Causes of Water Pollution

Q. Seawater is not used for drinking purposes because:

1. it is salty
2. it is poisonous
3. it is not good for health
4. it supports aquatic life

Q.

How the industries can contribute in preventing water pollution?

1. Treating polluted water in the factory before dumping

2. Adding chemicals to water to make it transparent

3. Adding in the water

4. Adding in the water

Q. Sea water is suitable for drinking and cooking.

1. True
2. false

Q.

Wastewater generated by industries is called _____________.

Q.

Sewage is mainly a

1. liquid waste

2. solid waste

3. gaseous waste

4. the mixture of solid and gas

Q.

How does water gets polluted?

1. Due to the dumping of sewage into rivers or lakes

2. Due to the dumping of wastes from factories into rivers or lakes

3. Due to oil spills in the oceans.

4. Due to pesticides and fertilizers that are added to our crops are washed into water bodies

Q.

We use _________ to increase the yield of a crop. (pesticides/ fertilisers)

Q.

What is potassium immobilization?

Q.

Which type of pollution is shown in the image?

1. Water pollution
2. Noise pollution
3. Air pollution
4. Soil pollution

Q.

Write the name of chemicals which help in increasing food production.

Q. Which of the following activities do not make the river dirty?

1. Washing clothes
2. Bathing animals
3. Cleaning utensils
4. Watering plants

Q.

What is the contribution of chemistry in the following field?

Food and agriculture.

Q. Give short answers :​
Name the chemicals which help in increasing food production.

Q. What is chlorination in wastewater treatment?

Q.

Water treatment plant is a must for industries generating wastewater.

1. True

2. False

Q.

Bordaux mixture is used to kill insects to protect crops.

1. True
2. False

Q.

list any two human activities which would lead to increase the level of pollution of water bodies .write four harmful effects of water pollution

Q.

Two fishes had their home in the River Ganges. One day they were separated as they got flown away from home because of some natural calamity. Which type of natural calamity do you think is this?

1. Cyclone

2. Drought

3. Flood

4. Earthquake

Q.

Two fishes had their home in the River Ganges. One day they were separated and lost as they got flown away from home because of some destruction. Which type of destruction could have taken place?

1. Drought

2. Flood

3. Earthquake

4. Cyclone

Q.

Water pollution can be classified as ___ .

1. Both Biological and Chemical

2. Chemical

3. Biological

4. Neither Biological nor Chemical

Q. Garbage pollutes water bodies and is harmful for the aquatic life.

1. False
2. True

Q. list 3 human activities leads to pollution of waterbodies