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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