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Class 10 Science MCQ in Hindi

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Class 10 Science MCQ in Hindi. We covered all the Class 10 Science MCQ in Hindi in this post for free so that you can practice well for the exam.

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Mock Test on Science for Class 10 Students

Which one of the following statements is not correct?

(a) In the steady flow of a liquid, the velocity of liquid particles reaching a particular point is the same at all points.

(b) Steady flow is also called streamlined flow.

(c) In steady flow, each particle may not follow the same path as taken by a previous particle passing through that point.

(d) Two streamlines cannot intersect with each other.

Option c - In steady flow, each particle may not follow the same path as taken by a previous particle passing through that point

Viscosity is the property of liquids by virtue of which they

(a) attract other molecules.

(b) become conducting.

(c) oppose the relative motion of its parts.

(d) push neighboring molecules.

Option c - oppose the relative motion of its parts

Which State of India experiences the maximum annual variation of rainfall?

(A) Meghalaya

(B) Kerala

(C) Rajasthan

(D) West Bengal

Show Answer

A liquid disturbed by string comes to rest due to

(a) density

(b) surface tension

(c) viscosity

(d) centripetal force

Option c - viscosity

With the rise of temperature, the viscosity of liquid

(a) increases

(b) decreases

(c) remains unchanged

(d) may increase or decrease depending on nature of liquid

Option b - decreases

Pakyong Airport is located in?

(A) Sikkim

(B) Jammu and Kashmir

(C) Arunachal Pradesh

(D) Mizoram

Show Answer

Consider the following statements. I. The viscosity of a gas increases with rise in temperature. II. The viscosity of the liquid falls very rapidly with rise in temperature. Which of the statement(s) given above is/are correct?

(a) Only I

(b) Only II

(c) Both I and II

(d) Neither I nor II

Option c - Both I and II

Assertion (A) Machine parts or jammed in winter. Reason (R) The viscosity of lubricant used in machine parts increase at low temperature. Codes

(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) A is false, but R is true

Option a - Both A and R are true and R is the correct explanation of A

Bernoulli's principle is based on the law of conservation of

(a) angular momentum

(b) linear momentum

(c) mass

(d) energy

Option d - energy

The working of venturimeter is based on

(a) Torricelli's Law

(b) Pascal's Law

(c) Bernoulli's Theorem

(d) Archimede's Principle

Option c - Bernoulli's Theorem

The working of an atomiser depend upon

(a) Bernoulli's Theorem

(b) Boyle's Law

(c) Archimedes Principle

(d) None of the above

Option a - Bernoulli's Theorem

An application of Bernoulli's equation for fluid flow is found in

(a) dynamic lift of an aeroplane

(b) viscosity meter

(c) capillary rise

(d) Hydraulic press

Option a - dynamic lift of an aeroplane

A man standing close to the platform at a railway station experiences a pulling force towards a fast moving train because of ………

(a) gravitational force between train and man

(b) illusion of the man

(c) the centripetal force

(d) pressure difference due to fast moving air in between

Option d - pressure difference due to fast moving air in between

Two cars, passing each other at high speed, are in danger of side swiping because

(a) of the increase in air pressure in the space between them.

(b) of decrease in the velocity of air molecules between them.

(c) of decrease in air pressure in the space between them.

(d) of the increase in the velocity of air molecules between them.

Option c - of decrease in air pressure in the space between them

Soap bubble attains spherical shape due to ……..

(a) inertia

(b) pressure

(c) surface tension

(d) viscosity

Option c - surface tension

Along a streamline flow of fluid,

(a) the velocity of all fluid particles at a given instant is constant

(b) the speed of a fluid particle remains constant.

(c) the velocity of all fluid particles crossing a given position is constant.

(d) the velocity of a fluid particle remains constant.

Option c - the velocity of all fluid particles crossing a given position is constant

It is easier to swim in a sea water than in ordinary water because

(a) sea water contains salt.

(b) atmospheric pressure is highest at the sea level.

(c) density of sea water is less than that of ordinary water.

(d) density of sea water is higher than that of ordinary water.

Option d - density of sea water is higher than that of ordinary water

Whether an object will float or sink in a liquid, depends on

(a) mass of the object only.

(b) mass of the object and density of liquid only.

(c) difference in the densities of the object and liquid.

(d) mass and shape of the object only.

Option c - difference in the densities of the object and liquid

A body is just floating in a liquid if the body is slightly pressed down and released. It will

(a) start oscillating

(b) sink to the bottom

(c) come back to the same position immediately

(d) come back to the same position stable

Option b - sink to the bottom

A boat full of iron nails is floating on water in a lake. When the iron nails are removed, the water level

(a) rises

(b) falls

(c) cannot be determined

(d) remains constant

Option b - falls

A body is floating in a liquid partly immersed. The body and the liquid are taken to moon. The body

(a) will continue to float as before.

(b) floats with greater part immersed.

(c) floats with lesser part immersed.

(d) will sink

Option c - floats with lesser part immersed

Consider the following statements. The fraction of a ball floating inside the liquid depends upon I. Density of the liquid II. Mass of the ball III. Density of the ball Which of the statements given above are correct?

(a) I and II

(b) II and III

(c) I and III

(d) I, II and III

Option c - I and III

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