Water Pollutants

Q.

Which of the following bacteria is found in Ganga water?

1. Coliform bacteria

2. Streptococcus bacteria

3. Staphylococcus bacteria

4. Diplococcus bacteria

Q.

What is biological magnification?

Q.

_______ cause Minamata disease.

Q.

Household detergents are safe and non-contributors to water pollution

1. Excess amount of oil spilling into the water body
2. Excess amount of fertilizers getting drained into water

Q.

What is municipal waste?

Q. Which of the following metals is a water pollutant?

1. As
2. Mn
3. Mg
4. Hg

Q.

What is the term given to the zone where village people leave their waste in a shared open area?

1. Common pit

2. Common dump

3. Open dump

4. Dig point

Q.

The drawback of DDT as a pesticide is:

1. It becomes ineffective only after some time

2. It is less effective than others

3. It is not easily/rapidly degraded in nature

4. Its cost is very high

Q.

___ is the liquid waste produced due to domestic activities.

Q. State whether true or false:
A non-point source of pollution is not hard to trace since it comes from a large area.

1. True
2. False

Q. State whether true or false:
Oil spills are the only source of water pollutants in ocean water.

1. False
2. True