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SAI International School
Subject-Chemistry

Ch-Is Matter around us pure?
Topic-Different types of colloids
HOME ASSIGNMENT

OBJECTIVE QUESTIONS
DIRECTION:Each of these questions contains an Assertion followed by
Reason. Read them carefully and answer the question on the basis of
following options. You have to select the one that best describes the two
statements.
(a) If both Assertion and Reason are correct and Reason is the correct
explanation of Assertion.
(b) If both Assertion and Reason are correct, but Reason is not the correct
explanation of Assertion.
(c) If Assertion is correct but Reason is incorrect.
(d) If Assertion is incorrect but Reason is correct.
(e) If Assertion & Reason both are incorrect.

Q.1 Assertion: Vanishing cream is an emulsion.
Reason: In vanishing cream the dispersed phase is solid and dispersion medium is
liquid.
Q.2 Assertion: Cloud is an aerosol.
Reason: In aerosols the dispersed phase and dispersion medium are liquids.
Q.3 Assertion: Gemstones are called solid sols.
Reason: In solid sols the dispersed phase and dispersion medium both are solids
Q.4 Assertion: Smoke is a sol.
Reason: In sols the dispersed phase is solid and dispersion medium is gas.
Q.5 Assertion: Cheese is a gel.
Reason: It is a colloid of liquid and solid.
Q. 6 Which of the following is a gel?
a) Soap lather.
b) Whipped cream
c) boot polish
d) Pumice stone.
Q.7 In which of the following both the dispersed phase and dispersion medium are
liquids?

a) Sol c) Foam.

b) Gel. d) Emulsion.

Q.8 What is the dispersed phase in gel?

a) solid b) liquid