Pollution

Which of the following gases are called Greenhouse gases?

• Methane

• Nitrogen

• Carbon dioxide

• Both a and c

What is noise?

• Desirable sound

• Desirable and unwanted sound

• Undesirable and unwanted sound

• Undesirable and wanted sound

All sound is noise.

• True

• False

The sound level which is comfortable for the human ear.

• 80-85 decibels

• 120-125 decibels

• 60-65 decibels

• 100-105 decibels

Smog is an example of ______________ pollution.

• land

• water

• air

• noise

Which answer is a MAJOR health effect caused by Noise Pollution?

• Hearing lose

• Hypertension

• Fatigue

• High levels of blood pressure

……………… leads to Global warming

• Carbon monoxide

• Carbon-dioxide

• Sulphur

• Carborundum

What is the total percentage of nitrogen gas in the air?

• 87 per cent

• 78 per cent

• 21 per cent

• 12 per cent

The Taj Mahal is being affected by

• Noise pollution

• Air pollution

• Water pollution

• None of these

Air pollution causes

• Global warming

• Respiratory problems

• Soil erosion

• None of these