Air and Air Pollution

The percentage of oxygen in the air is _______.

What is the starting volume of dry air?

• A

• B

• C

• D

• A

• B

• C

• D

• A

• B

• C

• D

• A

• B

• C

• D

• A

• B

• C

• D

Which statements are correct?

• Carbon monoxide is responsible for production of 'acid rain'.

• Oxides of nitrogen are present in car exhausts.

• Sulfur dioxide can be produced by the combustion of fossil fuels.

• A

• B

• C

• D

Which row is NOT correct?

• A

• B

• C

• D

• A

• B

• C

• D