Air and its Components
Important Questions on Air and its Components
Which of the following is not a common component of air that we normally breathe in?
Give two examples of major components of air.
Give two examples of a source of water vapour in the air.
Statement I: Carbon dioxide is used in fire extinguishers.
Statement II: Carbon dioxide supports combustion.
Statement I: Air is a mixture of gases.
Statement II: The composition of the air remains the same at different places.
Breathing in air containing smoke damages our health.
Water vapour condenses to form clouds.
The composition of air is always the same at every place.
About one-fifth of ordinary air is:
The two gases which, taken together, make up about percent of the air are:
a. Nitrogen b. Carbon dioxide c. Ozone d. Oxygen
Nitrogen is needed by the plants to make
Oxygen is the major component of air.
Why do plants need nitrogen?
What is the smoke? How is the smoke produced? Explain why tall chimneys are installed in factories.
Why do deep-sea divers carry oxygen cylinders with them?
Name the component of air which condenses on a cold surface to form drops of a liquid. What is this liquid?
