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What is the magnitude of a point charge due to which the electric field 30 cm away has the magnitude 2N/C?
In the given figure, the charge on the 1.5 μF capacitor is
If potential difference across a capacitor is changed from 15 V to 30 V, the work done is W. If potential difference is changed from 30 V to 60 V, the work done will be
The equivalent capacitance in the given system of capacitance will be
Air is expended from 50 litres to 150 litres at 2 atmosphere. The external work done is
(1 atmospheric pressure = 1 x 105 N/m2)
At a given temperature, the pressure of an ideal gas of density ρ is proportional to
The equation of travelling wave is y = 60 cos (1800t – 6x), where y is in micron and t in second and x in metre. The ratio of maximum particle velocity to velocity of wave propagation is
Standing waves are produced in a 10 m long stretched string. If the string vibrates in 5 segments and the wave velocity is 20 m/s, the frequency is
You are provided with three bulbs of 25, 40 and 60 watt. Which of them has the lowest resistance?
Two equal and opposite charges of 2 × 10-10 C are placed at a distance of 1 cm forming a dipole and are placed in an electric field of 2 × 105 N/C. The maximum torque on dipole is
This question consists of two statements each, Assertion and Reason. While answering these questions, you are required to choose any one of the following five responses.
Assertion: Faraday's laws are consequences of conservation of energy. Reason: In a purely resistive AC circuit, the current lags behind the emf in phase.
A ray of light enters from a rarer medium to a denser medium at an angle of incidence where the reflected and refracted rays make an angle of 90° with each other. The angles of reflection and refraction are r and r', respectively. The critical angle of the denser medium is
A beam of light consisting of red, green and blue colours is incident on a right angled prism as shown in figure. The refractive indices of the material of prism for red, green and blue colours, respectively are 1.33, 1.44 and 1.47. The prism will
Two plane mirrors are inclined to each other. A ray of light incident on one face at 30°, after reflection from the second, retraces the path.
What is the angle between the mirrors?
Two plane mirrors are inclined to each other. A ray of light incident on one face at 30°, after reflection from the second, retraces the path. What is the angle between the mirrors?
Assertion: Endoscopy involves use of optical fibres to study internal organs.
Reason: Optical fibres are based on phenomenon of total internal reflection.
A plano-convex lens has refractive index 1.6 and its radius of curvature is 60 cm. What is the focal length of the lens?
S is a source from which the intensity of light received at Q is P. The intensity of light received at Q1 as shown in figure is
Intensity at any point due to interference of two waves will be maximum when path difference at that point is
Assertion: The energy (E) and momentum (p) of a photon are related by p = E/c. Reason: The photon behaves like a particle.
A proton and α-particle have the same kinetic energy. The ratio of their linear momentum is
The wave number of the energy emitted when electrons come from fourth orbit to second orbit in hydrogen is 20,397 cm–1. The wave number of energy for the same transition in He+ is
A nuclear reactor delivers power of 10 W. Find the fuel consumed by the reactor per hour if its efficiency is 20%. (Given c = 3 × 108 m/s)
A nuclear reactor delivers power of 10 W. Find the fuel consumed by the reactor per hour if its efficiency is 20%.
(Given c = 3 × 108 m/s)
A transmitting station transmits radio-waves of wavelength 360 m. Calculate the inductance of coil required if a condenser of capacity 1.20 μF is the resonant circuit to receive them.
Assertion: The Coulomb force is the dominating force in the universe. Reason: The Coulomb force is weaker than the gravitational force.
A voltmeter connected across the terminals of a cell measures 5 V and an ammeter connected measures 10 A. If a resistance of 2 Ω is connected across the terminal of the cell, the current flowing through this resistance is
In the energy band diagram of a material shown below, the open circles and filled circles denote holes and electrons, respectively. The material is a/an
The dominant mechanisms for motion of charge carriers in forward and reverse biased silicon p-n junctions are
A wheel rotates with constant angular acceleration of 2.0 radian/sec2. If the wheel starts from rest, the number of revolutions it makes in the first ten second will be approximately
A motor cycle is going on an overbridge of radius R. The driver maintains a constant speed. As the motor cycle is ascending on the overbridge, the normal force on it
If we throw a body upwards with velocity of 4 m/s, at what height does its kinetic energy reduce to half of the initial value?
(Take g = 10 ms–2)
A man throws balls with the same speed vertically upwards one after the other at an interval of 2s. What should be the speed of the throw so that more than two balls are in the sky at any time? (Given g = 9.8 m/s2)
A and B are two nails on a horizontal line. AC and BC are two uniform strings from which a weight of 100 N is suspended. The tension of AC is
A body is projected at an angle θ from a point 0. Its angular momentum will be zero at
A 10 kg body slides down on an inclined plane with a force of 10 N. What is the minimum force required to be applied to move up the plane?
A body projected with an initial velocity horizontally has kinetic energy K. If it is projected at an angle of 45°, then the initial kinetic energy will be
Which of the following can be found experimentally using a metre scale and a rubber ball?
A mass is lowered with the help of a cord of length d by a disc at a constant acceleration g/4. The work done by the cord is
If two solid spheres of iron have radii in the ratio 1 : 2, then their moments of inertia will be in the ratio
If vibration of a string is to be two times, then tension in the string must be made
Some soap bubbles have radii in the ratio 2 : 1. The ratio of excess pressure inside them is
A cup of tea cools from 80°C to 60°C in one minute. If the ambient temperature is 30°C, then the time taken by it in cooling from 60°C to 50°C will be
The moment of inertia of a rigid body depends upon
A small disc of radius 2 cm is cut from a disc of radius 6 cm. If the distance between their centres is 3.2 cm, then what is the shift in the centre of mass of the disc?
This question consists of two statements each, printed as Assertion and Reason. While answering the question, you are required to choose any one of the following five responses.
Assertion: Woollen clothes keep the body warm in winter. Reason: Air is a bad conductor of heat.
Assertion: Taking into account the fact that any object which floats must have an average density less than that of water, during World War I, a number of cargo vessels were made of concrete. Reason: Concrete cargo vessels were filled with air.
One end of a copper rod of length 1.0 m and area of cross-section 10 cm2 is immersed in boiling water and the other end in ice. If the coefficient of thermal conductivity of copper is 92 cal/m-s°C and the latent heat of ice is 80 × 103 cal/kg, then the amount of ice which will melt in one minute is
Assertion: First law of thermodynathics does not forbid flow of heat from lower temperature to higher temperature. Reason: Heat supplied to a system is always equal to the increase in its internal energy.
For a gas undergoing an adiabatic process, the relation between temperature and volume is found to be TV0.4 = Constant. This gas must be
If no heat is lost in condensation of x g of steam at 100°C on passing through y gram of ice, then the ratio of y to x is
Two identical gas tanks are placed on two pans of a beam balance. One tank is empty and open to the atmosphere. The second tank is evacuated and then filled with helium until the two tanks balance. The pressure of helium must be
During an experiment, an ideal gas is bound to obey an additional law, VP2 = Constant. The gas is initially at a temperature T and volume V. When it expands to a volume 2V, the temperature becomes
Assertion: To hear distinct beats, difference in frequencies of two sources should be less than 10. Reason: The more the number of beats per second, the more it is difficult to hear them.
A coin is placed on a horizontal platform which undergoes vertical simple harmonic motion of angular frequency ω. If the amplitude of oscillation is gradually increased, the coin will leave contact with the platform for the first time
Assertion: Water in a U-tube executes SHM, the time period for mercury filled up to the same height in the U-tube be greater than that in case of water. Reason: The amplitude of an oscillating pendulum goes on increasing.
Doppler's effect is sound in addition of relative velocity between source and observer. It also depends on the movements of either or both source and observer. Doppler's effect in light depends only on the relative velocity of source and observer. Which of the following is its reason?
The equation y = 4 + 2 sin (6t – 3x) represents a wave motion. The wave speed and amplitude, respectively are
If the energy released in the fission of one nucleus is 3.2 x 10-11 J, then the number of nuclei required per second in a power plant of 16 kW is
A fixed volume of iron is drawn into a wire of length l. The extension x produced in this wire by a constant force F is proportional to
The equation of wave travelling in a string can be written as y = 3 cos π (100t - x), here x is in cm and t is in seconds. Its wavelength is
A particle's potential energy is 1/3rd of the maximum value at a distant of 4 cm from a mean position. The amplitude of the motion is
Which of the following combinations is not correctly matched?
The limiting radius ratio of the complex [Ni(CN)4]2- is
A 0.2 molal acid HX is 20% ionised in a solution having Kf = 1.86 K/m. The freezing point of the solution is
In the following question, two statements are given. One is assertion and the other is reason. Examine the statements carefully and mark the correct answer according to the instructions given below.
Assertion: Higher the molal depression constant of the solvent used, higher will be the freezing point of the solution. Reason: Depression in freezing point does not depend on the nature of the solvent.
The standard reduction potentials at 298 K for the following half-cell reactions are given below:
Zn2+ (aq) + 2e- ⇌ Zn (s); -0.762 V Cr3+ (aq) + 3e- ⇌ Cr (s); -0.74 V 2H+ (aq) + 2e- ⇌ H2 (g); +0.00 V Fe3+ (aq) + e- ⇌ Fe2+ (aq); +0.77 V
Which one of the following is the strongest reducing agent?
A sample of 0.42 mg 233UF6 shows an activity of 9.88 x 104 count per second. Its t1/2 is
In the following question, two statements are given. One is assertion and the other is reason. Examine the statements carefully and mark the correct answer accordingly.
Assertion: Fe3+ can be used for coagulation of As2S3 sol. Reason: Fe3+ reacts with As2S3 to give Fe2S3.
Flux is used to remove
In the following question, a statement of Assertion is given, followed by a corresponding statement of Reason. Read the statements carefully and mark your answer accordingly.
Assertion: HCIO4 is a stronger acid than HCIO3. Reason: Oxidation state of CI in HCIO4 is +7 and in HCIO3 it is +5.
The strongest oxidising agent is
The transition metal with the least atomic number is
The electronic configuration of actinides cannot be assigned with degree of certainty because of
[CoCl2 (NH3)4]+ + CI- → [CoCI3(NH3)3] + NH3
In the above reaction, only one isomer of complex product is obtained. The initial complex is
Which of the following configurations has the crystal field splitting energy as zero with low field as well as high field ligands?
Which of the following ligands is/are ambidentate?
When chloroform is exposed to air and sunlight, the compound obtained is
When alkyl halide is heated with dry Ag2O, it produces
The only alcohol that cannot be prepared by the indirect hydration of alkene is
Which of the following gives the iodoform reaction?
o-toluic acid, on reaction with Br2 + Fe, gives
Reaction of ethyl formate with excess of CH3MgI, followed by hydrolysis, gives
An organic compound A, upon reacting with NH3, gives B. On heating, B gives C. C, in presence of KOH, reacts with Br2 to give CH3CH2NH2. A is
Aniline, on treatment with sodium nitrite and HCI at 0o C, gives which of the following compounds?
Pyridine is less basic than triethylamine because
Find L-serine among the following.
Methyl-α-D-glucoside and methyl-β-D-glucoside are
The digestion of fat in the intestine is aided by
Which of the following cannot be used as a plasticiser to make PVC a flexible plastic?
Envoid-E, the most widely marketed oral contraceptive, is a mixture of
KMnO4 reacts with ferrous sulphate as shown in the following equation:
Here, 10 mL of 0.1 M KMnO4 is equivalent to
The number of significant figures in 1.0024, 1.240 and 0.0020 are respectively
The Vividh Bharti Station of All India Radio Delhi broadcasts on a frequency of 1.368 kHz (kilohertz). Calculate the wavelength (λ) of the electromagnetic radiation emitted by the transmitter. Which part of the electromagnetic spectrum does it belong to?
Cr is a member of 3d transition series of atomic number 24. What is its electronic configuration?
Which of the following ions has the smallest size?
Acrilan is a hard, horny and high-melting material. Which of the following options represents its structure?
The correct order of increasing covalent character is
Assertion: B2 molecule is diamagnetic. Reason: The highest occupied molecular orbital is of σ - type.
The bond in the formation of fluorine molecules will be due to
What will happen to the volume of a bubble of air found under water in a lake, where the temperature is 15oC and the pressure is 1.5 atm, if the bubble rises to the surface where the temperature is 25oC and the pressure is 1.0 atm?
Dominance of strong repulsive forces among the molecules of the gas (Z = Compressibility factor)
Entropy of the universe is
The enthalpies of combustion at 25oC of H2, cyclohexane (C6H12) and cyclohexene (C6H10) are -241 kJ/mol, -3920 kJ/mol and _3800 kJ/mol, respectively. The heat of hydrogenation of cyclohexene is
Assertion: The enthalpy of formation of gaseous oxygen molecules at 298 K and under a pressure of one atmosphere is zero. Reason: The entropy of formation of gaseous oxygen molecule under the same conditions is zero.
A buffer solution is prepared in which the concentration of NH3 is 0.30 M and the concentration of is 0.20 M. If the equilibrium constant, Kb, for NH3 equals 1.8 x 10–5, then what is the pH of this solution? (log 2. 7 = 0.43)
When 10 mL of 0.1 M acetic acid (pKa = 5.0) is titrated against 10 mL of 0.1 M ammonia solution (pKb = 5.0), the equivalence point occurs at pH=
How many grams of CaC2O4 will dissolve in distilled water to make one litre of saturated solution? (Solubility product of CaC2O4 is 2.5 x 10-9 mol2 litre-2 and its molecular weight is 128)
Which reaction involves neither oxidation nor reduction?
In which of the following reactions have the underlined substances been oxidised?
20% volume of H2O2 solution has a strength of about
Which of the following statements is true regarding isolation of Na and K metals?
Colemanite is:
Which of the following products is formed by the reaction of sulphur dioxide with chlorine in presence of sunlight?
When orthoboric acid (H3BO3) is heated, the residue left is
Which of the following statements is incorrect?
Picric acid is
Spin isomerism is shown by
The IUPAC name of is
Among the following, which one can have a meso form?
Assertion: p-O2N – C6H5COCH3 is prepared by Friedel-Craft's acylation of nitrobenzene. Reason: Nitrobenzene easily undergoes electrophilic substitution reaction.
Which of the following water pollutants are mainly responsible for eutrophication?
In Spirogyra, sometimes a ladder like structure is present due to:
Pollination in Rafflesia occurrs through
Pollinia are found in
A microspore mother cell forms
Acrosome is formed by
Barr-body in mammals represents
Which of the following is not a sexually-transmitted disease
Which of the following is not a sexually-transmitted disease?
In which mode of inheritance do you expect more maternal influence among the offspring?
Satellite DNA is a useful tool in
In transgenics, expression of transgene in target is determined by
Appearance of dark-coloured pepper moths among the light-coloured ones, as a result of increased industrial pollution, is an example of
Evolutionary history of an organism is known as
Antigen binding site in an antibody is found between
Which of the following is not correctly matched?
In Entamoeba histolytica, the presence of chromatid bodies is characteristic of
AIDS is characterised by a sharp reduction in
Which of the following is correctly matched?
Three crops that contributed maximum to global foodgrain production are
Which of the following statements are correct with reference to the action of bacteria?
A. Ammonifying bacteria release ammonia in the soil by decay and putrefaction. B. Nitrifying bacteria convert ammonia to nitrates directly. C. Nitrogen fixing bacteria can be symbiotic or non-symbiotic. D. Acetobacter aceti helps in the production of acetone. E. Mycoderma aceti converts sugar solution to acetic acid.
pBR322, which is frequently used as a vector for cloning gene in E. coli, is a/an
Sequence of which of the following is used to know the phylogeny?
Transformation in bacteria was discovered by
For better survival of Indian human population, which is the most important step?
Animals undergo inactive stage during winter, which is known as
If the high-altitude birds become rare or extinct, the plant(s) which may disappear along with them is/are
Abundance of a species in a population, within habitat, is called
Which of the following species are restricted to a given area?
At what latitude, heat gain through insolation approximately equals heat loss through terrestrial radiation?
Maximum greenhouse gases are released by
Which of the following organisms completely lack cell wall, are the smallest living cells known and can survive without oxygen?
The thalloid body of a slime mould (Myxomycetes) is known as
In which of the following groups are seeds present?
Which of the following is a fungus?
Acoelomate, triploblastic body with bilateral symmetry is a characteristic of
Synsacrum of fowl consists of
Class Crustacea differs from insects in having
To which of the following classes does Antedon belong?
Which of the following is the simplest amino acid?
Sciatic vein of frogs opens in the
Small disc-shaped structures at the surface of the centromeres that bind spindle fibres to the chromosomes are
Assertion: A cell membrane shows fluid behaviour. Reason: A membrane is a mosaic or composite of diverse lipids and proteins.
Tay-Sachs disease results due to lack of enzyme
Hydathode helps in
What is the name given to the soil stratum containing groundwater?
A group of cells present around a vein ending of a leaf for retrieving solutes from exuding sap is called ___________.
The carbon dioxide acceptor in C3-plants is
In plants having Hatch and Slack pathway,
The source of O2 liberated in photosynthesis is
Glycolysis occurs in
Avena curvature test is a bioassay for examining the activity of
Which of the following is the largest gland in an adult human?
Deoxyribonuclease and ribonuclease are secreted by
The pylorus is the constricted part of the alimentary canal between
Rh factor is present in
What is correct regarding leucocytes?
Which of the following substances leaves the liver and moves towards kidney?
Pick out the correct match:
In the blind spot, where the optic nerves leave the eyes,
The cornea is a very important component of the human eye. The main function of the cornea is to
Which one of the following four glands is correctly matched with the accompanying description?
In the following question, there is a relationship between the two terms to the left of (: :) and the same relationship exists between the two terms to its right. One term is missing. Find the missing term from the given alternatives.
392 : 28 : : 722 : ?
In the following question, there is a relationship between the two terms to the left of (: :) and the same relationship exists between the two terms to its right. One term is missing. Find the missing term from the given alternatives. 392 : 28 : : 722 : ?
What will be the next term of the given series?
Z, XW, UTS, QPON, …
Find the odd one out from among the given options.
If A is coded as C, B as D, C as E, and so on, then what is the code for ENGINE?
Read the following information carefully to answer the question given below.
'M @ N' means 'M is the sister of N'. 'M & N' means 'M is the brother of N'. 'M $ N' means 'M is the father of N'. 'M % N' means 'M is the mother of N'.
What is the relation between L and X in 'V @ X & Y $ Z @ L'?
How many dots are there on the face opposite to the one with three dots?\
Study the following information to answer the question: A blacksmith has five iron articles P, Q, R, S and T, each having a different weight. i. P weighs twice as much as Q. ii. Q weighs four and a half times as much as R. iii. R weighs half as much as S. iv. S weighs half as much as T. Which of the following is the lightest?
A cube is painted red on all faces. It is then cut into 64 smaller cubes of equal size. How many cubes are there which have only one coloured face?
Which person won two games?
In the following question, two statements are followed by two conclusions numbered I and II. You have to consider everything given in the statements to be true, although they may seem to be at variance from the commonly accepted facts and then decide which of the given conclusions logically follow(s) from the statements.
Statements: Some actors are emperors. Some emperors are cruel. Conclusions: I. All the cruel are actors. II. All the cruel are emperors.
The World Wars are the price that man paid due to
According to the writer, the adoption of wrong means even for the right end would
The word 'vitiate' used in the second paragraph means
Out of the four alternatives, choose the one that best expresses the meaning of the given word.
DIGNITY
FEIGN
Out of the four alternatives, choose the correct antonym of the given word.
EMBRACE
JOLLY
Four alternatives are given for the idiom/phrase underlined in the sentence. Choose the alternative that best expresses its meaning.
He is the manager's right-hand man and is a vital team member.
In the given question, a part of the sentence is underlined. Below are given alternatives to the underlined part as (1), (2) and (3), which may improve the sentence. Choose the correct alternative. In case 'no improvement' is needed, your answer is (4).
He enjoys to tell stories to children.
In the given question, a part of the sentence is underlined. Below are given alternatives to the underlined part as (1), (2) and (3), which may improve the sentence. Choose the correct alternative. In case 'no improvement' is needed, your answer is (4). He enjoys to tell stories to children.
In the given question, rearrange the parts - P, Q, R and S - to make the sentence meaningful. Four alternatives are given below. Choose the option with correct sequence.
No amount poor countries if they do (P)/ of direct aid will help (Q)/ not develop the capacity to (R)/ generate wealth for themselves (S)
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is 0.20 M. If the equilibrium constant, Kb, for NH3 equals 1.8 x 10–5, then what is the pH of this solution?
is
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