Arun Syamal Solutions for Chapter: Test Paper 2, Exercise 1: Test Paper 2

Which technique will you use for separating the components of blue ink?

Give one example of each of the following:
a) a solution of a gas in liquid.
b) a solution of two gases.
c) a solution of two liquids.
d) a solution of two solids.

How will you differentiate between a suspension and a colloid? Give one example of each.

Name the technique to separate             

a. butter from curd                

b. salt from sea water                 

c. camphor from salt.

While determining the boiling point of water in the laboratory, the beaker containing hot water accidentally fell on the hand of a student. A fellow student immediately put cold water on his hand and then placed ice cubes on his hand. He then took the student to the school dispensary for giving him first aid.
a. Define boiling point.
b. Why does temperature remain constant during boiling?
c. How does boiling differ from evaporation?
d. State the values displayed by the fellow student.
 

List the points of differences between homogeneous and heterogeneous mixtures.

Explain the following giving examples:
a. saturated solution
b. pure substance
c. colloid
d. suspension.

Describe the steps involved in the purification of drinking water for city water supply.