Air and its Components

IMPORTANT

Air and its Components: Overview

This topic explains the importance of air for all living beings. It discusses the different components of the air, such as oxygen, nitrogen, carbon dioxide, etc. We will also study the uses of various constituents of air.

Important Questions on Air and its Components

MEDIUM
IMPORTANT

Helium is unreactive gas with a high specific heat capacity suggest a possible use of helium based on this information

HARD
IMPORTANT

Read the statements carefully and select the group mentioning incorrect statements:

(i) CO2 is a greenhouse gas.

(ii) Water is a non-polar solvent.

(iii) Major components of air are O2 and CO2.

(iv) The thinnest layer of the atmosphere is the troposphere.

EASY
IMPORTANT

Explain role of water vapour in modifying the earth's climate.

EASY
IMPORTANT

"Although carbon dioxide plays no role in respiration, all life would come to an end if there is no carbon dioxide in air". Support this statement with relevant facts.

EASY
IMPORTANT

What is the percentage proportion of oxygen in air ? Why is oxygen called active air ?

EASY
IMPORTANT

Explain significance of nitrogen for plants and animals.

EASY
IMPORTANT

Give one use of krypton.

MEDIUM
IMPORTANT

The _____ is the lowest layer of the atmosphere.

EASY
IMPORTANT

Xenon is used in Flash lamps and in Stroboscopic lamps.

EASY
IMPORTANT

Give one use of Xenon.

EASY
IMPORTANT

Xenon gas is used in observation ballons.

EASY
IMPORTANT

Xenon is used in

MEDIUM
IMPORTANT

In the presence of _____ and sunlight plants prepare their own food.

MEDIUM
IMPORTANT

Describe photosynthesis.

MEDIUM
IMPORTANT

Carbon dioxide and water combine to form glucose and _____.

EASY
IMPORTANT

The gas released during photosynthesis:

MEDIUM
IMPORTANT

_____ combines with oxygen to form carbon dioxide water and energy.

EASY
IMPORTANT

Respiration is a _____ process.

MEDIUM
IMPORTANT

Phosphorous reacts with sufficient supply of _____ to form phosphorous pent oxide.

MEDIUM
IMPORTANT

Phosphorous pent oxide is formed when phosphorous is reacted in a limited supply of oxygen.