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A perfect gas at 27°C is heated at constant pressure so as to double its volume. The final temperature of the gas will be, close to
A continuous flow water heater (geyser) has an electrical power rating = 2 kW and efficiently of conversion of electrical power into heat = 80%. If water is flowing through the device at the rate of 100 cc/sec, and the inlet temperature is 10 °C, the outlet temperature will be
A piece of hot copper at 100°C is plunged into a pond at 30°C. The copper cools down to 30°C, while the pong, being huge, stays at its initial temperature. Then
A perfect gas of a given mass is heated first in a small vessel and then in a large vessel, such that their volumes remain unchanged. The P-T curves are
A vessel with open mouth contains air at 60°C. When the vessel is heated up to temperature T, one fourth of the air goes out. The value of T is
The refractive index of the gel must be
The figure shows two converging lenses of focal length 10 cm and 20 cm respectively. Incident rays are parallel to the principal axis. What should be the value of d so that final rays are also parallel?
A slit of width a is illuminated by white light. For red light (λ = 6200), the first minima is obtained at a diffraction angle of 30°, Then the value of a is
The diameter of the objective lens of microscope makes an angle β at the focus of the microscope. Further, the medium between the object and the lens is an oil of refractive index n. Then the resolving power of the microscope.
For which of the following particles will it be most difficult to experimentally verify the de-Broglie relationship?
If the frequency of light in a photoelectric experiment is doubled, the stopping potential will -
The work function of sodium is 2.3 eV. The threshold wavelength of sodium will be
The de-Broglie wavelength of the electron in the ground state of the hydrogen atom is (radius of the first orbit of hydrogen atom = 0.53 Å).
atom disintegrates to with a half of life of 4.5x109 years by emitting six alpha particles and n electrons. Here is n
The part of a transistor which is most heavily doped to produce large number of majority carriers is:
In a common emitter configuration with suitable bias, it is given that RL is the load resistance and RBE is small signal dynamic resistance (input side). Then, voltage gain, current gain and power gain are given, respectively, by : β is current gain, IB, IC and IE are respectively base, collector and emitter currents.
A ring is suspended from a thin insulating rod. Another coaxial ring (1) of different material but same size carrying current I=1.5 A starts moving towards the suspended ring (2). The ring (2) will
An aircraft with a wingspan of 40 m flies with a speed of 1080 km/hr in the eastward direction at a constant altitude in the northern hemisphere, where the vertical component of the earth’s magnetic field 1.75×10-5 T. Then the emf developed between the tips of the wings is
Which of these reasons are correct?
The resistance of a wire is R. It is bent at the middle by 180o and both the ends are twisted together to make a shorter wire. The resistance of the new wire is
The tuned collector oscillator circuit used in the local oscillator of a radio receiver makes use of an LC tuned circuit with
. What will be the frequency of oscillations?
An imaginary, closed spherical surface S of radius R is centered on the origin. A positive charge +q is originally at the origin and electric flux through the surface is ♁E. Three additional charges are now added along the x axis -3q at at and 4q at
The flux through S is now
Two small balls of same mass having equal charge q are suspended by two insulating threads of equal length L from a hook in an elevator. The elevator is falling freely. The tension in the string at equilibrium with respect to frame attach with elevator will be
The given network, the value of C, so that an equivalent capacitance between A and B is 3 µF, is
The figure shows a charge q placed inside a cavity in an uncharged conductor. Now if an external electric field is switched on-(C is the centre of Sphere)
Currents of a 10 ampere and 2 amperes are passed through two parallel thin wires A and B respectively in opposite directions. Wire A is infinitely long and the length of the wire B is 2m. The force acting on the conductor B, which is situated at 10 cm distance from A will be
Magnetic susceptibility of diamagnetic materials is of the order of (SI units)
A magnetic field exists at a point. If a test charge moving with velocity experiences no force at a certain point, the electric field at that point in SI unit is
A charged particle is released from rest in a region of steady and uniform electric and magnetic field which are parallel to each other. The particle will move in a -
A circular disc rolls down an inclined plane. The ratio of the rotational kinetic energy to the total kinetic energy is
A planet of mass m is moving around a star of mass M and radius r. The star abruptly shrinks to half its radius without any loss of mass. What change will be there in the orbit of the planet?
If the body is projected with a speed lesser than escape velocity, then
Two bodies of mass m and 2m are at d distance apart. They rotate about their common center of mass. What is the ratio of angular momentum of smaller mass to the heavier body?
Determine the angle between vectors and is
Acceleration – time graph of a body is shown below.
The correspond velocity-time graph of the same body is
A girl holds a book of mass m against a vertical wall with a horizontal force F using her finger so that the book does not move, the frictional force on the book by the wall is
The road at a circular turn of radius 20 m is banked by an angle 30o. What should be the speed of the vehicle on the turn so that the normal contact force is able to provide the necessary centripetal force?
A cylindrical vessel field with kerosene oil of density 11kg/m3.The height and the radius of the cylinder are 8m and 2m respectively. Then find the thrust per unit area at point M 4 m above from the ground.
The displacement y(t) = A sin (ωt + ϕ) of a pendulum for is correctly represented by
If x = at + bt2 where x is in metre (m) and t is in hour (hr) then unit of b will be
A resistor of 6 kΩ with tolerance 10% and another resistance of 4 kΩ with tolerance 10% are connected in series. The tolerance of the combination is about
In a metallic triangular sheet ABC, AB = BC = l. If M is mass of sheet, what is the moment of inertia about AC?
A person standing between two horns at a distance apart sounding with same frequency. When that persons runs towards one horn then he hears …….
A particle moves in a straight line with retardation proportional to its displacement. Its loss of kinetic energy for any displacement x is proportional to
A body of mass m is accelerated uniformly from rest to speed v in total time T. The Instantaneous power delivered to the body as a function of time(t) is given by
What volume of 0.1 M ethanol is required for the preparation of 5.6 g of C2H4 using concentrated H2SO4?
How many unit cells are present in a cube shaped ideal crystal of NaCl of mass 1g?
Distribution law was given by
What is the time (in sec) required for depositing all the silver present in 125 mL of 1 M AgNO3 solution by passing a current of 241.25 A?
(1F = 96500 coulombs)
Ostwald’s dilution law is applicable to
The concentration of a reactant X decreases from 0.1 M to 0.005 M in 40 minutes. If the reaction follows first order kinetics, then the rate of the reaction, when the concentration of X is 0.01 M, will be
The temperature dependence of rate constant (k) of a chemical reaction is written in the terms of Arrhenius equation .
Activation energy (Ea) of the reaction can be calculated by plotting
An endothermic reaction with high activation energy for the forward reaction is given by which of the following diagrams?
The equation for Freundlich adsorption isotherm is
In an experiment, addition of 4.0 mL of 0.005 M BaCl2 to 16.0 mL of arsenious sulphide solution just causes complete coagulation in 2 hours. The flocculating value of the effective ion is
The metal which cannot be extracted by smelting process is
What is the correct statement for the acids of phosphorus H3PO2, H3PO3 and H3PO4?
The equivalent weight of H3PO2, when it disproportionates into PH3 and H3PO3, is
German silver is an alloy of
The basic character of the transition metal monoxide follows
If 0.1 M of a weak acid is taken and its percentage of degree of ionisation is 1.34%, then its ionisation constant will be
Considering H2O as a weak field ligand, the number of unpaired electrons in [Mn(H2O)6]2+ will be (Atomic number of Mn = 25)
The above reaction is known as
Acid hydrolysis of which of the following compounds yields two different organic compounds?
When ketones react with Mg - Hg over water, it gives
Which one of the following reactions is called Rosenmund reaction?
Among the following, the weakest base is
The compound which gives an oily nitrosamine on reaction with nitrous acid at low temperature, is
The amino acid which is not optically active is
The number of moles of oxygen obtained by the electrolytic decomposition of 108 g water is
One mole of methanol, when burnt in O2, gives out 723 kJ mol-1 heat. If one mole of O2 is used, then what will be the amount of heat evolved?
The de-Broglie wavelength associated with a ball of mass 1 kg, having kinetic energy 0.5 J, is
The wavelength of a spectral line emitted by hydrogen atom in the Lyman series is cm. What is the value of n2?
(R = Rydberg constant)
An element having atomic number 56 belongs to
The correct order of magnitude of bond angle among the compounds CH4, NH3 and H2O is
Which of the following are arranged in the decreasing order of dipole moment?
If 10–4 dm3 of water is introduced into a 1.0 dm3 flask at 300 K, then how many moles of water are in the vapour phase when the equilibrium is established?
(Given: Vapour pressure of H2O at 300 K is 3170 Pa and R = 8.314 J K–1 mol–1)
Absolute zero temperature is the temperature at which
The first law of thermodynamics is represented by the equation
On adding 0.1 M solution of [Ag+], [Ba2+] and [Ca2+] (each) in a Na2SO4 solution, compound that will be precipitated first is
[Ksp BaSO4 = 10-11, Ksp CaSO4 = 10-6 and Ksp Ag2SO4 = 10-5]
In a basic buffer, 0.0025 moles of NH4Cl and 0.15 moles of NH4OH are present. The pH of the solution having pKb value of 4.74 will be
At 80oC, [H3O+] of distilled water is 10-6 mol/L. At the same temperature, the value of Kw is
The conductivity of 0.001028 mol L–1 acetic acid is 4.95 × 10–5 Scm–1. Find out its dissociation constant, if Λom for acetic acid is 390.5 Scm–1 mol–1.
In which of the following reactions hydrogen is not acting as a reducing agent?
Which of the following is paramagnetic?
Which of the following is/are C8H16 that can form cis-trans geometrical isomers and has/have a chiral centre?
The IUPAC name of the following compound is
Find the compound X in the reaction.
Which of the following substrates can be converted into CH4 and CH3–CH3 in a single step using different reactions?
What is ‘X’ in the following sequence?
Multicellular animals, which show active streamlined and directional movements through their environments, are characterised by the presence of
Taxonomy is the process of classification of living forms based on
The taxonomic unit `Phylum` in the classification of animals is replaced by which hierarchical level in the classification of plants?
Which of the following algal species contain phycoerythrin as major pigment?
Which of the following structures are used for survival in therophytes during adverse season?
The fruiting body of Aspergillus or Penicillium is
Epipetalous stamens with free filaments and fused anthers occur in
The scutellum of grass embryo is a/an
Juicy hair-like structures observed in lemon fruit develop from
Rod-like or columnar cells in the seed coats of many leguminous plants are called
What is common between chloroplasts, chromoplasts and leucoplasts?
The telomeres of eukaryotic chromosomes consist of short sequences of
Which of the following cellular structures has a porous membrane?
Carbohydrates, the most abundant biomolecules on Earth, are produced by
Which of the following is the simplest amino acid?
The catalytic efficiencies of two different enzymes can be compared by the
Which stage does the cell enter after the completion of synapsis all along the chromosome?
Which of the following precedes reformation of the nuclear envelope during M phase of the cell cycle?
What is the number and appearance of chromosomes in the nucleus of a eukaryotic cell called?
The most abundant element present in plants is
Where are photosynthates produced?
Grey spots of oat are caused due to the deficiency of
Which of the following is not a beneficial element required by higher plants?
Why is photosynthesis in C4 plants relatively less limited by atmospheric CO2 level?
One plant was grown at 12 hours day and 12 hours night period cycles and it flowered, while another plant at night phase was interrupted by flash of light and it did not produce flowers. Under which of the following categories will you place this plant?
Which of the following equations correctly describes photophosphorylation?
Why is the value of RQ infinity in case of anaerobic respiration?
What is the phenomenon of vernalisation concerned with?
Which of the following is not a property of monocotyledonous stem?
Which plant growth hormone is named after a fungus that causes a disease called bakanae in rice?
The development of embryo from the cells of nucleus is called
In which of the following sets of members of kingdom Plantae are the flagellated male gametes present?
Which of the following is a characteristic of nucellar embryo?
Brassica is resistant to which of the following diseases?
The major source of liquid hydrocarbon is
In mung bean, resistance to yellow mosaic virus and powdery mildew was induced by
Nucleotides are building blocks of nucleic acids. Each nucleotide is a composite molecule formed by
Which of the following is an example of shuttle vectors?
Somaclonal variation is seen in
Bagging is done to
Which of the following types of algae and fungi are most commonly found to be associated with lichens?
Which of the following is a matching pair of certain organisms and their interaction?
The rate at which light energy is converted into chemical energy of organic molecules is the ecosystem's
Biosphere reserves differ from national parks and wildlife sanctuaries because in the former,
Vincristine and vinblastine are obtained from
In mammals, Brunner’s glands are present in submucosa coat of
In which of the following ducts is sialolithiasis most common?
In which area do lungs expand during forced inspiration?
Which of the following lung diseases affects the pleura?
Which hormone prepares the uterus for the implantation of fertilised ovum?
____ area of cerebrum is responsible for the sensations of pain, touch and temperature.
____ lobe plays role in variety of homeostatic functions.
Which type of nerve endings in the skin is/are responsible for sensitivity to light touch?
O blood can be donated to persons with which of the following types of blood groups?
Which of the following events of cardiac cycle marks the end of the T-wave?
Which of the following does not characterise the circulation of blood by human heart?
During muscle contraction, which of the following neurotransmitters generates an action potential in the sarcolemma when a neural signal reaches the neuromuscular junction?
Which of the following cells in a multicellular organism move(s) through the tissues by amoeboid movements to reach the places of infection?
Which of the following statements regarding muscle fatigue is false?
What name is given to the process of passing out urine from the body?
Where does ultrafiltration take place in kidney during the formation of urine?
Animals having coelom are called coelomates. Which of the following animals are not coelomates?
Match the following:
Crocodile and Penguin are similar to whale and Dog fish in which one of the following characters
The animals of which of the following classes have oil glands present at the base of the tail?
A limbless amphibian is
Comb plates of ctenophores possess
In which organism does pulmocutaneous circulation exist?
Which of the following is not a characteristic of I band of striated muscles?
Which of the following is not a type of connective tissue proper?
Which of the following types of protein is not found in connective tissues?
Which of the following sentences about epithelial tissue is false?
Pseudostratified columnar with stereocilia cells is found in the
Which of the following characterises development, starting with the head and brain areas and moving downwards?
During the 5th prenatal month, expecting females frequently start feeling the spontaneous movements of the foetus in the abdominal region. These movements are known as
In mammals, the penis is a reproductive, intromittent organ that additionally serves as the urinal duct. Which of the following in a human male is the visible ridge between the lateral halves of the penis?
Which of the following parts of the decidua serves as the outer layer of the foetal placenta?
Centromere proteins are a group of proteins which either form or mediate the function of centromeres. Name the centromere protein predominately essential for keeping proper kinetochore size.
In a cell, which of the following gene expressions is susceptible to environmental change?
The mutations forming nonsense codon in the transcribed mRNA are
Identify the genetic codes marked A and B in the diagram.
Which of the following represents the correct order of enzymes participating in DNA replication?
The origin sequences of DNA replication are rich in
Which of the following methods is used to reduce pollutants of particulate nature?
Which of the following is an expensive method that converts unburnt hydrocarbons into CO2 and water?
Which of the following does not describe the importance of phosphorus?
Which of the following is the causal agent of cerebral tertian malaria?
Which of the following is also known as juvenile diabetes?
Confirmatory test for typhoid is
What is the type of immunoglobulin produced against allergens?
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), the first minima is obtained at a diffraction angle of 30°, Then the value of a is
atom disintegrates to 
with a half of life of 4.5x109 years by emitting six alpha particles and n electrons. Here is n
at 
and 4q at 
exists at a point. If a test charge moving with velocity 
experiences no force at a certain point, the electric field at that point in SI unit is
and 
is
is correctly represented by
.
cm. What is the value of n2?
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