Foundation Level-I JEE Mock Test-9 (Chemistry)

The atmosphere is__________

• A layer of air

• A layer of clouds

• A layer of Water

• None of these

Air is a/an_________

• Element

• Mixture

• Compound

• None of these

Envelope of air that surrounds the Earth is known as______________

• Biosphere

• Atmosphere

• Environment

• Ecosystem

Air is present in________

• Atmosphere

• Soil

• Water of ponds, lakes and seas

• Everywhere

Major part of the air is constituted by__________

• Nitrogen

• Oxygen

• Carbon dioxide

• Inert gases

The gas which is called green house gas?

• Carbon dioxide

• Oxygen

• Nitrogen

• Argon

Which of the following gas helps in burning?

• Nitrogen

• Oxygen

• Carbon dioxide

• Carbon monoxide

Wind is________

• Air around us

• Rising hot air

• Air in motion

• None of these

The ratio of Nitrogen to oxygen in the air is_______

• 1:4

• 4:1

• 3:1

• 1:2

Air contains__________ oxygen.

• 100%

• 50%

• 25%

• 21%