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In air, the value of the total electric flux emitted from unit positive charge is
In a capacitor of capacitance C, charge Q and energy W are stored. If charge is increased to 2 Q, the energy stored will be
A spherical drop of capacitance 1µF is broken into eight drops of equal radius. Then, the capacitance of each small drop will be
A gang capacitor is formed by interlocking a number of plates as shown in the figure. The distance between the consecutive plates is 0.885 cm and the overlapping area is 5 cm2. The capacity of the unit is
A small uncharged metallic sphere is positioned exactly at a point midway between two equal and opposite point charges. If the sphere is slightly displaced towards the positive charge and released, then
A charge Q is divided into two parts of q and Q - q. If the coulomb repulsion between them when they are separated is to be maximum, the ratio Q/q should be
Which one of the following is not made of soft iron?
A bar magnet of magnetic moment 104 J/T is free to rotate in a horizontal plane. The work done in rotating the magnet slowly from a direction parallel to a horizontal magnetic field of 4 × 10-5 T to a direction of 60° from the field will be
A wire mesh consisting of very small squares is viewed at a distance of 8 cm through a magnifying converging lens of focal length 10 cm, kept close to the eye. The magnification produced by the lens is
A step down transformer is used on a 1000 V line to deliver 20 A at 120 V at the secondary coil. If the efficiency of the transformer is 80%, the current drawn from the line is
As shown in the figure, a magnet is moved with a fast speed towards a coil at rest. Due to this, induced emf, induced current and induced charge in the coil are F, I and Q, respectively. If the speed of the magnet is doubled, the incorrect statement is
An ideal coil of 10 H is joined in series with a resistance of 5Ω and a battery of 5 V. 2 seconds after joining, the current flowing (in ampere) in the circuit will be
If emf E = 4 cos 1000 t volt is applied to an L-R circuit of inductance 3 mH and resistance 4Ω, the amplitude of current in the circuit will be
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 x 10-5 cm)
What will be the number of photons emitted per second by a 10 W sodium vapour lamp assuming that 90% of the consumed energy is converted into light? [Wavelength of sodium light is 590 nm, and h = 6.63 x 10-34 J-s]
A ball of mass m hits the frictionless floor with a speed v making an angle of incidence θ with the normal. The coefficient of restitution is e = 1. The speed of reflected ball and the angle of reflection of the ball will respectively be
The wave of wavelength 5900 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
The ratio of intensities between two coherent sound sources is 4 : 1. The difference of loudness in decibels between maximum and minimum intensities, when they interfere in space, is
The X-ray tube is operated at 50 kV. The minimum wavelength produced is
The Kα line from molybdenum (atomic number = 42) has a wavelength of 0.7078 . The wavelength of Kα line of zinc (atomic number = 30) will be
Water level is maintained in a cylindrical vessel up to a fixed height H. The vessel is kept on a horizontal plane. At what height above the bottom should a hole be made in the vessel, so that the water stream coming out of the hole strikes the horizontal plane of the greatest distance from the vessel?
The half-life of 196Au is 2.7 days. What is its average life?
The Boolean expression P + where P and Q are the inputs of the logic circuit, represents
The above given table is a truth table for
The force F is given by the expression F = A cos(Bx) + C sin(Dt), where x is the displacement and t is the time.
Then, the dimensions of are the same as that of the
A rocket is fired upwards from the earth surface such that it creates an acceleration of 19.6 m/s2. If after 5 s, its engine is switched off, the maximum height of the rocket from earth's surface would be
A body of mass 0.5 kg is projected under gravity with a speed of 98 m/s at an angle of 60o with the horizontal. The magnitude of change in momentum of the body from the point of launch to its highest point
A 60 kg weight is dragged on a horizontal surface by a rope through a distance of 2 m. If the coefficient of friction () is 0.5, the angle of rope with the surface is 60° and g = 9.8 m/s2, then the work done is
If the Earth stops moving around its polar axis, then what will be the effect on the weight of a body placed at the south-axis?
A thin hollow sphere of mass m is completely filled with a liquid of mass m. When the sphere rolls with a velocity v, the kinetic energy of the system is (Neglect friction)
A marble block of mass 2 kg lying on ice when given a velocity of 6 m/s is stopped by friction in 10 s. Then, the coefficient of friction is
A body of mass 0.25 kg is projected with muzzle velocity 100 m/s from a tank of mass 100 kg. What is the recoil velocity of the tank?
A horizontal tube of length l closed at both ends contains an ideal gas of molecular weight M. The tube is rotated at a constant angular velocity ω about a vertical axis passing through an end. Assume the temperature to be uniform and constant. If p1 and p2 denote the pressure respectively at free and the fixed ends, then choose the correct relation.
If the terminal speed of a sphere of gold (density = 19.5 kg/m3) is 0.2 m/s in viscous liquid (density = 1.5 kg/m3), find the terminal speed of a sphere of silver (density = 10.5 kg/m3) of the same size in the same liquid.
In an isobaric process of an ideal gas, the ratio of heat supplied (Q) and work done (W) is
When an ideal monatomic gas is heated at constant pressure, the fraction of heat energy supplied which increases the internal energy of gas is
A particle is executing a linear simple harmonic motion of amplitude A. What fraction of the total energy is kinetic when the displacement is half the amplitude?
Two simple harmonic motions are represented by and The resultant amplitude is
A point source emits sound equally in all directions in a non-absorbing medium. Two points P and Q are at distances of 2 m and 3 m respectively from the source. The ratio of the intensities of the waves at P and Q is
Velocity of sound waves in air is 330 m/s. For a particular sound in air, a path difference of 40 cm is equivalent to a phase difference of 1.6 π. The frequency of the wave is
Assertion: A metallic shield in the form of a hollow shell may be built to block an electric field.
Reason: In a hollow spherical shield, the electric field inside it is zero at every point.
Assertion: Though large number of free electrons are present in the metal, there is no current in the absence of electric field.
Reason: In the absence of electric field, electrons move randomly in all directions.
Assertion: The value of temperature coefficient of resistance is positive for metals.
Reason: The temperature coefficient of resistance for insulator is also positive.
Assertion: If an electron and a proton enter in a perpendicular magnetic field with an equal momentum, then the radius of curve for the electron is more than that for the proton.
Reason: An electron has less mass than a proton.
Assertion: Susceptibility is defined as the ratio of intensity of magnetisation I to magnetic intensity H.
Reason: The greater the value of susceptibility, the smaller the value of intensity of magnetisation I.
Assertion: Like light radiation, thermal radiation is also electromagnetic radiation.
Reason: Thermal radiation requires no medium for propagation.
Assertion: Photoelectric emission is an instantaneous process.
Reason: There is no time lag between incidence of light and emission of photoelectron.
Assertion: A biconvex lens of focal length 10 cm is split into two equal parts by a plane parallel to its principal axis. The focal length of the each part will be 20 cm.
Reason: Focal length depends on the radii of curvature of two surfaces.
Assertion: The thick film shows no interference pattern. Take thickness of the order of few centimetres.
Reason: For interference pattern to observe, path difference between two waves is of the order of few wavelengths.
Assertion: When a body is dropped or thrown horizontally from the same height, it would reach the ground at the same time.
Reason: Horizontal velocity has no effect on the vertical direction.
Assertion: Two similar trains are moving along the equatorial line with the same speed but in opposite directions. They will exert equal pressure on the rails.
Reason: In uniform circular motion, the magnitude of acceleration remains constant but the direction continuously changes.
Assertion: In an elastic collision between two bodies, the energy of each body is conserved.
Reason: The total energy of an isolated system is conserved.
Assertion: The speed of whirlwind in a tornado is alarmingly high.
Reason: If no external torque acts on a body, its angular velocity remains conserved.
Assertion: A thin stainless steel needle can lay floating on a still water surface.
Reason: Any object floats when the buoyancy force balances the weight of the object.
Assertion: A satellite moving in a circular orbit around the Earth has a total energy and then, its potential energy is –.
Reason: Potential energy of the body at a point in a gravitational field of orbit is
Assertion: In an isolated system, the entropy increases.
Reason: The processes in an isolated system are adiabatic.
Assertion: The fundamental frequency of an open organ pipe increases as the temperature is increased.
Reason: As the temperature is increased, the velocity of sound increases more rapidly than length of the pipe.
Assertion: The Carnot cycle is useful in understanding the performance of heat engines.
Reason: The Carnot cycle provides a way of determining the maximum possible efficiency achievable with reservoirs of given temperatures.
Assertion: Owls can move freely during night.
Reason: They have large number of rods on their retina.
Assertion: In a stationary wave, there is no transfer of energy.
Reason: The ratio of kinetic energy to potential energy is independent of the position.
Percentage of free space in a body centred cubic unit cell is
The vapour pressure of 100 g water reduces from 3000 Nm–2 to 2985 Nm–2 when 5 g of substance ‘X’ is dissolved in it. The substance ‘X’ is
A solution with negative deviation among the following is
If x is the amount of adsorbate and m is the amount of adsorbent, then which of the following relations is notrelated to the adsorption process?
Which of the following pairs of metals is purified by Van Arkel method?
Which of the following dissolves in water but does not give any oxyacid solution?
Which of the following metals do not give a metal nitrate on treatment with concentrated HNO3?
The species having tetrahedral shape is
The relationship(s) between K, β1,β2 and β3 is/are
An alkyl chloride (A) on reaction with magnesium in dry ether followed by treatment with ethanol gave 2-methylbutane. Give the possible structure(s) of ‘A’.
Salol is
How many structures of X are possible?
When a mixture of 1-hexanol and hexanoic acid in diethyl ether is shaken with an aqueous NaHCO3 solution, then which of the following is the correct composition of the mixture after the reaction?
Acetone can easily be converted into propane by the action of
Acetic acid on heating with P2O5 produces
Which of the following amines will not undergo carbylamine reaction?
Which of the following does not exist as a zwitter ion?
In DNA, the complementary bases are
Plexiglass is a commercial name of
Buna–N, a synthetic rubber, is a copolymer of
1021 molecules are removed from 200 mg of CO2. The number of moles of CO2 left is
For preparing 3.00 L of 1 M NaOH, stock solutions A and B of 2.50 M NaOH and 0.40 M NaOH are mixed, respectively. Find the amount of B stock solution added.
If a photon of wavelength 150 pm strikes an atom and one of its inner bound electrons is ejected with a velocity of 1.5 x 107 ms-1, then what is the energy with which it is bound to the nucleus?
The C—H bond distance is longest in
The density of air is 0.001293 g/cc at STP. Its vapour density is
It is given that the reduced temperature , the reduced pressure , and the reduced volume . The reduced equation of the state may be given as
The difference between heat capacity at constant pressure and heat capacity at constant volume for the combustion of carbon monoxide at 27o C will be
The enthalpy of hydrogenation of cyclohexene is – 119.5 kJ mol-1. If resonance energy of benzene is – 150.4 kJ mol–1, its enthalpy of hydrogenation would be
What would be the amount of heat released when an aqueous solution containing 0.5 moles of HNO3 is mixed with 0.3 moles of OH–?
(Enthalpy of neutralisation = –57.1 kJ)
At 25 oC, the pH of a solution containing 0.10 M sodium acetate and 0.03 M acetic acid is
[pKa value of CH3COOH = 4.57]
In this reaction,
Which of the following is not a reducing agent?
The correct order of hydration energy of alkali metal is
The catenation tendencies of C, Si and Ge are in the order Ge < Si < C. The bond energies (in kJ mol–1) of C–C, Si–Si and Ge–Ge bonds respectively are
Which of the following compounds is the most stable?
In sulphur detection of an organic compound, sodium nitroprusside solution is added to sodium extract. The formation of violet colour is due to
The presence of halogen in organic compounds can be detected using
Nessler’s reagent is used for the test of
X, Y and Z respectively are :
Angle strain in cyclopropane is
Assertion: If edge length of unit cell of LiCl, having NaCI type structure, is 5.14 , the ionic radius of Cl- ion is 1.82 .
Reason: Anion-anion contact is retained in LiCl structure because anions constitute the lattice.
Assertion: The order of a reaction can have fractional value.
Reason: The order of a reaction cannot be written from balanced equation of a reaction.
Assertion: Graphite is a good conductor of heat and electricity.
Reason: Graphite has all the electrons firmly held together in C–C σ -bonds.
Assertion: The solution of Na2CrO4 in water is intensely coloured.
Reason: Oxidation state of Cr in Na2CrO4 is +6.
Assertion: CO and CN are referred to as π acid ligands.
Reason: In CO and CN, vacant π type orbitals are present.
Assertion: Benzyl bromide when kept in acetone water produces benzyl alcohol.
Reason: The reaction follows SN2 mechanism.
Assertion: Benzaldehyde is less reactive in comparison to ethanol towards nucleophilic attack.
Reason: All the carbon atoms of benzaldehyde are sp2 hybridised.
Assertion: The reaction of alcohols with SOCI2 is catalysed by the presence of a tertiary amine (R3N).
Reason: Tertiary amine promotes the reaction by reacting with the by-product HCI.
Assertion: DNA molecules and RNA molecules are found in the nucleus of a cell.
Reason: On heating, the enzymes do not lose their specific activity.
Assertion: The micelle formed by sodium stearate in water has –COO– groups at the surface.
Reason: Surface tension of water is reduced by the addition of stearate.
Assertion: A spectral line will be observed for a 2px – 2py transition.
Reason: The energy is released in the form of wave of light when electron drops from 2px to 2py orbital.
Assertion: [AI(H2O)6]3+ is a stronger acid than [Mg(H2O)6]2+.
Reason: The size of [AI(H2O)6]3+ is smaller than [Mg(H2O)6]2+ and it possesses more effective nuclear charge.
Assertion: CCI4 and H2O are immiscible.
Reason: CCI4 is a polar solvent.
Assertion: For the reaction: N2(g) + 3H2 (g) ⇌ 2NH3(g), Unit of Kc = L2 mol–2
Reason: For the reaction: N2(g) + 3H2(g) ⇌ 2NH3(g), Equilibrium constant,
Assertion: The O–O bond length in H2O2 is shorter than in O2F2.
Reason: H2O2 is an ionic compound.
Assertion: CaF2 has been given the name fluorspar.
Reason: Solid CaF2 emits light when heated.
Assertion: Benzene is reactive, while inorganic benzene is unreactive compound.
Reason: Organic benzene is borazine, B3N3H6.
Assertion: gives red colour in Lassaigne’s test.
Reason: Compounds having N along with C give red colour with Lassaigne’s test.
Assertion: Friedel-Crafts reaction of benzene with n-propyl chloride, on heating, produces isopropyl benzene.
Reason: Benzene undergoes electrophilic substitution easily.
Assertion: Photochemical smog is produced by nitrogen oxides.
Reason: Vehicular pollution is a major source of nitrogen oxides.
In Ulothrix, meiosis takes place in
In the given diagram, the parts labelled as A, B, C, D, E and F respectively are indentified as
In which one of the following would you expect to find glyoxysomes?
The nature of megasporophyll of Cycas is similar to
Which of the following hormones is secreted by implanted blastocyst, that acts on the corpus luteum in the ovary, stimulating the body to produce estrogens and progesterone to maintain the uterine lining?
A cross section at the midpoint of the middle piece of a human sperm will show
Which one of the following patterns of inheritance is consistent with this pedigree?
Lysis of foreign cell is mediated through
Streptomycin is obtained from
Hargobind Khorana also contributed to genetic engineering by synthesising
Which of the following pairs is correctly matched?
The Great Barrier Reef along the east coast of Australia can be categorised as
Which of the following workers are related as ecologist, palaeobotanist are embryologist, respectively?
Biosphere reserves differ from national parks and wildlife sanctuaries because in the former,
The government of India in 1980s has introduced a concept to work closely with the local communities for protecting and managing forests. The concept is:
Flagella of prokaryotic and eukaryotic cells differ in
Myxomycetes are
From which of the following plants is a medicine for respiratory disorders obtained?
During unfavourable conditions, the sponges form
Which one of the following animals is correctly matched with its one characteristic and the taxon?
Which set includes pathogenic Arthropods?
Which of the following plants is correctly matched with its three characteristics?
The type of epithelial cells which line the inner surface of fallopian tubes, bronchioles and small bronchi, are known as
The ability of the venus flytrap to capture insects is due to
Three of the following statements regarding cell organelles are correct while one is wrong. Which one is wrong?
Choose the correct statement.
Water potential is determined by
Process of water coming out from specific holes in margins is:
Root pressure is maximum when
Water potential of any solution is
The first step in photosynthesis is
Stomatal opening in plants occurs due to influx of
The net gain of ATP from complete oxidation of 1 molecule of glucose in eukaryote is
Ethylene is related with
Brunner's glands are present in
Curdling of milk in small intestine takes place due to
If due to some injury, the chordae tendinae of the tricuspid valve of the human heart is partially non-functional, what will be the immediate effect?
Haversian canal in the bone of mammals is connected by small blood vessel canal called
The posterior part of the retina which is just opposite to the lens is called
The scientist who described the birds as glorified reptiles was
Assertion: Severe Acute Respiratory Syndrome (SARS) originated in China.
Reason: China is the most populated country of the world.
Assertion: Outermost layer of the bone is a fibrous connective tissue.
Reason: Matrix of bone is composed of protein Ossein.
Assertion: DNA fingerprinting involves identifying differences in some specific regions in DNA sequence.
Reason: In repetitive DNA sequences, a small stretch of DNA is repeated many times.
Assertion: Phylloclades are adaptation for xerophytic habitats.
Reason: Ruscus and Casuarina have reduced or modified leaves to avoid transpiration.
Assertion: There is no chance of transmission of malaria to a man on the bite of a male Anopheles mosquito.
Reason: It carries a non virulent strain of Plasmodium.
Assertion: In collateral vascular bundles, phloem is situated towards inner side.
Reason: In monocot stem, cambium is present.
Assertion: Use of fertilisers greatly enhances crop productivity.
Reason: Irrigation is very important for increasing crop productivity.
Assertion: Recognition site should be preferably single and responsive to commonly used restriction enzyme.
Reason: In pBR322, alien DNA is ligated generally in the area of BamHI which is a site of tetracycline resistant gene.
Assertion: Monotropa grows in pine forests with the roots of pines.
Reason: Saprophytes obtain their nutrition from dead organic matter.
Assertion: The concentration of methane in the atmosphere has more than doubled in the last 250 years.
Reason: Wetlands and rice fields are the major sources of methane.
Assertion: Use of condom is a safeguard against AIDS and other sexual diseases, besides checking pregnancy.
Reason: Certain contraceptives are inserted under the skin of the upper arm to prevent pregnancy.
Assertion: TMV is a rod-shaped virus.
Reason: It is made up of protein coat and RNA.
Assertion: Bats and whales are classified as mammals.
Reason: Bats and whales have four chambered heart.
Assertion: A cell membrane shows fluid behaviour.
Reason: A membrane is a mosaic or composite of diverse lipids and proteins.
Assertion: Tapeworm, Roundworm and Pinworm are endoparasites of human intestine.
Reason: Improperly cooked food is the source of intestinal infections.
Assertion: Cyclic pathway of photosynthesis first appeared in some eubacterial species.
Reason: Oxygen started accumulating in the atmosphere after the non-cyclic pathway of photosynthesis evolved.
Assertion: Glycolysis begins in cytoplasm and yields two molecules of pyruvate.
Reason: During glycolysis, four ATP molecules are produced and net yield is two ATP molecules.
Assertion: Persons suffering from haemophilia fail to produce blood clotting factor-VIII.
Reason: Prothrombin producing platelets in such persons are found in very low concentration.
Assertion: Under conditions of high light intensity and limited CO2 supply, photorespiration has a useful role in protecting the plants from photooxidative damage.
Reason: If enough CO2 is not available to utilise light energy for carboxylation to proceed, the excess energy may not cause damage to plants.
Assertion: Our body secretes adrenaline in intense cold.
Reason: Adrenaline raises metabolic rate.
The contribution of Sarkaria Commission was related between
Where is ‘Indira Gandhi Rashtriya Uran Akadami’ situated?
How many languages feature on the language panel of contemporary Reserve Bank of India currency notes?
The most appropriate measure of a country’s economic growth is its
Mixed economy means
'Saraswati Samman' is given annually for outstanding contribution to
Which river is called ‘Bengal’s sorrow’?
The North-South and East-West corridors of the National Highway Development Project meet at
X-rays were discovered by
Since the Britishers wanted India to produce and supply raw materials to feed English factories, they pushed a policy that encouraged cultivation of
Tong : Blacksmith : : Wrench : ?
6 : 42 : : 5 : ?
Choose the letter that will come in place of the question mark (?) in the following series.
B, Z, C, Y, D, X, E, ?
Find the odd number out from the given alternatives.
Pick the odd one out.
In a certain code language, 'tink log se' means 'fruits are ripe', 'se thao hay tink' means 'mangoes are not ripe', and 'hay se cue tink' means 'bananas are not ripe'. Which among the following words in that code language means 'bananas'?
In a certain code language, '3a, 2b, 7c' means 'Truth is eternal'; '7c, 9a, 8b, 3a' means `Enmity is not eternal`; and '9a, 4d, 2b, 9b' means 'Truth does not perish'. Which of the following means 'Enmity' in that language?
Shyam walked 6 m towards east, then took a right turn and walked 9 m. He then took a left turn and walked 6 m. How far is he from the starting point?
How many such pairs of digits are there in the number 95137248, each of which has as many digits between them in the number as when they are arranged in ascending order?
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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 
. The wavelength of Kα line of zinc (atomic number = 30) will be
where P and Q are the inputs of the logic circuit, represents
are the same as that of the
) is 0.5, the angle of rope with the surface is 60° and g = 9.8 m/s2, then the work done is
and The resultant amplitude is
and then, its potential energy is –
, the reduced pressure , and the reduced volume 
. The reduced equation of the state may be given as
, the ionic radius of Cl- ion is 1.82 
gives red colour in Lassaigne’s test.
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