Water Pollution Prevention

Q. Read the paragraph and answer the questions following it. ​

Water is essential for life. Without water, there would be no life. We usually take water for granted for its purity, but we must ensure the quality of water. Pollution of water originates from human activities. Through different paths, pollution reaches groundwater. Easily identified source or place of pollution is called a point source, e.g.– municipal and industrial discharge pipes, where pollutants enter the water source. Non–point sources of pollution are those where a source of pollution can not be easily identified, e.g.– agricultural runoff, acid rain, etc. ​

(i)How do you classify the various sources of water pollution? ​
(ii) What are the point sources of water pollution?
(iii) Name any two non-point sources of water pollution?

Q. Choose the incorrect statement regarding chlorine from the options given below.

1. High exposure to chlorine causes skin irritation.
2. Excess chlorine in water causes eye irritation.
3. Germans used chlorine to purify water.
4. Chlorine prevents the spread of diseases.

Q.

Question 4
Which of the following is not a way to conserve water?
(a) Replace
(b) Reduce
(c) Reuse
(d) Recycle

Q. The Great Pacific Garbage Patch has been created due to extensive water.

1. decontamination
2. pollution
3. purification

Q.

The government project launched to save Ganga from contamination was _____

1. Ganga Recovery Plan, 1990

2. Save holy River, 1985

3. Ganga Action Plan, 1985

4. Save Ganga, 1985

Q.

Which one of the following is not used for disinfection of drinking water?

1. Chlorine

2. Ozone

3. Chloramine

4. Phenyl

Q.

The shipment of waste from country to another country is called:-

1. Fly tipping

2. Illegal dumping

3. Environmental dumping

4. Fly dumping

Q.

Water contamination leads to death of aquatic species because:

1. it lowers the pressure of water

2. it purifies the water

3. it decreases the temperature of water

4. contaminated water contains bacteria

Q. Sewage consists of more than 99% of .

1. waste water
2. solid matter
3. gases

Q.

Which of the following generates most of the sewage?

1. Hospitals

2. Offices

3. Houses

4. Shops

Q. The Ganga action plan aimed ________.

1. to increase the water level of Ganga
2. to increase trade through the Ganga river
3. to build a bridge on Ganga river
4. to reduce the pollution level in the river Ganga

Q.

The factor that contributes most to Ganges pollution is

1. Disposal of untreated sewage and dead bodies

2. Daily fishing activity

3. Wallowing of cattle

4. Washing of clothes

Q.

Identify the foul practices by which we have been damaging the Ganga river.

1. Throwing large quantities of garbage

2. Pushing untreated sewage

3. Cremation of dead bodies

4. Taking bath on the banks

Q. Cleaning of sewage is a process of removing ____ from it.

1. oxygen
2. vitamins
3. pollutants
4. minerals

Q.

One word/statement answer

What are the main objectives of Ganga Action Plan? In which year it was launched and by
whom?

Q. Which of the following is the most common household method for water purification?

1. All of above
2. Chlorination
3. Boiling
4. Coagulation

Q. Water is often treated with chlorine to:

1. kill germs
2. remove suspended particles
3. remove hardness
4. increase oxygen content

Q. Which of the following contributes to water pollution?

1. Industrial effluents into the water bodies
2. Dumping of plastic bags into the water bodies
3. Oil spills in the seas or oceans
4. Excessive growth of aquatic life

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. Which of the following is a reason for water pollution?

1. Dumping of plastics
2. Afforestation
3. Melting of glaciers
4. Drought

Q. What harm can dumping of untreated sewage into a river cause?