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प्रश्न
Give reasons to support the fact that air is a mixture.
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उत्तर
Air is a mixture can be supported by the following evidence.
- Variable composition at different places
- Lacks distinct properties of its own
- Has no definite boiling point
- Components of air cannot be easily separated by physical means.
- Formation of air does not involve any energy change.
- Cannot be represented by a chemical formula.
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संबंधित प्रश्न
Give one use for the following inert gase :
helium
Give one use for the following inert gase :
radon
State one method by which :
- Oxygen is added to air
- Carbon dioxide is added to air
- Oxygen is removed from the air
- Carbon dioxide is removed from the air
Name the products formed when a candle burns in air.
Explain natural and human-made sources of air pollution.
Why is air called a mixture? Give five facts in support of your answer.
State its role in warming the earth’s environment and in excess resulting in global warming.
State the utility of –
(a) Water vapour
(b) Rare or inert gases present in the air.
Give the environment effect of three polluting gases with a reason why nitrogen is not considered a polluting gas.
Marked temperature changes in the aquatic environment can affect
