Page 1 - Home Assignment 2.Practice Worksheet

SAI International School
Subject-Chemistry

Ch-Is matter around us pure?
Topic: Tyndall effect and its examples, Suspensions and their
properties, Numericals based on concentration of solutions

Practice Worksheet
MCQs
Q.1 Which of the following may show Tyndall effect?
a) Salt solution
b) muddy water
c) copper sulphate solution
d) solution of cane sugar in water
Q.2 An example of suspension is
a) alum in water.
b) sugar in water.
c) barium sulphate in water.
d) potassium sulphate in water.
Q.3 A solution of alcohol was prepared by dissolving 25mL of alcohol in 375mL of
water. The concentration of the solution in volume-volume percent is:
a) 62.5% (m/m)
b) 6.25% (m/v)
c) 6.25%(v/v)
d) 62.5%(v/m)

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.4. Assertion :When a mixture of sand and water is kept undisturbed for few
minutes a sediment is observed.
Reason :A mixture of sand and water is stable.
Q.5. Assertion :The colour of sun before sun set is red.
Reason :The particles in the sky scatter the red light most.

Q.6 Give any two points of difference between sugar solutions, suspension and jelly?

Q.7 A solution contains 16 g of urea in 120 g of solution. What is mass by mass
percentage of solution