Air around us

Which gas is helpful for burning fire ?

• oxygen .

• Nitrogen

• carbon dioxide

• all

The layer of gases around the earth is called as

• Oxygen layer

• Ozone layer

• Atmosphere layer

• Simple layer

• All gases

Which of the following is an air pollutant?

• Carbon monooxide

• Nitrogen

• Carbon dioxide

• Oxygen

Organism living in soil breathe through ______________.

• carbon dioxide in soil

• dissolved oxygen in soil

• Air present in soil

• there is no air in soil

which of the following genrates electricity through air

• water mill

• wind mill

• thread mill

• air mill

To release some of the air from the bottle shown in the given diagram, we should:

• tilt the bottle

• push the bottle

• both of them are correct

……………….. is a device which measures the air pressure.

• Thermometer

• Barometer

• Anemometer

• Ammeter

The Nitrogen Content in Air is........

• 88%

• 77%

• 21%

• 78%

• 78.8%

Which of the following is not a property of Air?

• Air is highly compressible

• Air exerts pressure

• Air is not matter because it cannot be seen

• Air is a mixture of gasses

The component of air that supports burning is......

• Oxygen

• Nitrogen

• Carbon Dioxide

• Water Vapour