Question

(e) A non-metal that burns in air at room temperature and is thus stored​

Answer 1

Answer:

Phosphorous is a non metal which acts vigorously with Air and hence it is stored in water to avoid its contact with the Air.

Answer 2

Answer:

Potassium is the non metal who auto burn in free state ie; presence of air.

There is only one  non-metal that burns in air at room temperature. It is sodium (Na). Sodium Reacts with the oxygen of the air at room temperature to form Sodium hydroxide.

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