Question : The major constituent of air is

Option 1: Nitrogen

Option 2: Carbon dioxide

Option 3: Oxygen

Option 4: Hydrogen

Question : What is the correct percentage by volume of various gases in Earth's atmosphere?

Option 1: 20.95% nitrogen, 78.09% oxygen and 0.04% carbon dioxide and other greenhouse gases

Option 2: 10.95% nitrogen, 88.09% oxygen and 0.09% carbon dioxide and other greenhouse gases

Option 3: 10.95% nitrogen, 78.09% oxygen and 0.03% carbon dioxide and other greenhouse gases

Option 4: 78% nitrogen, 21% oxygen and 0.03% carbon dioxide and other greenhouse gases

Question : Brass gets decolorised in air due to constant exposure in presence of

Option 1: Aluminium phosphate

Option 2: hydrogen sulphide

Option 3: hydrogenated waters

Option 4: Aluminium sulphide

Question : Which gas does not form the part of atmosphere?

Option 1: Nitrogen

Option 2: Hydrogen

Option 3: Chlorine

Option 4: Carbon dioxide

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