In This Post we are  providing Chapter-5 Surface Chemistry NCERT MCQ for Class 12 Chemistry which will be beneficial for students. These solutions are updated according to 2021-22 syllabus. These MCQS  can be really helpful in the preparation of Board exams and will provide you with a brief knowledge of the chapter.

NCERT MCQ ON SURFACE CHEMISTRY

Question 1.
Movement of dispersion medium under the influence of electric field is known as
(a) electrodialysis
(b) electrophoresis
(c) electro osmosis
(d) cataphoresis.

Answer: (c) electro osmosis

Question 2.
At CMC (Critical Micellization Cone.) the surface molecules
(a) associate
(b) dissociate
(c) decompose
(d) become completely soluble.

Answer: (a) associate

Question 3.
Milk is an example of
(a) emulsion
(b) suspension
(c) foam
(d) sol.

Answer: (a) emulsion

Question 4.
Tyndall effect is due to
(a) electric charge
(b) scattering of light
(c) absorption of light
(d) none of these.

Answer: (b) scattering of light

Question 5.
Fog is a colloidal system of
(a) liquid dispersed in a gas
(b) gas dispersed in a gas
(c) solid dispersed in gas
(d) solid dispersed in liquid

Answer: (a) liquid dispersed in a gas

Question 6.
Blood may be purified by
(a) coagulation
(b) dialysis
(c) electro-osmosis
(d) filtration

Answer: (b) dialysis

Question 7.
Blue color of water in sea is due to
(a) refraction of blue light by impurities in sea water
(b) scattering of light by water
(c) refraction of blue sky by water
(d) None of these

Answer: (a) refraction of blue light by impurities in sea water

Question 8.
The cause of Brownian movement is
(a) heat change in liquid state
(b) attractive force between colloidal particles and dispersion medium
(c) bombardment of the colloidal particles by the molecules of the dispersion medium
(d) interaction of charged particles

Answer: (c) bombardment of the colloidal particles by the molecules of the dispersion medium

Question 9.
Emulsifying agent present in milk that makes it stable is
(a) maltose
(b) casein
(c) lactose
(d) none of these

Answer: (b) casein

Question 10.
Cloud is an example of
(a) liquid dispersed in gas
(b) solid dispersed in gas
(c) solid dispersed in liquid
(d) none of these

Answer: (a) liquid dispersed in gas

Question 11.
The color of sky is due to
(a) absorption of light
(b) transmission of light
(c) scattering of light
(d) all of these

Answer: (c) scattering of light

Question 12.
Which of the following is lyophobic colloid?
(a) Starch in water
(b) Gum in water
(c) Soap in water
(d) Gold sol

Answer: (d) Gold sol

Question 13.
At high concentration of soap in water, soap behaves as
(a) molecular colloid
(b) associated colloid
(c) macro molecular colloid
(d) lyophilic colloid

Answer: (b) associated colloid

Question 14.
The efficiency of a protective colloid is described in terms of
(a) gold number
(b) flocculation number
(c) valence of counter ion
(d) Tyndall effect.

Answer: (a) gold number

Question 15.
The function of enzymes in the living system is to
(a) maintain pH
(b) catalyze biochemical process
(c) provide immunity
(d) transport oxygen

Answer: (b) catalyze biochemical process

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