Multiple choice

Which of the following facts justifies the given characteristics of air? “The components retain their original properties”

  1. Amount of water vapours in air is higher in monsoon than that in the summer.

  2. Oxygen elements support burning. Oxygen present in the air supports burning too.

  3. There is no release or absorption of energy if a sample of air is prepared.

  4. Nitrogen and oxygen can be separated by boiling and condensing the liquid air.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

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