By volume, dry air contains …………………percentage oxygen.

Related MCQs

• By volume, dry air contains …………………percentage nitrogen.
• Highest percentage of air consists of……………………….
• The percentage of carbon dioxide in atmosphere is………………….
• The preamble of the Indian constitution contains:……………………….
• The major source of air pollution is……………………….
• ………….. and sulphur oxides in the air contribute to acid rain.
• Air pollution contributes to …………………….
• The Air (Prevention and Control of Pollution) Act was passed in ………………
• Air pollution causes……………………