NEET JEE Physics — Assertion & Reason 60 QUIZ Tests SEPTEMBER 1

NEET Physics — Assertion & Reason MCQ Tests

3 Tests × 20 Questions = 60 Questions

Question Instruction: For each question, an Assertion (A) is followed by a Reason (R). Mark the correct answer.

(a) Both A and R are true, and R correctly explains A   (b) Both true, but R does not explain A   (c) A true, R false   (d) Both false   (e) A false, R true

Test 1 — Assertion & Reason

Question 1

Assertion (A): Density of all the nuclei is same.

Reason (R): Radius of nucleus is directly proportional to the cube root of mass number.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 2

Assertion (A): Danger signals are made of red colour.

Reason (R): Velocity of red light is maximum and thus more visibility in dark.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 3

Assertion (A): Current and time both have direction as well as magnitude but still are not considered as vector.

Reason (R): Current and time do not follow laws of vector addition.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 4

Assertion (A): If polar ice melts, days will be longer.

Reason (R): Moment of inertia increases and thus angular velocity decreases.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

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Question 5

Assertion (A): Endoscopy involves use of optical fibres to study internal organs.

Reason (R): Optical fibres are based on phenomena of total internal reflection.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 6

Assertion (A): Cyclotron does not accelerate electrons.

Reason (R): Mass of electrons is very small.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 7

Assertion (A): Good conductors of heat are also good conductors of electricity and vice versa.

Reason (R): Mainly electrons are responsible for these conductions.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 8

Assertion (A): Air at some distance above the fire is hotter than the same distance below it.

Reason (R): Air surrounding the fire carries heat upwards.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

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Question 9

Assertion (A): If a convex lens is kept in water its convergent power decreases.

Reason (R): Focal length of convex lens in water increases.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 10

Assertion (A): If current is flowing through a machine of iron eddy currents are produced.

Reason (R): Change in magnetic flux through an area causes eddy currents.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 11

Assertion (A): Centripetal force does no work.

Reason (R): Force and displacement are perpendicular to each other.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 12

Assertion (A): Skiers use air glasses.

Reason (R): Light reflected by snow is partially polarised.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

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Question 13

Assertion (A): LASER is used to measure distant objects such as the moon.

Reason (R): They are highly coherent sources of light.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 14

Assertion (A): Work done in uniform circular motion is zero.

Reason (R): Force is always directed along displacement.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 15

Assertion (A): At pole value of acceleration due to gravity is greater than that of equator.

Reason (R): Earth rotates on its axis in addition to revolving round the sun.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 16

Assertion (A): During reverse biasing a diode doesn't conduct current.

Reason (R): It narrows the depletion layer.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

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Question 17

Assertion (A): On increasing the frequency of light larger number of photoelectrons are emitted.

Reason (R): The number of electrons emitted depends on the intensity of incident light.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 18

Assertion (A): Soldiers are asked to break steps while crossing the bridge.

Reason (R): The frequency of marching may be equal to the natural frequency of bridge and may lead to resonance which can break the bridge.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 19

Assertion (A): The time period of revolution of a satellite around a planet is directly proportional to the radius of the orbit of the satellite.

Reason (R): Artificial satellites do not follow Kepler's laws of planetary motion.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 20

Assertion (A): Electric appliances with metallic body, e.g. heaters and presses, have three-pin connections, whereas an electric bulb has a two-pin connection.

Reason (R): Three-pin connections reduce heating of connecting cables.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Test 2 — Assertion & Reason

Question 1

Assertion (A): Planet is a heavenly body revolving round the sun.

Reason (R): Star is luminous body made of gaseous material.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 2

Assertion (A): Coloured spectrum is seen when we look through a muslin cloth.

Reason (R): It is due to the diffraction of white light on passing through fine slits.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 3

Assertion (A): When tiny circular obstacle is placed in the path of light from some distance, a bright spot is seen at the centre of the shadow of the obstacle.

Reason (R): Destructive interference occurs at the centre of the shadow.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 4

Assertion (A): The quantity L/R possesses dimension of time.

Reason (R): To reduce the rate of increase of current through a solenoid, we should increase the time constant (L/R).

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

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Question 5

Assertion (A): In a simple battery circuit, the point of the lowest potential is positive terminal of the battery.

Reason (R): The current flows towards the point of the higher potential, as it does in such a circuit from the negative to the positive terminal.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 6

Assertion (A): We use a thick wire in the secondary of a step-down transformer to reduce the production of heat.

Reason (R): When the plane of the armature is parallel to the line of force of magnetic field, the magnitude of induced e.m.f. is maximum.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 7

Assertion (A): We cannot think of a magnetic field configuration with three poles.

Reason (R): A bar magnet does exert a torque on itself due to its own field.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 8

Assertion (A): Thin films such as a soap bubble or a thin layer of oil on water show beautiful colours when illuminated by white light.

Reason (R): It happens due to the interference of light reflected from the upper surface of the thin film.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

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Question 9

Assertion (A): Quasar emits radiowaves more than radio galaxy.

Reason (R): Quasar has a very small size.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 10

Assertion (A): S.I. units are logical and coherent.

Reason (R): S.I. system of units is a rationalized system.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 11

Assertion (A): It is difficult to move a cycle along the road with its brakes on.

Reason (R): Sliding friction is greater than rolling friction.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 12

Assertion (A): Faraday's laws are consequences of conservation of energy.

Reason (R): In a purely resistive A.C. circuit, the current lags behind the e.m.f. in phase.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

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Question 13

Assertion (A): The flash of lightning is seen before the sound of thunder is heard.

Reason (R): Speed of sound is greater than speed of light.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 14

Assertion (A): Blue star is at higher temperature than red star.

Reason (R): Wien's displacement law states that T is proportional to 1/lambda_m.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 15

Assertion (A): The time-period of pendulum on a satellite orbiting the earth is infinity.

Reason (R): Time-period of a pendulum is inversely proportional to square root of g.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 16

Assertion (A): Stress is the internal force per unit area of a body.

Reason (R): Rubber is more elastic than steel.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

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Question 17

Assertion (A): In an elastic collision of two billiard balls, the total kinetic energy is conserved during the short time of oscillation of the balls when they are in contact.

Reason (R): Energy spent against friction does not follow the law of conservation of energy.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 18

Assertion (A): The earth without its atmosphere would be inhospitably cold.

Reason (R): All heat would escape in the absence of atmosphere.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 19

Assertion (A): In simple harmonic motion, the motion is to and fro and periodic.

Reason (R): Velocity of the particle v is proportional to the square root of (A² − x²).

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 20

Assertion (A): Woolen clothes keep the body warm in winter.

Reason (R): Air is a bad conductor of heat.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Test 3 — Assertion & Reason

Question 1

Assertion (A): Temperatures near the sea coast are moderate.

Reason (R): Water has a high thermal conductivity.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 2

Assertion (A): The earth is slowing down and as a result the moon is coming nearer to it.

Reason (R): The angular momentum of the earth-moon system is not conserved.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 3

Assertion (A): A tube light emits white light.

Reason (R): Emission of light in a tube takes place at a very high temperature.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 4

Assertion (A): Radioactive nuclei emit beta particles.

Reason (R): Electrons exist inside the nucleus.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

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Question 5

Assertion (A): The resistivity of a semiconductor increases with temperature.

Reason (R): The atoms of a semiconductor vibrate with larger amplitude at higher temperatures thereby increasing its resistivity.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 6

Assertion (A): The Coulomb force is the dominating force in the universe.

Reason (R): The Coulomb force is weaker than the gravitational force.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 7

Assertion (A): The length of the day is slowly increasing.

Reason (R): The dominant effect causing a slowdown in the rotation of the earth is the gravitational pull of other planets in the solar system.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 8

Assertion (A): Bohr had to postulate that the electrons in stationary orbits around the nucleus do not radiate.

Reason (R): According to classical physics all moving electrons radiate.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

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Question 9

Assertion (A): The possibility of an electric bulb fusing is higher at the time of switching on and off.

Reason (R): Inductive effects produce a surge at the time of switch-off and switch-on.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 10

Assertion (A): The stars twinkle while the planets do not.

Reason (R): The stars are much bigger in size than the planets.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 11

Assertion (A): A beam of charged particles is employed in the treatment of cancer.

Reason (R): Charged particles on passing through a material medium lose their energy by causing ionization of the atoms along their path.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 12

Assertion (A): When a beetle moves along the sand within a few tens of centimeters of a sand scorpion, the scorpion immediately turns towards the beetle and dashes towards it.

Reason (R): When a beetle disturbs the sand, it sends pulses along the sand's surface. One set of pulses is longitudinal while the other set is transverse.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

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Question 13

Assertion (A): When a bottle of cold carbonated drink is opened, a slight fog forms around the opening.

Reason (R): Adiabatic expansion of the gas causes lowering of temperature and condensation of water vapours.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 14

Assertion (A): The size of a hydrogen balloon increases as it rises in air.

Reason (R): The material of the balloon can be easily stretched.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 15

Assertion (A): Owls can move freely during night.

Reason (R): They have large number of rods on their retina.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 16

Assertion (A): It is hotter over the top of a fire than at the same distance on the sides.

Reason (R): Air surrounding the fire conducts more heat upwards.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

More NEET & JEE Practice: NEET Tamil Medium Papers

Question 17

Assertion (A): The amplitude of an oscillating pendulum decreases gradually with time.

Reason (R): The frequency of the pendulum decreases with time.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 18

Assertion (A): Micro wave communication is preferred over optical communication.

Reason (R): Microwaves provide large number of channels and bandwidth compared to optical signals.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 19

Assertion (A): Neutrons penetrate matter more readily as compared to protons.

Reason (R): Neutrons are slightly more massive than protons.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

Question 20

Assertion (A): In high altitudes one sees colourful curtains of light hanging down from high altitudes.

Reason (R): The high energy charged particles from the sun are deflected to polar regions by the magnetic field of the earth.

(a) Both A and R are true, and R is the correct explanation of A (b) Both A and R are true, but R is not the correct explanation of A (c) A is true, but R is false (d) Both A and R are false (e) A is false, but R is true

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SCIENCE

10th Science Test Papers

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MATHEMATICS

10th Maths Test Papers

Practice Mathematics test papers and exam preparation resources.

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LANGUAGE

10th English Test Papers

English test papers, questions and preparation resources for 10th State Board.

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LANGUAGE

10th Tamil Test Papers

Tamil test papers, questions and revision resources for 10th State Board.

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LEARNING MATERIAL

10th Minimum Learning Materials

Access minimum learning materials and support resources for 10th State Board students preparing for examinations.

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ONLINE QUIZ

Online Quiz

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CBSE Class 12 Study Materials

Access CBSE Class 12 answers, practice papers, subject-wise study materials, revision resources and online quizzes for exam preparation.

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ANSWERS

CBSE Class 12 Answers

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PRACTICE PAPERS

CBSE 12th Practice Papers

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SUBJECT

CBSE Class 12 Maths

Class 12 Mathematics study materials, questions and revision resources.

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SCIENCE

CBSE Class 12 Physics

Physics study materials, questions and preparation resources for Class 12.

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SCIENCE

CBSE Class 12 Chemistry

Chemistry study materials, questions, revision content and preparation resources.

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SCIENCE

CBSE Class 12 Biology

Biology study materials, questions and revision resources for Class 12 students.

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COMPUTER

Computer Science

Class 12 Computer Science study materials, questions and preparation resources.

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COMMERCE

CBSE Class 12 Accountancy

Accountancy study materials, questions, revision resources and preparation content.

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COMMERCE

CBSE Class 12 Economics

Economics study materials, questions and revision resources for Class 12.

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COMMERCE

Business Studies

Class 12 Business Studies materials, questions and exam preparation resources.

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ALL SUBJECTS

CBSE Class 12 All Subjects Study Materials

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LANGUAGE

CBSE Class 12 English

English study materials, questions, revision resources and exam preparation.

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ONLINE QUIZ

Online Quiz

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CBSE Class 10 Study Materials

Access CBSE Class 10 answers, subject-wise study materials, practice papers, online quizzes and resources for all major subjects.

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ANSWERS

CBSE Class 10 Answers

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PRACTICE PAPERS

CBSE 10th Practice Papers

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SUBJECT

CBSE Class 10 Maths

Class 10 Mathematics study materials, questions and preparation resources.

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SUBJECT

CBSE Class 10 Science

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SUBJECT

CBSE Class 10 English

English study materials, preparation content and revision resources for Class 10.

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SUBJECT

CBSE Class 10 Social Science

Access Social Science study materials, questions and preparation resources.

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ALL SUBJECTS

CBSE Class 10 All Subjects Study Materials

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SUBJECT

CBSE Class 10 Hindi

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ONLINE QUIZ

Online Quiz

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NEET Study Materials & Practice

Access NEET answers, practice papers and English Medium and Tamil Medium study resources.

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NEET ENGLISH

NEET English Answers

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NEET TAMIL

NEET Tamil Answers

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PRACTICE

NEET Practice Papers

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ENGLISH MEDIUM

NEET English Medium

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TAMIL MEDIUM

NEET Tamil Medium

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TNPSC & Competitive Exam Resources

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TNPSC

TNPSC Free Study Materials

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9TH STANDARD

9th State Board Practice

Practice 9th Standard State Board questions and test your preparation.

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8TH STANDARD

8th State Board Practice

Practice 8th Standard State Board questions and improve your preparation.

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7TH STANDARD

7th State Board Practice

Practice 7th Standard State Board questions for competitive exam preparation.

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6TH STANDARD

6th State Board Practice

Practice 6th Standard State Board questions and strengthen your fundamentals.

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COMPETITIVE EXAMS

TNPSC TET TRB NMMS

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PRACTICE TESTS

TNPSC Online Practice

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TAMIL

10th, 11th & 12th Tamil

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ONLINE QUIZ

Online Quiz

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