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The amount of water vapour present in air is called:
AHeaviness
BHollowness
CHumidity
DHardness
Answer & Solution
Correct answer: C. Humidity
1. Air can hold only so much at a given temperature.
2. High values slow evaporation down.
3. It is humidity.
_Source: NCERT Class 9 Science, Ch 1 'Matter in Our Surroundings'_
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