question_answer2) A metal plate 4 mm thick has a temperature difference of \[32{}^\circ C\] between its faces. It transmits 200 kcal/h through an area of \[5\,c{{m}^{2}}\]. Thermal conductivity of the material is
question_answer3) A balloon rises from rest with a constant acceleration g/8- A stone is relased from it when it has risen to height h. The time taken by the stone to reach the ground is
question_answer4) A uniform cylinder has a radius R and length L. If the moment of inertia of this cylinder about an axis passing through its centre and normal to its circular face is equal to the moment of inertia of the same cylinder about an axis passing through its centre and perpendicular to its length, then
A)
L = R
doneclear
B)
L = \[\frac{M{{L}^{2}}}{12}+\frac{M{{R}^{2}}}{4}=\frac{M{{R}^{2}}}{2}\] R
question_answer5) If the value of g at the surface of the earth is \[9.8\,\,/m/{{s}^{2}}\] then the value of g at a place 480 km above the surface of the earth will be (.radius of the earth is 6400 km)
question_answer6) If pressure of \[C{{O}_{2}}\] (real gas) in a container is given by \[p=\frac{RT}{2V-b}\,-\frac{9}{4{{b}^{2}}},\] then mass of the gas in container is
question_answer7) Two simple pendulums first of bob mass \[\therefore \] and length\[g=g\frac{{{R}^{2}}}{{{(R+h)}^{2}}}=\frac{9.8\times {{(6400)}^{2}}}{{{(6400+480)}^{2}}}\], second of bob mass \[=8.4m/{{s}^{2}}\] and length \[\left( P+\frac{{{\mu }^{2}}a}{{{V}^{2}}} \right)(V-\mu b)=\mu RT\] and\[P=\left( \frac{\mu RT}{V-\mu b} \right)-\frac{{{\mu }^{2}}a}{{{V}^{2}}}\]. If the vibrational energies of both are same. Then which is correct?
question_answer8) The mass and diameter of a planet are twice those of earth. The period of oscillation of pendulum on this planet will be (if it is a seconds pendulum on earth)
question_answer9) A cord is used to lower vertically a block of mass M by a distance d with constant downward acceleration \[m=\mu M=\frac{1}{2}\times 44=22g\]. Work done by the cord on the block is
question_answer10) A force F is applied on the wire of radius rand length L and change in the length of wire is I. If the same force F is applied on the wire of the same material and radius 2r and length 2L, then the change in length of the other wire is
question_answer11) When a copper voltmeter is connected with a battery of emf 12 V. 2 g of copper is deposited in 30 min. If the same voltmeter is connected across a 6 V battery then the mass of copper deposited in 45 min would be
question_answer12) A network of four capacitors of capacities equal to \[\sqrt{\frac{2h}{g}}\]and \[\sqrt{\frac{h}{g}}\] are connected to a battery as shown in the figure. The ratio of the charges on \[\sqrt{3}\] and \[\frac{R}{\sqrt{3}}\] is
question_answer13) The work functions for metals A, B and C are respectively 1.92 eV, 2.0 eV and 5 eV. According to Einsteins equation, the metal (s) which will emit photoelectrons for a radiation of wavelength 4100\[{{M}_{2}}\] is/are
question_answer16) If a vector \[{{L}_{2}}\,.\,{{M}_{1}}={{M}_{2}}\]is perpendicular to the vector \[{{L}_{1}}\,.\,2{{L}_{2}}\]ok, then the value of a is
question_answer17) When an ideal monoatomic gas is heated at consant pressure, fraction of heat energy supplied which increases the internal energy of gas, is
question_answer18) A body of mass m rises to a height h = \[-3Mg\frac{d}{4}\] from the earths surface where R is earths radius. If g is acceleration due to gravity at the earths surface, the increase in potential energy will be
question_answer19) A clock with a metal pendulum beating seconds keeps correct time at 0°C. If it loses 12.5 s a day at 25°C, the coefficient of linear expansion of metal pendulum is
question_answer20) A fork A has frequency 2% more than the standard fork and B has a frequency 3% less than the frequency of same standard fork. The forks A and B when sounded together produced 6 beats/s. The frequency of fork A is
question_answer21) A source of sound Sis moving with a velocity of 50 m/s towards a stationary observer. The observer measures the frequency of the source as 1000 Hz. What will be the apparent frequency of the source when it is moving away from the observer after crossing him? The velocity of the sound in the medium is 350 m/s.
question_answer22) A ball of mass 1 g and charge \[{{10}^{-8}}C\] moves from a point A. Where potential is 600 V to the point B where potential is zero. Velocity of the ball at the point B is 20 cm/s. The velocity of the ball at the point A will be
question_answer23) A charged oil drop of mass \[2.5\,\times {{10}^{-7}}kg\] is in space between the two plates, each of area \[2\times {{10}^{-2}}{{m}^{2}}\] of a parallel plate capacitor. When the upper plate has a charge of \[5\times {{10}^{-7}}C\] and the lower plate has an equal negative charge, the oil remains stationary. The charge of the oil drop is (Take \[g=10\,m/{{s}^{2}}\])
question_answer25) If two bulbs of wattages 25 and 100 W respectively each rated by 220 V are connected in series with the supply of 440 V, which bulb will fuse?
question_answer26) A square conducting loop of side length L carries a current\[2\mathbf{\hat{i}}+3\mathbf{\hat{j}}+8\mathbf{\hat{k}}\]. The magnetic field at the centre of the loop is
question_answer27) A thin magnetic needle vibrates in the horizontal plane with a period of 4 s. The needle is cut into two halves by a plane normal to magnetic axis of the needle. Then the period of vibration of each half needle is approximately
question_answer28) A coil in the shape of an equilateral triangle of side 0.02 m is suspended from its vertex such that it is hanging in a vertical plane between the pole pieces of permanent magnet producing a uniform field of 5x 10-2 T. If a current of 0.1 A is passed through the coil, what is the couple acting?
question_answer29) A rectangular coil of 20 turns and area of cross-section \[25\,c{{m}^{2}}\] has a resistance of 100\[-\frac{1}{2}\]. If a magnetic field which is perpendicular to the plane of the coil changes at a rate of 1000 T/s, the current in the coil is
question_answer30) An AC ammeter is used to measure current in a circuit. When a given direct current passes through the circuit, the AC ammeter reads 3 A. When another alternating current passes through the circuit, the AC ammeter reads 4 A. Then the reading of this ammeter, if DC and AC How through the circuit simultaneously, is
question_answer31) A transmitter transmits at a wavelegnth of 300 m. A condenser of capacitance \[2.4\,\mu F\] is being used. The value of the inductance for the resonant circuit is approximately
question_answer32) A capacitor of capacitance \[\frac{2}{5}\] is charged to a potential of 1 V. It is connected in parallel to an inductor of inductance 10-3 H. The maximum current that will flow in the circuit has the value
question_answer33) The wave of wavelength 5900 A emitted by any atom or molecule must have some finite total length which is known as coherence length. For sodium light, this length is 2.4 cm. The number of oscillations in this length will be
question_answer34) If a ray of light in a denser medium strikes a rarer medium at an angle of incidence i, the angles of reflection and refraction are respectively r and r. If the reflected and refracted rays are at right angles to each other, the critical angle for the given pair of media is
question_answer35) In a photocell, with exciting wavelength \[\frac{5}{6}\], the faster electron has speed v. If the exciting wavelength is changed to 3\[\frac{6}{7}\],/4, the speed of the fastest electron will be
question_answer36) Work function of nickel is 5.01 eV. When ultraviolet radiation of wavelength 2000\[9\times {{10}^{-1}}C\] is incident on electrons are emitted. What will be the maximum velocity of emitted electrons?
question_answer37) If 5% of the energy supplied to a bulb is irradiated as visible light, how many quanta are emitted per second by a 100 W lamp? (Assume wavelength of visible light as \[5.6\,\times {{10}^{-5}}cm\])
question_answer38) A 1 kg stone at the end of 1 m long string is whirled in a vertical circle at constant speed of 4 m/s. The tension in the string is 6 N, when the stone at \[(g=10\,m/{{s}^{2}})\]
question_answer40) In steel, the Youngs modulus and the strain at the breaking point are \[2\times {{10}^{11}}N/{{m}^{2}}\] and 0.15 respectively. The stress at the breaking point for steel is therefore
question_answer41) Assertion Torque on the coil is the maximum, when coil is suspended in a radial magnetic field. Reason The torque tends to rotate the coil on its own axis.
A)
if both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
doneclear
B)
if both Assertion and Reason are true but the Reason is nor the correct explanation of the Assertion
question_answer43) Assertion For an electric lamp connected in series with a variable capacitor and AC source; its brightness increases with increase in capacitance. Reason Capacitive reactance decreases with increase in capacitance of capacitor.
A)
if both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
doneclear
B)
if both Assertion and Reason are true but the Reason is nor the correct explanation of the Assertion
question_answer44) Assertion The specific charge for positive rays is a characteristic constant. Reason The specific charge depends on charge and mass of positive ions present in positive rays.
A)
if both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
doneclear
B)
if both Assertion and Reason are true but the Reason is nor the correct explanation of the Assertion
question_answer45) Assertion The mass of \[\frac{8}{3}V\]-particles when they are emitted is higher than the mass of electrons obtained by other means. Reason \[l\]-particle and electron, both are similar panicles.
A)
if both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
doneclear
B)
if both Assertion and Reason are true but the Reason is nor the correct explanation of the Assertion
question_answer46) Assertion NAND or NOR gates are called digital building blocks. Reason The repeated use of NAND (or NOR) gates can produce all the basic or complicated gates.
A)
if both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
doneclear
B)
if both Assertion and Reason are true but the Reason is nor the correct explanation of the Assertion
question_answer47) Assertion There is no dispersion of light refracted through a rectangular glass slab. Reason Dispersion of light is the phenomenon of splitting of a beam of white light into its constituent colors.
A)
if both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
doneclear
B)
if both Assertion and Reason are true but the Reason is nor the correct explanation of the Assertion
question_answer48) Assertion There is no effect of rotation of earth on acceleration due to gravity at poles. Reason Rotation of earth is about polar axis.
A)
if both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
doneclear
B)
if both Assertion and Reason are true but the Reason is nor the correct explanation of the Assertion
question_answer49) Assertion The change in kinetic energy of a particle is equal to the work done on it by the net force. Reason Change in kinetic energy of particle is equal to the work done only in case of a system of one particle.
A)
if both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
doneclear
B)
if both Assertion and Reason are true but the Reason is nor the correct explanation of the Assertion
question_answer50) Assertion A safe turn by a cyclist should neither be fast nor sharp. Reason The bending angle from the vertical would decrease with increase in velocity.
A)
if both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
doneclear
B)
if both Assertion and Reason are true but the Reason is nor the correct explanation of the Assertion
question_answer51) Assertion A table cloth can be pulled from a table without dislodging the dishes. Reason To every action there is an equal and opposite reaction.
A)
if both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
doneclear
B)
if both Assertion and Reason are true but the Reason is nor the correct explanation of the Assertion
question_answer52) Assertion If a gas container in motion is suddenly stopped, the temperature of the gas rises. Reason The kinetic energy of ordered mechanical motion is converted into the kinetic energy of random motion of gas molecules.
A)
if both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
doneclear
B)
if both Assertion and Reason are true but the Reason is nor the correct explanation of the Assertion
question_answer53) Assertion Like light radiation, thermal radiations are also electromagnetic radiation. Reason The thermal radiations require no medium for propagation.
A)
if both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
doneclear
B)
if both Assertion and Reason are true but the Reason is nor the correct explanation of the Assertion
question_answer54) Assertion The percentage change in time period is 1.5% if the length of simple pendulum increases by 3%. Reason Time period is directly proportional to length of pendulum.
A)
if both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
doneclear
B)
if both Assertion and Reason are true but the Reason is nor the correct explanation of the Assertion
question_answer55) Assertion The fundamental frequency of an open organ pipe increases as the temperature is increased. Reason As the temperature increases, the velocity of sound increases more rapidly than length of the pipe.
A)
if both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
doneclear
B)
if both Assertion and Reason are true but the Reason is nor the correct explanation of the Assertion
question_answer56) Assertion A paramagnetic sample displays greater magnetization (for the same magnetizing field) when cooled. Reason The magnetization does not depend on temperature.
A)
if both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
doneclear
B)
if both Assertion and Reason are true but the Reason is nor the correct explanation of the Assertion
question_answer57) Assertion: The quantity\[5\sqrt{3}\times {{10}^{-7}}N-m\] possesses dimensions of time. Reason To reduce the rate of increase of current through a solenoid should increase the time constant\[5\sqrt{3}\times {{10}^{-10}}N-m\]
A)
if both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
doneclear
B)
if both Assertion and Reason are true but the Reason is nor the correct explanation of the Assertion
question_answer58) Assertion The threshold frequency of photoelectric effect supports the particle nature of sunlight Reason If frequency of incident light is less than the threshold frequency, electrons are not emitted from metal surface.
A)
if both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
doneclear
B)
if both Assertion and Reason are true but the Reason is nor the correct explanation of the Assertion
question_answer59) Assertion The average velocity of the object over an interval of time is either smaller than or equal to the average speed of the object over the same interval. Reason Velocity is a vector quantity and speed is a scalar quantity.
A)
if both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
doneclear
B)
if both Assertion and Reason are true but the Reason is nor the correct explanation of the Assertion
question_answer60) Assertion Microwave propagation is better than the sky wave propagation. Reason Microwaves have frequencies 100 to 300 GHz, which have very good directional properties.
A)
if both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
doneclear
B)
if both Assertion and Reason are true but the Reason is nor the correct explanation of the Assertion
question_answer64) 0.037 g of an alcohol, \[R-OH\] was added to \[{{C}_{2}}{{H}_{5}}MgI\] and the gas evolved measured \[11.2\text{ }cc\] at STP. The molecular mass of \[R-OH\]will be
question_answer65) If the photon of the wavelength 150 pm strikes an atom and one of its inner bound electrons is ejected out with a velocity of \[1.5\times {{10}^{7}}m{{s}^{-1}},\] what is the energy with which it is bound to the nucleus?
question_answer66) Consider the sequence of oxides: \[N{{a}_{2}}O,Si{{O}_{2}},\] \[{{P}_{4}}{{O}_{10}}.\]. Which factor decreases from \[N{{a}_{2}}O\] to \[Si{{O}_{2}}\] and also from \[Si{{O}_{2}}\] to \[{{P}_{4}}{{O}_{10}}\]?
question_answer69) \[{{[CoC{{l}_{2}}{{(N{{H}_{3}})}_{4}}]}^{+}}+C{{l}^{-}}\xrightarrow{{}}\] \[[CoC{{l}_{3}}{{(N{{H}_{3}})}_{3}}]+N{{H}_{3}}\] In the reaction only one isomer of complex product is obtained. The initial complex is
question_answer72) At a certain temperature, the first order rate constant, \[{{k}_{1}}\] is found to be smaller than the second order rate constant, \[{{k}_{2}}\]. If the energy of activation, \[{{E}_{1}}\] of the first order reaction is greater than energy of activation, \[{{E}_{2}}\] of the second order reaction then with increase in temperature
A)
\[{{k}_{1}}\] will increase faster than\[{{k}_{2}}\] , but always will remain less than \[{{k}_{2}}\]
doneclear
B)
\[{{k}_{2}}\] will increase faster than \[{{k}_{1}}\]
doneclear
C)
\[{{k}_{1}}\] will increase faster than \[{{k}_{2}}\] and becomes equal to \[{{k}_{2}}\]
doneclear
D)
\[{{k}_{1}}\]will increase faster than \[{{k}_{2}}\] and becomes greater than \[{{k}_{2}}\]
question_answer74) An alkyl chloride (A) on reaction with magnesium in dry ether followed by treatment with ethanol gave 2-methylbutane. Give the possible structure of A
question_answer81) \[{{(C{{H}_{3}})}_{2}}C=O+HCN\xrightarrow{{{H}^{+}}}\xrightarrow{{{H}_{3}}{{O}^{+}}}\] \[\underset{(ii)\,PC{{l}_{5}}}{\mathop{\xrightarrow[\Delta ]{(i)\,{{H}_{2}}S{{O}_{4}}}}}\,\xrightarrow[(ii)\,{{H}_{2}}{{O}_{2}},O{{H}^{-}}]{(i)\,B{{H}_{3}}-THF}\]product The final predominant product is
question_answer83) The following equilibria are given I. \[{{N}_{2}}+3{{H}_{2}}\rightleftharpoons 2N{{H}_{3}};{{K}_{1}}\] II. \[{{N}_{2}}+{{O}_{2}}\rightleftharpoons 2NO;{{K}_{2}}\] III. \[{{H}_{2}}+\frac{1}{2}{{O}_{2}}\rightleftharpoons {{H}_{2}}O;{{K}_{3}}\] The equilibrium constant for the reaction, \[2N{{H}_{3}}+\frac{5}{2}{{O}_{2}}\rightleftharpoons 2NO+3{{H}_{2}}O\] in terms of \[{{K}_{1}},{{K}_{2}}\] and \[{{K}_{3}}\] will be
question_answer84) The root mean square velocity of one mole of a monatomic gas having molar mass M is \[{{U}_{rms}}\]. The relation between the average kinetic energy (E) of the gas and \[{{U}_{rms}}\]is
question_answer86) Carbohydrates which differ in configuration at the glycosidic carbon (ie, \[{{C}_{1}}\]in aldose and \[{{C}_{2}}\] in ketoses) are called
question_answer92) If the concentration of \[CrO_{4}^{2-}\] ions in a saturated solution of silver chromate is \[2\times {{10}^{-4}}M\], the solubility product of silver chromate would be
question_answer98) The correct order of decreasing acid strength of trichloroacetic acid (A) trifluoroacetic acid (B), benzoic acid (C) and formic acid (D) is
question_answer99) The correct order of basic strength of \[C{{H}_{3}}N{{H}_{2}}(I),\] \[{{(C{{H}_{3}})}_{2}}NH(II),\] \[{{(C{{H}_{3}})}_{3}}N(III),\] \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}N{{H}_{2}}\] in gaseous phase is
question_answer101) Assertion: One molar aqueous solution has always higher concentration than one molal. Reason: The molality of a solution depends upon the density of the solution whereas molarity does not.
A)
If both Assertion: and Reason: are true and the Reason: is the correct explanation of the Assertion:
doneclear
B)
If both Assertion: and Reason: are true but the Reason: is not the correct explanation of the Assertion:
question_answer102) Assertion: The heat adsorbed during isothermal expansion of an ideal gas against vacuum is zero. Reason: The volume occupied by the molecule is zero.
A)
If both Assertion: and Reason: are true and the Reason: is the correct explanation of the Assertion:
doneclear
B)
If both Assertion: and Reason: are true but the Reason: is not the correct explanation of the Assertion:
question_answer103) Assertion: If edge length of unit cell of \[LiCl\], having \[NaCl\] type structure, is \[5.14\overset{\text{o}}{\mathop{\text{A}}}\,\], the ionic radius of \[C{{l}^{-}}\] ion is \[1.82\overset{\text{o}}{\mathop{\text{A}}}\,\]. Reason: Anion-anion contact is retained in \[LiCl\] structure because anions constitute the lattice.
A)
If both Assertion: and Reason: are true and the Reason: is the correct explanation of the Assertion:
doneclear
B)
If both Assertion: and Reason: are true but the Reason: is not the correct explanation of the Assertion:
question_answer107) Assertion: Only principal quantum number determines the energy of an electron in an orbital in Na atom. Reason: For one electron system, the expression of energy is quite different as that obtained in Bohrs theory.
A)
If both Assertion: and Reason: are true and the Reason: is the correct explanation of the Assertion:
doneclear
B)
If both Assertion: and Reason: are true but the Reason: is not the correct explanation of the Assertion:
question_answer108) Assertion: The \[HF_{2}^{-}\] ions exists in the solid state and also in liquid state but not in aqueous solution. Reason: The magnitude of hydrogen bonds in between \[HF-HF\] molecule is weaker than that in between \[HF\] and \[{{H}_{2}}O\] molecules.
A)
If both Assertion: and Reason: are true and the Reason: is the correct explanation of the Assertion:
doneclear
B)
If both Assertion: and Reason: are true but the Reason: is not the correct explanation of the Assertion:
question_answer109) Assertion: Chlorine when solidifies does not have zero entropy even at absolute zero. Reason: Chlorine is a pungent smelling gas and it is difficult to solidify it.
A)
If both Assertion: and Reason: are true and the Reason: is the correct explanation of the Assertion:
doneclear
B)
If both Assertion: and Reason: are true but the Reason: is not the correct explanation of the Assertion:
question_answer114) Assertion: Vulcanisation increases the hardness of natural rubber, Reason: Vulcanisation introduces the polysulphide bridges at reactive sites.
A)
If both Assertion: and Reason: are true and the Reason: is the correct explanation of the Assertion:
doneclear
B)
If both Assertion: and Reason: are true but the Reason: is not the correct explanation of the Assertion:
question_answer115) Assertion: The oxidation of ketone by perbenzoic acid gives esters. Reason: Perbenzoic acid oxidises because of the release of nascent oxygen on dissociation.
A)
If both Assertion: and Reason: are true and the Reason: is the correct explanation of the Assertion:
doneclear
B)
If both Assertion: and Reason: are true but the Reason: is not the correct explanation of the Assertion:
question_answer116) Assertion: \[N_{3}^{-}\] is a weaker base than \[NH_{2}^{-}\]. Reason: The lone pair of electrons on N atom in \[N_{3}^{-}\]is in a \[s{{p}^{2}}\]-orbital while in \[NH_{2}^{-}\] it is in an \[s{{p}^{3}}\] -orbital.
A)
If both Assertion: and Reason: are true and the Reason: is the correct explanation of the Assertion:
doneclear
B)
If both Assertion: and Reason: are true but the Reason: is not the correct explanation of the Assertion:
question_answer117) Assertion: \[{{S}_{N}}\text{l}\] reaction is basically a solvolysis reaction. Reason: Polar protic solvents help the substrate to ionise and by the way get involved in \[{{S}_{N}}\text{l}\] reaction.
A)
If both Assertion: and Reason: are true and the Reason: is the correct explanation of the Assertion:
doneclear
B)
If both Assertion: and Reason: are true but the Reason: is not the correct explanation of the Assertion:
question_answer118) Assertion: In the E2 elimination, \[\beta -H\] and leaving group should be antiperiplanar. Reason: In the E2 elimination, base always abstracts unhindered \[\beta -H\].
A)
If both Assertion: and Reason: are true and the Reason: is the correct explanation of the Assertion:
doneclear
B)
If both Assertion: and Reason: are true but the Reason: is not the correct explanation of the Assertion:
question_answer119) Assertion: 2, 2-dimethyl propanal give Cannizaro reaction with concentrated \[NaOH\]. Reason: Cannizaro is a disproportionate reaction.
A)
If both Assertion: and Reason: are true and the Reason: is the correct explanation of the Assertion:
doneclear
B)
If both Assertion: and Reason: are true but the Reason: is not the correct explanation of the Assertion:
question_answer120) Assertion: A primary amine has higher boiling point than any tertiary amine. Reason: A tertiary amine has greater number of \[N-H\]bonds for H-bonding.
A)
If both Assertion: and Reason: are true and the Reason: is the correct explanation of the Assertion:
doneclear
B)
If both Assertion: and Reason: are true but the Reason: is not the correct explanation of the Assertion:
question_answer121) Appearance of dark-colored pepper moths among the light-colored ones as a result of increased industrial pollution is an example of
question_answer135) The floral formula \[\oplus _{\begin{smallmatrix} O \\ + \end{smallmatrix}}^{\nearrow }{{K}_{2}}{{+}_{2}}{{C}_{4}}{{A}_{2}}{{+}_{4}}{{G}_{(2)}}\]represents
question_answer148) If a segment of an mRNA molecule has the sequence S GUACCGAUCG 3, which of the following could have been the template DNA molecule?
question_answer153) If Darwins theory of pangenesis shows similarity with theory of inheritance of acquired characters then what shall be correct according to it?
A)
Useful organs become strong and developed while useless organs become extinct. These organs help in struggle for survival
doneclear
B)
Size of organs increase with ageing
doneclear
C)
Development of organs is due to will power
doneclear
D)
There should be some physical basis of inheritance
question_answer161) Assertion Glycine, an amino acid, comes under the category of non-essential amino acids. Reason The fact behind it is that glycine cannot be synthesized in the body.
question_answer162) Assertion The rate of decomposition of detritus is reduced in the regions of high altitude. Reason It happens due to immobilisation of nutrients.
question_answer163) Assertion Green-house effect is due to thick layer of carbon dioxide. Reason The glass panels of a green-house allowing the sunlight to filter through but preventing the heat from being re-radiated in outer space.
question_answer164) Assertion Mammals, living in deserts contain more concentrated urine. Reason They contain very long loop of Henle in their nephrons.
question_answer165) Assertion The functional unit of excretory organs of lobsters is nephron. Reason The filtration of blood occur in the Malpighian body (the glomerulus and Bowmans capsule).
question_answer166) Assertion Open circulatory system is found in most arthropods. Reason Arthropods contain haemolymph which directly bathes internal tissues and organs.
question_answer169) Assertion Glycolysis begins in cytoplasm and yields two molecules of pyruvate. Reason During glycolysis, four ATP molecules are produced and net yield is only two ATP molecules.
question_answer170) Assertion Mechanical tissues are absent or less developed in the floating and submerged parts of hydrophytic plants. Reason Generally, elongated and loosely arranged spongy cells are found in the body of submerged hydrophytic plants.
question_answer171) Assertion Inhibition of death of one organism by another through the production of some by-products is known as antibiosis. Reason Antibiosis is a type of negative interaction.
question_answer172) Assertion Holoblastic cleavage with almost equal-sized blastomeres is a characteristic of placental animals. Reason Eggs of most mammals, including humans are of centrolecithal type.
question_answer173) Assertion Only a single functional female gamete is formed from each primary oocyte cell. Reason Meiosis in each primary oocyte gives rise to only one cell which functions as ovum.
question_answer174) Assertion Cytochrome oxidase enzyme contains copper. Reason Cyanide combines with the copper of cytochrome oxidase and prevents oxygen combining with it.
question_answer176) Assertion Conducting tissues, especially xylem show greatest reduction in submerged hydrophytes. Reason Hydrophytes live in water so no need of tissues.
question_answer177) Assertion Fructose-1, 6 diphosphate is converted into glyceraldehyde-3-phosphate and dihydroxyacetone-3-phosphate. Reason Conversion of fructose-1, 6 diphosphate into 3-phosphoglyceraldehyde and dihydroxyacetone-3-phosphate is facilitated by the enzyme aldolase.
question_answer178) Assertion Process of maintaining a constant internal environment is known as homeostasis. Reason Kidneys are excretory and homeostatic organs.
question_answer179) Assertion Organochlorine pesticides are organic compounds that have been chlorinated. Reason Fenitrothion is one of the organochlorine pesticides.
question_answer180) Assertion Thick layers of muscles are present in the wall of alimentary canal. Reason These muscles help in the mixing of food materials with the enzymes coming from different glands in the alimentary canal.
question_answer181) Which of the following professor received the Physics Nobel Prize for 2009 for his ground breaking achievements concerning the transmission of light in fibers for optical communication?
question_answer184) On which day is annual Pravasi Bharatiya Divas celebrated to commemorate the day when Mahatma Gandhi returned from South Africa in 1915?
question_answer185) Avatar has become the highest grossing movie of all time, surpassing the record made by Titanic. Who has directed both Avatar and Titanic?