillates sinusoidally at a frequency of \[2\times {{10}^{10}}Hz\] and amplitude 54 V. (1) The amplitude of oscillating magnetic field will be\[18\times {{10}^{-8}}Wb\text{ }{{m}^{-2}}\] (2) The amplitude of oscillating magnetic field will be\[18\times {{10}^{-7}}Wb\text{ }{{m}^{-2}}\] (3) The wavelength of electromagnetic wave is 1.5 cm (4) The wavelength of electromagnetic wave is 1.5 m
question_answer42) A ray of light travelling in a transparent medium falls on a surface separating the medium from air, at an angle of incidence of\[45{}^\circ \]. The ray undergoes total internal reflection. If |li is the refractive index of the medium with respect to air, select the possible values of [i from the following (1) 1.3 (2) 1.5 (3) 1.4 (4) 1.6
question_answer43) You lift a suitcase from the floor and keep it on a table. The work done by you on the suitcase does not depend on (1) initial and final positions (2) path taken by suitcase (3) weight of suitcase (4) time taken in doing the work
question_answer44) Which of the following properties support wave theory of light? (1) Light shows Compton effect (2) Light shows interference (3) Light shows photoelectric effect (4) Velocity of light in glass is smaller than velocity of light in water
question_answer45) A string of length L is stretched along the\[x-\]axis and is rigidly clamped at its two ends. It undergoes transverse vibrations. If n is an integer, which of the following relations may represent the shape of the string at any time t? (1) \[y=A\sin \left( \frac{n\pi x}{L} \right)\cos \omega t\] (2) \[y=A\sin \left( \frac{n\pi x}{L} \right)\sin \omega t\] (3) \[y=A\cos \left( \frac{n\pi x}{L} \right)\cos \omega t\] (4) \[y=A\cos \left( \frac{n\pi x}{L} \right)\sin \omega t\]
question_answer46) Two large, parallel conducting plates\[X\]and Y, kept close to each other, are given charges\[{{Q}_{1}}\] and \[{{Q}_{2}}({{Q}_{1}}>{{Q}_{2}}).\]The four surfaces of the plates are A, B, C and D, as shown in the figure, (1) The charge on A is \[\frac{1}{2}({{Q}_{1}}+{{Q}_{2}})\] (2) The charge on B is\[\frac{1}{2}({{Q}_{1}}-{{Q}_{2}})\] (3) The charge on C is \[\frac{1}{2}({{Q}_{2}}-{{Q}_{1}})\] (4) The charge on D is\[\frac{1}{2}({{Q}_{1}}-{{Q}_{2}})\]
question_answer47) In the circuit shown, which of the following statements is/are correct? (1) When S is open, charge on\[{{C}_{1}}\]is\[36\mu C\] (2) When S is open, charge on\[{{C}_{2}}\]is\[36\mu C\] (3) When S is closed, charges on both\[{{C}_{1}}\]and \[{{C}_{2}}\]change (4) When S is closed, charges on\[{{C}_{1}}\]and\[{{C}_{2}}\]do not change
question_answer48) When photons of energy 4.25 eV strike the surface of a metal A the ejected photoelectrons have a maximum kinetic energy\[{{E}_{A}}\,eV\]and de-Broglie wavelength\[{{\lambda }_{A}}\]. The maximum kinetic energy of photoelectrons liberated from another metal B by photons of energy 4.70 eV is\[{{E}_{B}}=({{E}_{A}}-1.50)eV\]. If the de-Broglie wavelength of these photoelectrons is\[{{\lambda }_{B}}=2{{\lambda }_{A}},\]then (1) the work function of A is 2.25 eV (2) the work function of B is 4.20 eV (3) \[{{E}_{A}}=2.0\,eV\] (4) \[{{E}_{B}}=2.75\,eV\]
question_answer49) The wavelengths and frequencies of photons in transitions 1, 2 and 3 for hydrogen like atom are\[{{\lambda }_{1}},{{\lambda }_{2}},{{\lambda }_{3}};{{v}_{1}},{{v}_{2}}\]and\[{{v}_{3}}\]respectively. Then (1) \[{{v}_{3}}={{v}_{1}}+{{v}_{2}}\] (2) \[{{\lambda }_{3}}={{\lambda }_{1}}+{{\lambda }_{2}}\] (3) \[{{\lambda }_{3}}=\frac{{{\lambda }_{1}}{{\lambda }_{2}}}{{{\lambda }_{1}}+{{\lambda }_{2}}}\] (4) \[{{v}_{3}}=\frac{{{v}_{1}}{{v}_{2}}}{{{v}_{1}}+{{v}_{2}}}\]
question_answer50) Which of the following is/are not equal to 1 in Boolean algebra? (1) \[A+1\] (2) \[A\,.\,\overline{A}\] (3) \[A+\overline{A}\] (4) \[\overline{A+\overline{A}}\]
question_answer55) If\[\Delta G=\Delta H-T\Delta S\]and\[\Delta G=\Delta H-T{{\left[ \frac{d(\Delta G)}{dT} \right]}_{p}},\] then variation of emf of a cell, E with temperature, T is given by
question_answer56) 3.92 g/L of a sample of ferrous ammonium sulphate reacts completely with 50 mL \[\frac{N}{10}KMn{{O}_{4}}\]solution. The percentage purity of the sample is
question_answer58) If an iodized salt contains 1% of\[KI\]and a person takes 2g of the salt every day, the iodide ions going into his body everyday would be approx.
question_answer59) In a metal oxide, the oxide ions are arranged in hexagonal close packing and metal ion occupy two-third of the octahedral voids. The formula of the oxide is
question_answer60) The vapour pressure of a solvent A is 0.80 atm. When a non-volatile substance B is added to this solvent, its vapour pressure drops to 0.60 atm. The mole fraction of A in the solution is
question_answer61) A first order reaction is 50% completed in 30 min at\[27{}^\circ C\]and in 10 min at\[47{}^\circ C\]. The energy of activation of the reaction is
question_answer63) \[{{C}_{7}}{{H}_{8}}\xrightarrow{3C{{l}_{2}},Heat}A\xrightarrow{Fe/B{{r}_{2}}}B\]\[\xrightarrow[{}]{Zn/HCl}C\] Here, the compound C is
question_answer66) The standard reduction potentials of Ag, Cu, Co and Zn are 0.799, 0.337, -0.277, -0.762 V respectively. Which of the following cells will have maximum cell emf?
question_answer71) An electron moving with velocity V is found to have a certain value of de-Broglie wavelength. The velocity to be possessed by the neutron to have the same de-Broglie wavelength is
question_answer72) A sample of rock from the moon contains equal number of atoms of uranium and lead (\[{{t}_{1/2}}\]for\[U=4.5\times {{10}^{9}}yr\]). The age of the rock would be
question_answer77) For resonance structure, a molecule should have (1) identical arrangement of atoms (2) nearly same energy content (3) the same number of paired electrons (4) identical bonding
question_answer79) Which of the following contain same number of molecules? 0.1 mol of\[C{{O}_{2}}\] 3.2g of\[{{O}_{2}}\] 0.1 g-atom of helium gas 11.2L of\[S{{O}_{2}}\]
question_answer80) Aqueous solution of following compounds are electrolyzed. Acetylene gas is obtained from (1) sodium acetate (2) sodium maleate (3) sodium succinate (4) sodium fumarate
question_answer81) Which of the following can be used to distinguish between 1-butyne and 2-butyne? (1) Grignard reagent (2) Ammoniacal\[AgN{{O}_{3}}\] (3) Ammoniacal\[C{{u}_{2}}C{{l}_{2}}\] (4) Baeyefs reagent
question_answer83) Which of the following statements are true? (1) Maltose forms an osazone (2) Lactose undergoes mutarotation (3) Galactose is a\[{{C}_{4}}-\]epimer of glucose (4) In starch, the glucose units are linked by \[\beta -\]linkages
question_answer84) Nitrogen (I) oxide is produced by (1) thermal decomposition of ammonium nitrate (2) disproportionation of\[{{N}_{2}}{{O}_{4}}\] (3) interaction of hydroxyl amine and nitrous acid (4) thermal decomposition of ammonium nitrite
question_answer85) Which of the following are outer orbital octahedral complexes? (1) \[{{[Fe{{F}_{6}}]}^{3-}}\] \[{{[Fe{{(CN)}_{6}}]}^{4-}}\] \[{{[Fe{{({{H}_{2}}O)}_{6}}]}^{2+}}\] \[{{[Fe{{(CN)}_{6}}]}^{3-}}\]
question_answer86) Which of the following undergoes aldol condensation? (1) Acetaldehyde (2) Propionaldehyde (3) Trideuteroacetaldehyde (4) Benzaldehyde
question_answer87) Addition of high proportions of manganese makes steel useful in making rails of rail roads, because manganese (1) gives hardness to steel (2) helps the formation of oxides of iron (3) can remove oxygen and sulphur (4) can show highest oxidation state of +7
question_answer89) Zn and Ag can be separated from each other by (1) distillation (2) heating with cone.\[NaOH\] (3) fractional distillation (4) treating with dil.\[HN{{O}_{3}}\]
question_answer90) Which of the following correctly represent/s the units of rate of reaction? (1)\[mol\,{{L}^{-1}}{{s}^{-1}}\] (2) \[L\,mol\text{ }{{s}^{-1}}\] (3) \[atm\text{ }{{s}^{-1}}\] (4)\[atm\,\,mo{{l}^{-1}}\text{ }{{s}^{-1}}\]
question_answer91) The electrolysis of aqueous solution of\[CuB{{r}_{2}}\] using platinum electrode would lead to the evolving of (1)\[B{{r}_{2}}\]gas at anode (2) \[B{{r}_{2}}\]gas at anode and\[{{O}_{2}}\]gas at cathode (3) copper (s) at cathode (4)\[{{H}_{2}}\]gas at cathode
question_answer92) For a binary solution of\[{{H}_{2}}O\]and\[C{{H}_{3}}C{{H}_{2}}OH,\] deviation from Raoult's law is observed. Which of the following is/are incorrect? (1) \[\Delta {{H}_{mixing}}<0\] (2) \[{{p}_{{{H}_{2}}O}}<p_{{{H}_{2}}O}^{o}{{\chi }_{{{H}_{2}}O}}\] (3) \[{{p}_{{{H}_{2}}O}}>p_{{{H}_{2}}O}^{o}{{\chi }_{{{H}_{2}}O}}\] (4) \[\Delta {{V}_{mixing}}>0\]
question_answer93) Which of the following will function as buffer? (1)\[NaCl+NaOH\] (2) Borax + Boric acid (3)\[Na{{H}_{2}}P{{O}_{4}}+NaHP{{O}_{4}}\] (4)\[N{{H}_{4}}Cl+N{{H}_{4}}OH\]
question_answer94) Select the correct statement(s). (1) If the shortest wavelength of H-atom in Lyman series is x, then the longest wavelength in Balmer series of\[H{{e}^{+}}\]ion is\[\frac{9x}{5}\] (2) When an electron jumps from 4th excited state to ground state, maximum number of photons that may be emitted are 4 (3) Number of nodal planes and radial nodes in\[4{{d}_{{{x}^{2}}-{{y}^{2}}}}\]orbital are 2 and 1 respectively (4) All four quantum numbers are obtained from Schrodinger wave equation when applied on atom
question_answer95) Which of the following compounds will show geometrical isomerism? (1) 2-butene (2) Propene (3) 1-phenylpropene (4) 2-methyl-2-butene
question_answer96) Which of the following molecules contain (s) only primary hydrogen atoms? (1) Neo-pentane (2) Neo-hexane (3) 2, 2, 3, 3-tetramethylbutane (4) 2, 2, 3-trimethylpentane
question_answer97) The oxy acid(s) of S having\[SS\]bond are/is (1)\[{{H}_{2}}{{S}_{2}}{{O}_{3}}\] (2)\[{{H}_{2}}{{S}_{2}}{{O}_{4}}\] (3) \[{{H}_{2}}{{S}_{2}}{{O}_{7}}\] (4)\[{{H}_{2}}{{S}_{2}}{{O}_{6}}\]
question_answer98) Which of the following statements are correct? (1) A triplet carbene is more stable than a singlet carbene (2) The carbocation,\[{{F}_{3}}C\overset{+}{\mathop{C}}\,\] is less stable than the carbocation,\[{{F}_{3}}\overset{+}{\mathop{C}}\,\] (3) Methyl carbanion is both isostructural and isoelectronic with ammonia (4) A singlet carbene is a paramagnetic species
question_answer100) Which of the following statements about \[{{[Fe{{({{H}_{2}}O)}_{5}}NO]}^{2+}}\]are correct? (1) O.S. of Fe is +1 (2) C.N. of Fe is 6 (3) Charge on NO is +1 (4) O.S. of Fe is +2
question_answer105) People living at sea level have around 5 million RBC per cubic millimetre of their blood whereas those living at an altitude of 5,400 metres have around 8 million. This is becuase at high altitude
A)
people get pollution-free air to breathe and more oxygen is available
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B)
atmospheric oxygen level is less and hence, more RBCs are needed to absorb the required amount of oxygen to survive
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C)
there is more UV radiation which enhances RBC production
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D)
people eat more nutritive food, therefore more RBCs are formed
question_answer122) Examination of blood of a person supsected of having anaemia, shows large, immature, nucleated erythrocytes without haemoglobin. Supplementing his diet with which of the following, is likely to alleviate his symptoms?
question_answer126) In class-Chondrichthyes (1) notochord is persistent through life (2) gill slits are separate and without operculum (3) skin is tough, containing minute placoid scales (4) tympanum represents ear
question_answer127) In the case of humans, the placenta comprises which of the following? (1) Endothelium of maternal blood capillaries (2) Endothelium of foetal blood capillaries (3) Foetal epithelium (4) Connective tissue surrounding foetal blood capillaries
question_answer128) Which of the following statements are correct? (1) Wings of insects and bats are analogous organs (2) Wings of insects and birds are analogous organs (3) Wings of birds and bats are homologous organs (4) Wings of insects and birds are homologous organs
question_answer129) In Cetacea, due to aquatic mode of life, which of the following characteristics are the adaptations that have taken place? (1) Loss of hair on the skin (2) Loss of sweat glands (3) Presence of thick blubber (4) Presence of swim bladder
question_answer130) Which of the following are tiger reserves under the project tiger? (1) Bandipur wildlife sanctuary (2) Manas wildlife sanctuary (3) Simlipal wildlife sanctuary (4) Keibaul Lamjao National Park
question_answer132) Which of the following statements are correct? (1) The classification of Protozoa is based on type of locomotory organelle (2) Tapeworm belongs to the phylum Platyhelminthes because it is triploblasdc and acoelomate (3) Tapeworm belongs to class-Cestoidea because its body consists of metameres (4) The protozoans of the class-Sarcodina possesses flagellum as the locomotory organelle
question_answer133) Which of the following statements are correct? (1) Dicondylic skull is charactersitic of all anamniotes (2) The jaw of placental mammal is formed by a single bone called dentary (3) Sweat glands are absent in Cetacea and Sirenict (4) The horn of Indian Rhinoceros is formed by gluing of epidermal keratin fibres
question_answer134) Placenta present in mammals acts as an endocrine tissue and produces (1) human chorionic gonadotropin (2) oestrogen (3) progesterone (4) testosterone
question_answer135) Select the correct statements about \[lac\] operon. (1) Glucose or galactose may bind with the represser and inactivate it (2) In the absence of lactose, the represser binds with the operator region (3) The Z-gene codes for permease (4) This was elucidated by Francois Jacob and Jacques Monod
question_answer136) Study the four statements given below and select the two correct ones out of them. (1) A lion eating a deer and sparrow feeding on grain are ecologically similar in being consumers (2) Predator star fish Pisaster helps in maintaining species diversity of some invertebrates (3) Predators ultimately lead to the extinction of prey species (4) Production of chemicals such as nicotine, strychnine by the plants are metabolic disorders
question_answer137) Which of the following statements about biomedical technologies are correct? (1) During open heart surgery, blood is circulated in the heart-lung machine (2) Blockage in coronary arteries is removed by angiography (3) Computerised Axial Tomography (CAT shows detailed internal structure as see- in a section of body (4) X-ray provides clear and detailed images of organs like prostate glands and lungs
question_answer138) Which of the following statements about certain desert animals such as kangaroo rat are true? (1) They have dark colour and high rate of reproduction and excrete solid urine (2) They feed on dry seeds and do not require drinking water (3) They do not drink water, breathe at a slow rate to conserve water and haw their body covered with thick hairs (4) They excrete very concentrated urine and do not use water to regulate body, temperature
question_answer139) Which of the following statements regarding a DNA segment 1,000 base pair long are correct? (1) It measures 3,400Å (2) It has 10 complete turns (3) The RNA synthesised from it carries nucleotides (4) It has 100 nucleotides
question_answer141) Which of the following statements are correct? (1) Grey matter surrounds the white matter in the spinal cord (2) Grey matter surrounds the white matter in the brain (3) White matter surrounds the grey matter in the spinal cord (4) White matter surrounds the grey matter in the brain
question_answer142) Which of the following pairs are correctly matched? (1) Poikilo-osmotic ?Animals show osmotic dependence with respect to the environment (2) Homio-osmodc?Animals maintain body fluid concentrations constant irrespective (of fluctuation in the environmental concentrations (3) Euryhaline?Animals with stand aquatic media of a wide range of concentrations (4) Stenohaline ?Animals survive within a wide range of salinities
question_answer143) Which of the following statements are correct? A marathon runner is likely to show (1) reduced heart rate (2) enlarged heart (3) larger stroke volume (4) decreased arterial blood pressure
question_answer145) Those attribute to recessive mutations in human beings include (1) phenylketonuria (2) galactosemia (3) duchenne muscular dystrophy (4) huntington's cholera
question_answer146) Which of the following statements are correct? (1) Histones are found in all organisms that have nuclei (2) Histones are remvoed temporarily during transcription (3) Any change in the amino acid sequenced of histone proteins is harmless for organism (4) There are eleven types of histones
question_answer147) Uremia (1) is the inflammation of glomeruli in kidney (2) is the accumulation of urea in blood (3) stone or insoluble mass of crystallized salts formed within the kidney (4) may lead to kidney failure
question_answer148) Myasthenia gravis (1) rapid spasms in muscle due to low \[C{{a}^{2+}}\]in body fluid (2) auto-immune disorder (3) inflammation of joints (4) affect neuromuscular junction
question_answer150) Aqueous chamber (1) space between the lens and the retina (2) space between cornea and the lens (3) contains a thin watery fluid (4) contains a transparent gel
question_answer174) What would be the number of chromosomes in the cells of the aleurone layer in a plant species with eight chromosomes in its synergids?
question_answer176) Segmental allopolyploids are the polyploids in which (1)the chromosomes are derived from different genomes (2) the chromosomes for multivalents during meiosis (3) the genomes involved are not quite different from one another (4) they carry markers
question_answer177) Which of the following are generated from genetically engineered microbes? (1) Insulin (2) Human growth hormone (3) Interferons (4) \[\text{HIV}\] surface antigens
question_answer180) Which of the following diseases are caused by fungi? (1) Root knot of sugar cane (2) Root rot of wheat (3) Angular leaf spot of cotton (4) Wilt of cotton
question_answer181) Tissue culture is recommended for (1) multiplication of elite genotypes of userultrees (2) developing virus free plants (3) production of secondary metabolites (4) induction of polyploidy
question_answer182) Which of the following pairs are correctly matched? (1) DNP?Respiratory uncoupler (2) Kranz anatomy?C4 plants (3)TCA cycle?Metabolic mill (4) Antimycin-A?Inhibitor of protein synthesis
question_answer184) Which of the following belong to the coenzymes of pyruvate dehydrogenase complex? (1) Pyridoxal phosphate (2) Thiamine pyrophosphate (3) Tetrahydrophoiate (4) Lipoic acid
question_answer185) The modern synthetic theory of evolution assumes a positive role of which of the following in evolution? (1) Natural selection (2) Acquired characters (3) Mutations (4) Artificial selection
question_answer187) Which of the following angiosperm families possess vessels in the wood? (1) Magnoliaceae (2) Degeneriaceae (3) Annonaceae (4) Winteraceae
question_answer188) The fungal element of which of these classes are involved in forming lichens? (1) Ascomycetes (2) Zygomycetes (3) Basidiomycetes (4) Deuteromycetes
question_answer189) Which of the following are present in the caw of gymnosperms? (1) Naked ovules (2) Haploid endosperm (3) Double fertilisation (4) Absence of tracheids
question_answer190) Which of the following statements are correct? (1) Orchids are monocotyledonous plants (2) Orchids have ornamental values (3) Some orchids are epiphytes (4) All orchids are autotrophs
question_answer191) The ex situ conservation of generic resources can be done through (1) tissue culture practices (2) maintenance of sanctuaries (3) the establishment of germplasm banks (4) the establishment of national parks
question_answer192) Which of the following regions of India are designated as biodiversity hot spots in India? (1)Western Himalaya (2) Eastern Himalaya (3) Eastern Ghats (4) Western Ghats
question_answer194) Which of the following codons are considered to be the termination codons in protein synthesis? (1) \[\text{UAA}\] (2) \[\text{UAC}\] (3) \[\text{UAG}\] (4) \[\text{AUC}\]
question_answer195) In case of double-stranded DNA, which of die following base ratios are equal to one ? (1) \[\text{(G+T)}\,\text{/(A}\,\text{+C)}\] (2) \[\text{(A+G)}\,\text{/(C}\,\text{+T)}\] (3) \[C\,\text{/G}\,\] (4) \[\text{(A+T)}\,\text{/(G}\,\text{+C)}\]
question_answer196) Which of the following measures could be taken to successfully grow chick pea in an area where bacterial blight disease is common? (1) Spray with Bordeaux mixture (2) Use of only disease free seeds (3) Control of the insect vector of the disease pathogen (4) Use of varieties resistant to the disease
question_answer197) Which of the following statements regarding the maintenance of carbon cycle in the biosphere are correct? (1) Plants utilise solar energy to convert CO2 and water into cellular materials and produce oxygen that animals consume (2) Energy used by an animal comes from the oxidation of plant material releasing CO2 and water (3) All decaying organic matter on the earth is ultimately degraded by moulds and bacteria to yield CO2 that escapes into the atmosphere (4) Oxygen produced by the plants during carbon assimilation is not a by-product
question_answer198) Conservation, preservation and further enhancement of vegetation cover on the earth would (1) reduce the green house effect (2) save valuable gene pools (3) reduce ecological backlashes (4) check thickening of the ozone layer
question_answer199) Which of the following pairs are correctly matched? (1) Assimilatory root?Photosynthesis (2) Fasciculated root? Food storage (3) Stilt root ?Mechanical support (4) Sucking root ? Absorption of moisture from the air
question_answer200) Which of these do not occur in thylakoids? (1) Oxygen evolution (2) Carbon dioxide fixation (3) NADPH formation (4) Chlorophyll biosynthesis