General Science 7th Class Chapter 7 Solutions Solved Exercise

General Science

7th Class

Chapter 7

Solutions

Questions

7.1 Encircle the correct option.

1. Which of the following is insoluble in water?

a. sodium chloride        b. oil        c. table salt        d. baking powder

2. A solution to which no more solute can be dissolved at a particular temperature is called:

a. dilute solution        b. concentrated solution

c. saturated solution        d. unsaturated solution

3. A concentrated solution can dissolve in it:

a. no further amount of solute

b. less quantity of solute

c. large quantity of solute

d. amount of solute equal to the amount of solvent

4. Amount of solute required to saturate 100g of solvent at a particular temperature is called:

a. molarity        b. molality        c. normality        d. solubility

5. A solution having relatively less amount of solute dissolved in it is called:

a. dilute solution        b. binary solution

c. concentrated solution        d. saturated solution

7.2 Define the followings:

1. Binary solution

2. Aqueous solution

3. Solute

4. Homogeneous mixture

5. Unsaturated solution

1. Binary solution

Ans.

A solution which is prepared at by mixing only two substances, is called binary solution.

2. Aqueous solution

Ans.

A solution in which water is used as solvent is called aqueous solution.

3. Solute

Ans.

Component of solution present in smaller quantity is called solute.

4. Homogeneous mixture

Ans.

Mixture having same composition in its all parts is called homogenous mixture.

5. Unsaturated solution

Ans.

Solution to which further amount of solute can also be dissolved at a particular temperature is called unsaturated solution.