Water Worksheet-5

Water Worksheet-5

Multiple-Choice Question:

1. _____% of the total fresh water available is underground water.

(A) 40                   (B) 45                   (C) 30                   (D) 35

2. Water is an extremely stable:

(A) Compound   (B) Mixture         (C) Atom              (D) Element

3. ______ % of fresh water is available in the form of lakes, rivers, underground water etc., which can be consumed.

(A) 1                     (B) 0.01                (C) 0.05                (D) 10

4. Which of the following step is not involved in the process of making river water potable?

(A)  Loading                                       (B) Distillation

(C) Chlorination                                (D) Filtration

5. Germs in the water can be killed by:

(A) UV radiations

(B) Adding potassium permanganate crystals

(C) Addition of bleaching powder

(D) Any of these

6. 1 litre potable water contains _____ amount of dissolved salts.

(A) Greater than 5 gram                 (B) 1 -2 gram

(C) Less than 1 gram                       (D) None of these

7. Pond water can be made potable by:

(A) Filtration & boiling

(B) Distillation & chlorination

(C) Addition of potassium permanganate

(D) Addition of bleaching powder

8. Ice has highest latent heat of fusion which is:

(A) 50 cal per gram                         (B) 80 cal per gram

(C) 90 cal per gram                         (D) None of these

9. The latent heat of vaporisation of steam is:

(A) 100 cal per gram                       (B) 540 cal per gram

(C) 400 cal per gram                       (D) None of these

10. On electrolysis of water oxygen gas:

(A) Is deposited at cathode

(B) Is deposited at anode

(C) Is deposited on the walls of electrolytic container

(D) Escapes out

Answer Key:

1. (C)
2. (A)
3. (B)
4. (B)
5. (D)
6. (B)
7. (A)
8. (A)
9. (B)
10. (B)