Question : Transboundary pollution ( or ) Acid rain is caused by:

Option 1: Carbon monoxide

Option 2: Carbon dioxide

Option 3: Hydrocarbon

Option 4: Nitrogen oxide and sulphur dioxide

Question : Fire extinguishers emit which gas?

Option 1: Carbon monoxide

Option 2: Chlorine

Option 3: Carbon dioxide

Option 4: Nitrogen

Question : The most serious air pollutant causing health harzard is:

Option 1: Sulphur dioxide

Option 2: Carbon monoxide

Option 3: Ozone

Option 4: Nitrogen oxide

Question : Which of the following gases is most toxic ?

Option 1: Carbon dioxide

Option 2: Carbon monoxide

Option 3: Sulphur dioxide

Option 4: Chlorine

Question : The major constituent of air is

Option 1: Nitrogen

Option 2: Carbon dioxide

Option 3: Oxygen

Option 4: Hydrogen