Question

C. Choose the correct option.
1. Water is essential for
(a) digestion of food
(b) excretion of waste
(c) germination of seed
(d) all of these
2. Water is used
(a) in agriculture
(b) as a coolant in powerhouses
(c) for recreation and sport activities
(d) all of these
3. The pool of water that is obtained by digging the soil till the impervious layer is called
(a) spring water (b) well water (c) groundwater (d) rain
4. Which of the following substances are insoluble in water?
(a) Sand and salt (b) Sugar and wood (c) Wood and sand (d) Sugar
5. Which of these techniques is the easiest and the most recommended purification tech
(a) Sedimentation and decantation
(b) Filtration
(c) Chlorination
(d) Boiling
6. Which of these is not a cause of water pollution?
(a) Discharge of domestic waste
(b) Addition of chlorine
(c) Leakage of oil during drilling and shipping operations
(d) Discharge of wastes from nuclear plants​

Answer 1

Answer:

1.all of these

2.in agriculture

3.ground water

4.wood and sand

5.Boiling

6.addition of chlorine

Explanation:

please mark this as Brainlisst

Answer 2

Answer:

1d

2d

3d

4d

5d

6d

is the answer.