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प्रश्न
Explain the following observations very briefly
An empty glass in fact is not empty.
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उत्तर
In an empty glass there is always air present which covers up the space therefore, it cannot be said empty. Air is transparent, weightless and doesn’t have a definite shape or volume, thus, we cannot see it.
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संबंधित प्रश्न
A fuel when used releases least amount of pollutants in the air.
Briefly state the importance of Carbon dioxide.
Give reason:
A burning candle stops burning if covered with a glass tumbler
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Name the following:
The component of air which is present more in industrial areas.
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Write the percentage of the gases present in air.

Can you guess why fire extinguishers throw a stream of carbon-di-oxide while putting - off the fire?
What is the presence of harmful substance in the air called?
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