Page 1 - 4.Home Assignment-Suspensions and their properties

SAI International School
Ch-Is Matter around us pure?

Topic-Suspensions and their properties
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: Muddy water is unstable.
Reason: Particle size in suspensions is large enough to make them settle at the
bottom.
Q.2 Assertion: Starch solution shows Tyndall effect.
Reason: Starch solution is a suspension.
Q.3 Assertion: The path of light can be visible through milk.
Reason: Milk particles are large enough to scatter the light.
Q.4 Assertion: We can separate the components of muddy water.
Reason: Mud particles are large enough to pass through the pores of filter paper.
Q.5 Assertion: We can see through muddy water.
Reason: The particle size in muddy water is >100nm.

Q. 6 The fine particles of ani nsoluble substance uniformly dispersed throughout a
gas or liquid is called
(a) suspension (b)precipitate
(c)colloidalsolution (d)impurity

Q.7 Which of the following upon shaking with water will form a truesolution?
(a) Alum (b) Commonsalt
(c) Albumin (d)Sucrose

Q.8 The size of particles in a suspension is in the range of

a) 1-100nm

b) >100nm

c) <100nm

d) =100 nm