Pollution of Air and Water | Chapter Assessment | English | Grade 8

Front

Integrating industrial areas and residential areas is beneficial for both.

Back

FALSE

Answer explanation

Industries release a lot of harmful gases. This is not ideal for a residential area, therefore integrating the two is not a good option.

Front

Which of the following is a natural source of air pollution?

Back

Smoke from Volcanic eruptions

Answer explanation

Smoke released from volcanic eruptions is a natural source of air pollution.

Front

Release of which gas is responsible for acid rain?

Back

Nitrogen dioxide

Answer explanation

Nitrogen dioxide reacts with water to for nitric acid, which makes the rain acidic. This is referred to as acid rain.

Front

Which of the following is not a consequence of global warming?

• Increasing sea level
• Decreasing temperature
• Melting of ice at the poles
• None of the above

Back

Decreasing temperature

Answer explanation

Global warming is the increase of temperature of the globe due to the increase in greenhouse gases in the atmosphere.

Front

Is clear and transparent water fit for drinking?

Back

FALSE

Answer explanation

Clear and transparent water is not necessarily safe. There can be microorganisms in the water than can make you ill.

Front

What is a factor responsible for pollution of rivers?

Back

All of the above

Answer explanation

All these leads to water pollution in the river.

Front

Which method is suitable to clean water to make it fit for drinking? Options: Candle type filter, Boiling, Chlorination, All of the above

Back

All of the above

Answer explanation

All these methods can be used to clean water to make it fit for drinking.