Matter in Our Surroundings - MCQs | CBSE Class 9, NCERT Science (Chemistry) Multiple Choice Questions

CBSE Guide for Class 9 NCERT Science (Chemistry)

Solved MCQ (Multiple Choice Questions) | Cbse Ncert Solution

Matter in Our Surroundings

Question.1: On Kelvin scale 0^OC is equal to –

(a) 273 K

(b).– 273 K

(c) 0 K

(d) 100 K

Question.2: Liquids have -

(a) fixed volume and fixed shape 

(b) fixed shape and no fixed volume

(c) fixed volume and no fixed shape   

(d) neither fixed volume nor fixed shape 

Question.3: Dry ice means –

(a) solid SO²

(b) solid water

(c) solid CO²

(d) solid CO

Question.4: Materials existing as liquids have -

(a) boiling point and melting point above room temperature

(b) boiling point and melting point below room temperature

(c) boiling point above room temperature and melting point below room temperature

(d) boiling point and melting point below room temperature

Question.5: Which of the following is accompanied by cooling?

(a) vaporization

(b) evaporation

(c) condensation

(d) none of these.

Question.6: Intermolecular force of attraction is maximum in -

(a) solids

(b) liquids

(c) gases

(d) plasma particles

Question.7: When we add sugar in water, particles of sugar disappear because they - 

(a) are very small

(b) get into the spaces between water particles

(c) are moving

(d) all above

Question.8: One small crystal of potassium permanganate may contain particles -  

(a) more than 10³

(b) more than 10⁴

(c) more than 10⁵

(d) more than 10⁶

Question.9: Which of the following statements is not correct? 

(a) The density of ice is less than the density of water.

(b) To convert a temperature on the Kelvin scale to Celsius scale, subtract 273 from the given temperature.

(c) To convert a temperature on the Celsius scale to Kelvin scale, add 273 to the given temperature.

(d) Vaporization of a liquid causes cooling.

Question.10: Which of the following pairs will not exhibit diffusion?

(a) hydrogen, oxygen

(b) oxygen, water

(c) salt, sand

(d) sugar, water

Question.11: Which of the following substances becomes liquid easily upon heating?

(a) butter

(b) glass

(c) sponge

(d) rubber band

Question.12: The temperature at which the solid melts to become a liquid at the atmospheric pressure is called –

(a) boiling point

(b) melting point

(c) freezing point

(d) none of these.

Question.13: Which one of the following properties are not characteristics of liquids?

(a) fluidity

(b) definite shape

(c) definite volume

(d) compressibility

Question.14: Large volume of compressed natural gas (CNG) is available in small cylinders to us due to its property of - 

(a) high inflammability

(b) easy availability

(c) high compressibility

(d) low density

Question.15: The compressibility of which state of matter is high –

(a) solid

(b) liquid

(c) gas

(d) all of these.

Question.16: A state of matter which has neither definite shape nor definite volume –

(a) solid

(b) liquid

(c) gas

(d) none of these.

Question.17: Gases are liquefied under

(a) high pressure, high temperature

(b) high pressure, low temperature

(c) low pressure, high temperature

(d) low pressure, low temperature

Question.18: Which of the following changes represent sublimation?

(a) solid ó liquid

(b) solid ó gas

(c) liquid ó gas

(d) gas ó liquid ó gas

Question.19: Gases do not have -

(a) high compressibility

(b) high fluidity

(c) high density

(d) large volume

Question.20: Which of the following is the simplest form of matter?

(a) element

(b) mixture

(c) compound

(d) none of these

Question.21: Evaporation of a material takes place -

(a) above its boiling point

(b) above its melting point

(c) below its boiling point

(d) below its melting point

Question.22: Particles of a liquid -

(a) are most ordered

(b) move randomly

(c) have large intermolecular spaces

(d) can slip and slid over each other

Question.23: Which is not the characteristic of matter –

(a) particles of a matter are continuously moving,

(b) particles of matter move faster on increasing temperature,

(c) particles of matter intermix with each other on their own,

(d) particles of all maters have same kinetic energy.

Question.24: The fluorescent tubes and neon sign bulbs glow because of -

(a) presence of charged particles

(b) high density of gases

(c) high temperature

(d) high applied voltage

Question.25: Which of the following will not sublime ?

(a) Camphor

(b) ammonium chloride

(c) bromine

(d) iodine

Answers / Solutions:

1 – a. 2 - c. 3 – c. 4 - c. 5 – b. 6 - a. 7 - d. 8 - d. 9 – d. 10 - c. 11 - a. 12 – b. 13 - b. 14 - c. 15 – c. 16 – c. 17 - b. 18 - b. 19 - c. 20 – a. 21 - c. 22 - d. 23 – d. 24 - a. 25 – c.    

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