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प्रश्न
State the utility of –
(a) Water vapour
(b) Rare or inert gases present in the air.
टिप्पणी लिखिए
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उत्तर
- For controlling evaporation.
- For determining climatic condition.
- For plant and animal growth.
The are called rare or noble gases because its composition is less than 1% in pure air.
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