Composition of Air

What is the percentage composition of nitrogen in air?

• 78%

• 75%

• 86%

The composition of air consists of __________ key components.

• seven

• three

• ten

__________________ is the most important gas in the composition of air.

• Nitrogen

• Argon

• Oxygen

______________ is a combustible gas.

• Nitrogen

• Oxygen

• Argon

_______________ is one of the most abundantly found gases on earth.

• Oxygen

• Carbon dioxide

• Nitrogen

________________ balances out oxygen in the atmosphere.

• Carbon dioxide

• Nitrogen

• Argon

___________________ is used to make fire extinguishers.

• Nitrogen

• Silicon

• Oxygen

The presence of Argon in the air was first suspected by in ________________.

• 1615

• 1785

• 1982

The presence of Argon in the air was first suspected by _______________.

• John Boyle

• Archimedes

• Henry Cavendish

_______________ is an asphyxiant .

• Oxygen

• Argon

• Nitrogen