CBSE Class 9 - Chemistry - Matter in Our Surroundings (MCQs) (#cbsenotes)(#eduvictors)

Matter in Our Surroundings
(MCQs)

1. ______ is a physical quantity which expresses the amount of matter in a body.

(A) Mass
(B) Density
(C) Volume
(D) Temperature


2. The space inside a container that is occupied by matter is its ______.

(A) density
(B) mass
(C) volume
(D) shape


3. ______ is the ratio of mass of a substance to its volume.

(A) Viscosity
(B) Fluidity
(C) Density
(D) Elasticity




4. Which one of the following sets of phenomena would increase on raising the temperature?

(A) Diffusion, evaporation, compression of gases
(B) Evaporation, compression of gases, solubility
(C) Evaporation, diffusion, expansion of gases
(D) Evaporation, solubility, diffusion, compression of gases


5. Solids are usually ______ since their particles are closely packed together.

(A) soft
(B) spongy
(C) compressible
(D) hard


6. During summer, water kept in an earthen pot becomes cool because of the phenomenon of

(A) diffusion
(B) transpiration
(C) osmosis
(D) evaporation


7. The phase or state of matter can change when the ______ of the substance changes.

(A) temperature
(B) mass
(C) weight
(D) amount

8. ______ is a process in which solids go directly into gaseous state without going through the liquid state.

(A) Evaporation
(B) Sublimation
(C) Boiling
(D) Melting


9. ______ is the formation of liquid drops from vapour.

(A) Evaporation
(B) Condensation
(C) Boiling
(D) Melting


10. When a sample of hot water is cooled slowly to room temperature, the temperature of the sample _______.

(A) increases
(B) decreases
(C) remains constant
(D) either increases or decreases


Answer:
1: (A) Mass
2: (C) volume
3: (C) Density
4: (C) Evaporation, diffusion, expansion of gases
5: (D) hard
6: (D) evaporation
7: (A) temperature
8: (B) Sublimation
9: (B) Condensation
10: (B) decreases