Water Pollutants

Q. Recent study by the WWF(World Wide Fund for Nature) found that is one of the ten most endangered rivers in the world.

1. Yamuna
2. Kaveri
3. Ganga

Q.

Clear and transparent water is always fit for drinking.

1. True

2. False

Q. What does the presence of a green layer over a water body in the image depict?

Q.

Pollutants are responsible for pollution.

1. True

2. False

Q.

A region of a lake is turned into a dead zone. Identify the correct reason.

1. Acid rain

2. Eutrophication

3. Washed off fertilizers in the lake

4. Washed off fertilizers in the lake, acid rain and Eutrophication (all)

Q.

Water pollution can be potentially harmful to aquatic life. What are the ways by which water gets contaminated?

1. Sewage wastes

2. Chlorine water

3. Industrial wastes

4. Both sewage and industrial wastes

Q.

Water can be saved by:

1. Reusing the water used for washing vegetables

2. Reducing use of water by closing taps while brushing

3. Recycling water by storing it in filter unit

4. All of these

Q.

Addition of hot water in the water bodies is considered as water contamination.

1. Only Statement A is true

2. Only Statement B is true

Q. Minimata disease is a pollution-related disease, which is caused due to:

1. Release of human organic waste into drinking water
2. Accumulation of arsenic into atmosphere
3. Oil spills into sea
4. Release of industrial waste containing mercury into water containing fish and other aquatic animals

Q. The figure given below shows a situation of a pond situated near an oil palm estate.


What could be the possible reason for the death of the fish in the pond next to the oil palm estate?

1. The practice of crop rotation in the estate.
2. The use of chemical fertilisers in the estate.
3. The waste products given out by the plants.
4. The use of biological control in the estate.