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 : Which of the following gases is most toxic ?

Option 1: Carbon dioxide

Option 2: Carbon monoxide

Option 3: Sulphur dioxide

Option 4: Chlorine

Question : Global warming is mainly due to the accumulation of Which of the following?

Option 1: Oxides of Nitrogen

Option 2: Oxides of Sulphur

Option 3: Carbon Dioxide

Option 4: Carbon monoxide

Question : The major harmful gas emitted by automobile vehicle which causes air pollution is

Option 1: Carbon monoxide

Option 2: Methane

Option 3: Carbon dioxide

Option 4: Ozone gas

Question : What is dry ice?

Option 1: Solid Carbon dioxide

Option 2: Solid Nitrogen dioxide

Option 3: Solid Sulphur dioxide

Option 4: Solid water