Page 2 - HA

a) Starch solution

b) Milk

c) salt solution

d) soap solution

Home assignment.
Sl.No. Questions Mark Skill
Q.1 Milk is regarded as a colloid because it is transparent (True/False). 1 U/Av
Q.2 Muddy water cannot scatter light because it is a colloid. 1 U/E
(True/False)

Q.3 Write three points of difference between true solutions from 3 A/Av
colloids?

Q.4 a) State one test to distinguish between colloid from a true 3 A/Av
solution?

b) Define the following:

i) Dispersed phase

ii) Dispersion medium

Q.5 a) What is Tyndall effect? Which of the following show Tyndall 5 U/Av
effect and why? Milk, soda water, Starch solution, sulphur solution.

b) State one example of Tyndall effect from your daily life

NCERT Textbook- Std.-IX-Science: Pg. No. 29 : Qu.9