Which one of the following item cannot be used to demonstrate the presence of air?

Which abiotic component is present everywhere?

Which of the following is not a property of air?

Why is air considered to be a matter?

Name the device used by mountaineers for breathing at higher altitudes?

What is air in motion called as?

If water is to compound that what air is to?

Air contains ____________.

What is atmosphere?

How many gases does air contain?

Pick out odd one:

Which component in the air contributes towards Humidity?

Which change has been observed in the phase of a matter, when air comes in contact with a cool surface?

Which gas in the atmosphere helps in burning?

During rainy seasons most eatables become moist and tender. what does it indicate?

Which component of air does not support combustion?

Which one of the following gases is an end product of burning?

Which gas plays a major role in global warming?

Which gas is released by the plants during photosynthesis ?

Animals inhale _______ gas; while exhale ________ gas.

Which one of the following gas is present as major constituent of air?

Which one of the following gas is not a constituent of air?

Oxygen is an important component of which process?

If all living beings are related to respiration, then all the green plants are related to _____________.

___________ and _________ are the major components of air?