For high frequency, a capacitor offers
The de-Broglie wavelength of a particle moving with a velocity 2.25 x 108 ms-1 is equal to the wavelength of a photon. The ratio of kinetic energy of the particle to the energy of the photon is [ velocity of light = 3 x 108 ms-1 ]
From Compton effect
λ = h p = c v [From de-Broglie wavelength]
c p = h v
What is self inductance of a which produces 5 V, when current in it changes from 3 A to 2 A in one millisecond ?
A 5.0 μ F capacitor is charged to a potential difference of 800 V and discharged through a conductor. The energy given to the conductor during the discharge is
A man is sitting on a rotating table with his arms stretched outwards. When he suddenly folds his arms inside, then his
Every atom makes one free electron in copper. If 1.1 ampere current is flowing in the wire of copper having 1 mm diameter, then the drift velocity (approx.) will be (Density of copper = 9 x 103 kg m-1 and atomic weight = 63)
The colour sequenece in a carbon resistor is red, brown, orange and silver. The resistance of the resistor
The current flowing in a step down transformer 220 V to 22 V having impedance 220 Ω is
The fact that radiosignals reach the earth from outside the atmosphere, was discovered accidently by
A thin spherical conducting shell of radius R has charge q. Another charge Q is placed at the centre of the shell. The electrostatic potential at a point P at a distance R/2 from the centre of the shell is
Two thin wire rings each having a radius R are placed at a distance d apart with their axes coinciding. The charges on the two rings are +q and -q. The potential difference between the centres of the two rings is
If a ladder weighing 250 N is placed against a smooth vertical wall having coefficient of friction between it and floor is 0.3, then what is the maximum force of friction available at the point of contact between the ladder and the floor
If a person moves from the pole to the equator, the value of his weight will
A monochromatic beam of light is used for the formation of fringes on the screen by illuminating two slits in the Young's double-slit interference experiment. When a thin film of mica is interposed in the path of one of the interfering beams, then
Interposing mica does not affect the fringe width but shifts the fringe pattern
A geostationary satellite
Heat is flowing through two circular rods of the same material. The diameters of the rods are in the ratio of 1:2 and their lengths in the ratio of 2:1. If the temperature difference between the ends of the two rods is same, then ratio of the rates of flow of heat through them, will be
The root mean square velocity of the gas molecules is ν at pressure P. If the pressure increase by two times, then the root mean square velocity will become
rms velocity does not depend on pressure.
A circular disc of radius 0.2 meter is placed in a uniform magnetic field of induction (1/π) (Wb/m2 ) in such a way that its axis makes an angle of 60o with B→ . The magnetic flux linked with the disc is
The range of voltmeter of resistance 300Ω is 5V. The resistance to be connected to convert it is an ammeter of range 5A is
The gyromagnetic ratio of an electron of charge e and mass m is equal to
Which of the following is an example for diamagnetic substances?
The null points are on the axial line of a bar magnet, when it is placed such that its south pole points
A magnet of length 10cm and magnetic moment 1 Am2 is placed along the side AB of an equilateral triangle ABC. If the length of the side AB is 10cm, the magnetic induction at the point 'C' is ( μ0 = 4 π x 10-7 Hm-1 )
The excess pressure inside one soap bubble is three times that of a second bubble. The ratio of the volumes of the first bubble to that of second bubble is
A solid of density ρ₁ is floating in a liquid of density ρ₂. If ν is the volume of solid submerged in the liquid and V is the total volume of the solid, the ν/V is equal to
A metallic wire is suspended by attaching some weight to it. If α is the longitudinal strain and Y is Young's modulus, then the ratio between elastic potential energy and the energy density is equal to
The distance between two particles is decreasing at the rate of 6 m/sec. If these particles travel with same speeds and in the same direction, then the separation increase at the rate of 4 m/sec. The particles have speeds as
A spherical shell has mass M and radius R. Moment of inertia about its diameter will be
A weightless ladder 20 ft long rests against a frictionless wall at an angle of 60o from the horizontal. A 150 pound man is 4 ft from the top of the ladder. A horizontal force is needed to prevent it form slipping. Choose the correct magnitude from the following
The half life period of radio - active isotope is 5 minutes. The fraction of isotope, that will be remaining after 30 minutes is
In a camera, the time of exposure for good quality prints depends upon
The period of simple pendulum is doubled, when
Light of wavelength λ and photon energy 2 eV falling on a metal surface produces photoelectrons of maximum velocity ν. If λ is decreased by 25% and the maximum velocity is doubled, the work function of metal (in eV) is
The slope of frequency of incident light and stopping potential for a given surface will be
When a body is thrown with a velocity u making an angle θ with the horizontal plane, the maximum distance covered by it in horizontal direction is
An equiconvex lens of glass of focal length 0.1 m is cut along a plane ⊥ er to principal axis into two equal parts. The ratio of focal length of new lenses formed is
A ray of light is incident on one of the refracting faces of an equilateral prism, at an angle of incidence 48o , in the minimum deviation position. The angle of deviation produced by the prism is
In Ramsden's eye-piece, the distance from the eye lens at which the image due to objective of focal length f is formed is
A person cannot see objects clearly beyond 2.0 m. The power of lens required to correct his vision will be
The moment of inertia, of a rigid body, depends upon
A second's pendulum is placed in a space laboratory orbiting around the earth at a height 3R, where R is the radius of the earth. The time period of the pendulum is
Here effective acceleration geff = 0
So T= Infinite
In a junction diode, the holes are due to
A body of mass 5 gm is executing S.H.M. about a point with amplitude 10 cm. Its maximum velocity is 100 cm/sec. Its velocity will be 50 cm/sec at a distance
An open pipe of length 'l' vibrates in fundamental mode. The pressure variation is maximum at
The excess of pressure inside a soap bubble than that of the outer pressure is
Two resistances R₁ and R₂ when connected in series and parallel with 120 V line, power consumed will be 25 W and 100 W respectively. Then the ratio of power consumed by R₁ to that consumed by R₂ will be
A cell of constant electromotive force (E) produces an equal amount of heat during the same time in two independent resistances R₁ and R₂, when connected separately one after the other across the cell. The internal resistance (r) of the cell is
Which of the following does not make use of chemical effect of current?
The graph between temp in oC and pressure of a perfect gas is
A given mass of an ideal gas is at pressure P and absolute temp T. The isothermal bulk modulus of the gas is
The internal energy U is unique function of any state, because change in U
The dimensional formula for inductance is
Dimensions of resistance in an electrical circuit, in terms of dimension of mass M, of length L, of time T and of current I, would be
If a star is moving towards the earth, then the spectrum lines are shifted towards
According to wave theory, light is a form of energy which travels through a medium in the form of
The speed of transverse vibrations in a stretched string is 700 cm/s. If the string is 2 m long, the frequency with which it resonates in fundamental mode is
Beats are produced when the two vibrating tuning forks have
A ball is dropped from a height 10 m. Ball is embedded in sand 1 m and stops, then
The reaction conditions used for converting 1,2-dibromo ethane to ethylene are
C-Cl bond chlorobenzene in comparison to C-Cl bond of methyl chloride is
In its reaction with silver nitrate acetylene shows
When HNO₃ is dropped into the palm and washed with water, it turns yellow. It shows the presence of
A metal surface is exposed to solar radiations
If the radius of first Bohr orbit be a₀, then the radius of the third orbit of hydrogen would be
The quantum number +1/2 and -1/2 for the electron spin represent
which of the following hybridisation occurs in the formation of methane molecule?
In which of the following molecules all the bonds are not equal?
Which of the following is isoelectronic as well as isostructural with N₂O?
The heat of formation of the compound in the following reaction is
H₂(g) + Cl(g)→ 2HCl(g)+44 Kcal
The equilibrium constant for the following reaction will be 3 A + 2 B → C
The rate at which a substance reacts depends on its
A system is said to be in thermodynamic equilibrium when it is in
The densities of graphite and diamond at 298 K are 2.25 and 3.31 g-cm-3 respectively. If the standard free energy difference (ΔGo)is equal to 1895 J-mol-1, then pressure at which graphite will be transformed into diamond at 298 K is
IUPAC name of CCl₃CH₂CHO is
2-Acetoxybenzoic acid is called
Which of the following are isoelectronic species?
are isoelectric species
(i) Number of electrons in
7+2 x (1) + 1 =10
(ii) Number of electrons in
7+4 x (1) - 1 = 10
(iii) Number of electrons in NH3
7+3 x(1) = 10
(iv) Number of electrons in CH3
6+3 x (1) = 9
According to IUPAC nomenclature sodium nitroprusside is named as
The charge required to liberate 11.5 g sodium from fused sodium chloride is
Oxygen and cyclopropane at partial pressure of 570 torr and 170 torr respectively are mixed in a gas cylinder. What is the ratio of the number of moles of cyclopropane to the number of moles of oxygen ?
The most abundant metal on the surface of the earth is
3.2 oxygen is diffused in 10 minutes. In similar conditions, 2.8 g nitrogen will diffuse in
The variety of glass used in making lenses and prisms is
A group 16 element exists in monoatomic state in the metallic lattices. It also exists in two crystalline forms. The metal is
Aluminium chloride is a/an
Compared with the alkaline earth metals, the alkali metals exhibit
Composition of glass is
When lightning flash is produced through air, the gas formed is
Aluminium chloride is
The correct formula of Plaster of Paris is
Chlorine cannot displace
Which of the following statements is correct ?
What is the conjugate base of OH⁻?
0.1 M solution of which of the substance will behave basic?
CH₃CH₂CH₂OH and CH₃CH₂OCH₃ are
Acetic acid on heating in presence of P₂O₅ gives
The projectile, which experiences minimum repulsion on approaching a particular nucleus, is
The half life period of a radioactive element is 90 minutes. What percentage of radioactive element will be present after 6 hours of decomposition?
Which of the following compounds will evolve hydrogen on treatment with Na metal?
Which of the following alkyl halides is used as a methylating agent?
If acetyl chloride is reduced in the presence of BaSO₄ and Pd, then
following step is :
CH3CH3 + Cl- → CH3CH2 + HCl
What is formed when a primary alcohol undergoes catalytic dehydrogenation?
Which one of the following octahedral complexes will not show geometrical isomerism? (A and B are monodentate ligands)
MA3 B3 - 2 geometrical isomers
MA2 B4 - 2 geometrical isomers
MA4 B2 - 2 geometrical isomers
The complexes of general formula Ma6 and Ma5b octahedral geometry do not show geometrical isomerism
Conc. HNO3 forms NO2+ in presence of :
Reimer-Tiemann reaction involves
The catalyst used in the manufacture of polythene by Zeigler method is
Oxidation number of S in S₂O₃2- is
Which one of the following is not used for the purification of solid impurities?
Due to Frenkel defect, the density of ionic solids
Very dilute solutions which show deviations (positive or negative) from Raoult's law are called
At a particular temperature, the vapour pressure of two liquids A and B are respectively 120 and 180 mm of mercury. If 2 moles of A and 3 moles of B are mixed to from an ideal solution, the vapour pressure of the solution at the same temperature will be
Smoke is an example of
Which of the following properties are not correct for enantiomers?
A reduction in atomic size with increase in atomic number is a characteristic of elements of
0.078 gram of hydrocarbon occupy 22.4 ml volume at STP. The empirical formula of the hydrocarbon is CH. The molecular formula of the hydrocarbon is
A useful member of lanthanides is
A bivalent consists of
What is true ?
Which of the following animals have scattered cells with cell-tissue grade of organisation?
What is common among scorpion ,crab ,honeybee and silverfish?
Which blood cell can be described as being a biconcave disc?
Which of these can dissolve a blood clot?
Green colour of bile is due to
Flax fibers belong to
The pancreas secretes enzymes that enter the small intestine and chemically digest chyme. Choose the enzyme(s) that break(s) down fats.
The product of hybridization is known as
Saffron is obtained from
Influence of soil on plant behaviour is known as
Lint and fuzz are characteristics of the fibres of
Which of the following animal is the most economical 'Meat making machine'?
'Sella turcica' is a depression in
The 10% energy transfer law of food chain was given by
Which of the following represents an organism and its ecological niche?
Each species of a community lives in a very specific part of a habitat and perform certain functions. The habitat together with the functions of a species is called ecological niche of the species. Plant lice (aphids) which suck plant sap from the leaves represent the ecological niche of the species
Sickle-cell anaemia is a genetic disorder. The cause of the disease is due to :
(i)The substitution of glutamic acid in place of aspartic acid.
(ii)The substitution of proline in place of methionine.
(iii) Substitution of valine in place of glutamic acid.
Select the correct answer using the codes given below :
Which is connected with multiple phenotypes?
Environmental agent triggering transcription from an operon is
Hypophysectomy results in
Fern character in cycas is
The plants with sets of similar chromosomes are termed as
During which disorder the blood clotting is delayed?
Receptors of pressure present in deep layers of skin are
Argentaffin may arise in
The defective condition of accomodation of the eye in which distant objects are clearly seen but near object are indistinct is
Inflammation of a lymph node is called _____.
Animals/organisms floating on the surface of water are
Minerals absorbed by roots move to the leaf through
Sonar system is found in
Which of these nodes cannot be directly palpated?
Cuttlefish is a :
Chemosynthesis and photosynthesis are similar in being
Which of the following is a renewable source of energy?
Carbon dioxide is formed in all the following except
Karyotaxonomy is the branch of taxonomy, which is based on
In which one of the following pathogens do the cells of promycelium after the germination of teleutospore produce infection hyphae instead of basidiospores?
Food can be preserved by
Which one of the following substances plays an important role in biochemical defence of host plants?
Escherichia coli is used as an indicator organism to determine pollution of water with
Ultimate environmental hazard to mankind is due to
Which of the following fungus is used in baking of bread?
Extra-embryonic membranes of the mammalian embryo are derived from
Venus Flower Basket belongs to Phylum
Pollen tube deposits its inclusions in
NADH of glycolysis reacts with an inorganic element during liberation of energy. The respiration is
Enzyme helping in oxidative decarboxylation of pyruvic acid is
The extensive capillary network which surrounds each alveolus
Which of the following is caused by the contraction of the diaphragm?
Potato is (underground) stem because it
Which of the following is not an exchange process ?
Dorsal vessel of Earthworm is
Which of the following family plants having tricarpellary, syncarpous unicellular gynoecium with inferior ovary -
The main function of clitellum is
Blood entering the kidney is filtered by th