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Class 9

Explore popular questions from Matter in Our Surroundings for Class 9. This collection covers Matter in Our Surroundings previous year Class 9 questions hand picked by experienced teachers.

Matter in Our Surroundings

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Q 1. According to ancient philosophers matter consists of

A

three constituents

B

four constituents

five constituents

D

six constituents

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Q 2. Which of the following is not matter?

A

air

feeling of cold

C

dust

D

humidity

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Q 3. Which of the following statements is not correct?

Matter is continuous in nature

B

Interparticle spaces are maximum in the gaseous state of a substance

C

Particles which constitute the matter follow a zig-zag path

D

Solid state is the most compact state of a substance

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Q 4. The mass per unit volume of a substance is called :

density

B

valency

C

solubility

D

none of above

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Q 5. A gas can be best liquefied

A

by increasing the temperature

B

by lowering the pressure

by increasing the pressure and reducing the temperature

D

none of these is correct

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Q 6. Evaporation of a material takes place :

A

above its boiling point

below its boiling point

C

at its melting point only

D

below its melting point

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Q 7. Which of the following exists as gas?

A

Petrol

Helium

C

Sodium

D

Iodine

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Q 8. 10°C temperature is equal to

A

163 K

B

10 K

C

183 K

283 K

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Q 9. Which of the following will respond to sublimation?

A

Common salt

B

Sugar

Camphor

D

Potassium nitrate

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Q 10. Which of the following statements do not go with the liquid state?

A

Particles are loosely packed in the liquid state

Fluidity is the maximum in the liquid state

C

Liquids cannot be compressed

D

Liquids take up the shape of any container in which they are placed

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Q 11.

Column IColumn II
(A) Spread sweet odour into the atmosphere(P) Sublimation
(B) Change of liquid state to gaseous state(Q) Diffusion
(C) Change of solid state directly to gaseous state(R) Condensation
(D) The gas changing to a liquid(S) Vaporization

(A)-(Q), (B)-(S), (C)-(P), (D)-(R)

B

(A)-(Q), (B)-(R), (C)-(Q), (D)-(S)

C

(A)-(Q), (B)-(R), (C)-(Q), (D)-(P)

D

(A)-(S), (B)-(Q), (C)-(R), (D)-(P)

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Q 12. The physical state of water at 100°C is

A

Solid

B

Liquid

Gas

D

None of these

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Q 13. The state of matter that can be easily compressed is

A

Solid

B

Liquid

Gas

D

Super cooled solid

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Q 14. A substance which has a definite volume but no definite shape is

A

Solid

Liquid

C

Gas

D

None of these

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Q 15. The change from vapour to liquid is called

Condensation

B

Fusion

C

Sublimation

D

None of these

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Q 16. The melting point of ice is

273.16 K

B

373.16 K

C

283.16 K

D

263.16 K

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Q 17. The change from solid to gas directly is called

A

Vaporization

Sublimation

C

Condensation

D

None of these

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Q 18. Diffusion is a property of matter, based on

Motion of its particles

B

Size of its particles

C

Pressure

D

Temperature

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Q 19. The SI unit of temperature is

A

Celsius

Kelvin

C

Fahrenheit

D

None of these

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Q 20. The process of changing liquid into solid is called

A

Evaporation

Freezing

C

Condensation

D

Sublimation

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Q 21. The state of which 99% matter of the universe is

Plasma

B

Solid

C

Gaseous

D

Liquid

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Q 22. The tendency of non-reacting gases to mix with each other is called as

A

Chemical reaction

Diffusion

C

Effusion

D

Explosion

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Q 23. Which of the following are states of matter?

A

Solid

B

Liquid

C

Gas

All of the above

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Q 24. Physical state of matter can be changed by

change of pressure

B

change of volume

C

change of time

D

change of composition

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Q 25. Solids have/can

Fixed shape

B

Variable volume

C

Flow easily

D

Low densities