Chapter 2 Chemistry Class 9 Extra Questions. We covered all the Chapter 2 Chemistry Class 9 Extra Questions in this post for free so that you can practice well for the exam.
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Chapter 2 Chemistry Class 9 Extra Objective Questions for Students
Which type of colloidal system is expressed in the fog?
(a) Liquid in a gas
(b) Gas in a liquid
(c) Solid in a gas
(d) Liquid in liquid
Option a – Liquid in a gas
Which is a natural colloid?
(a) Urea
(b) Cane sugar
(c) Blood
(d) Sodium chloride
Option c – Blood
Gelatin is a lyophilic colloid. It is mostly used in making ice-creams to:
(a) Prevent making a colloid.
(b) Stabilize the colloid and prevent crystallization.
(c) Stabilize the mixture.
(d) Enrich the aroma.
Option b – Stabilize the colloid and prevent crystallization
Which one of the following is the best example of a desiccant?
(a) Silica gel
(b) Polystyrene
(c) Sodium chloride
(d) Sodium carbonate
Option a – Silica gel
A substance that readily forms a colloidal solution in contact with water is called:
(a) Extrinsic colloid
(b) Associated colloid
(c) Hydrophobic colloid
(d) Hydrophilic colloid
Option d – Hydrophilic colloid
Colloidal medicines are more effective because:
(a) The germs move towards them.
(b) They are cheap.
(c) They are easily assimilated and absorbed.
(d) They are easy to prepare.
Option c – They are easily assimilated and absorbed
Which of the following colloidal solutions is commonly used as a germ killer?
(a) Colloidal sulfur
(b) Colloidal gold
(c) Colloidal silver
(d) Colloidal antimony
Option a – Colloidal sulfur
Cloud is a colloidal dispersion of:
(a) Air in a dispersion medium of water.
(b) Fog in a dispersion medium of water.
(c) Mist in a dispersion medium of air.
(d) Water drops in a dispersion medium of air.
Option d – Water drops in a dispersion medium of air
Butter is a colloid formed when:
(a) Fat is dispersed in water.
(b) Fat globules are dispersed in water.
(c) Water is dispersed in fat.
(d) Suspension of casein in water.
Option c – Water is dispersed in fat
Which of the following is an example of a colloidal solution of liquid in solid?
(a) Mud
(b) Milk
(c) Cheese
(d) Rubber
Option c – Cheese
Which of these is not a colloid?
(a) Milk
(b) Blood
(c) Ice-cream
(d) Honey
Option d – Honey
Which one of the following colloidal systems is represented by soda water?
(a) Liquid in gas
(b) Gas in liquid
(c) Solid in gas
(d) Liquid in liquid
Option b – Gas in liquid
We covered all the chapter 2 chemistry class 9 extra questions above in this post for free so that you can practice well for the exam.
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