Page 1 - Home Assignment-Colloids and their properties

SAI International School
Subject-Chemistry

Ch-Is Matter around us pure?
Topic-Colloids 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: The path of light is visible in milk.
Reason: The particle size in colloids is less than 1nm.
Q.2 Assertion: Light cannot pass soap solution.
Reason: Soap solution is stable.
Q.3 Assertion: The different components of blood cannot be separated by ordinary
filter paper.
Reason: The pore size is bigger in ordinary filter papers.
Q.4 Assertion: Salt solution is stable.
Reason: Salt solution is a true solution
Q.5 Assertion: The path of light from head lamps is visible in dark
Reason: The light from head lamp is a colloid.
Q. 6 Which of the following about blood is incorrect?
a) It can not be separated by filter paper.
b) It is stable
c) It is a true solution
d) The particle size is in between 1 nm to 100 nm.
Q.7 The colloidal particles do not settle at the bottom because:

a) They are too big

b) They are stable.

c) They show Tyndall effect.

d) They can pass through filter paper.

Q.8 Which of the following is not a colloid

a) Starch solution

b) Milk