Question

Which of the following metals catch fire on reaction with air?​

Answer 1

Answer:

Sodium and potassium both are extremely reactive and react with air as well as water vigorously. The reactions are highly exothermic and hence, the hydrogen gas evolved as byproduct catches fire.

Explanation:

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Answer 2

QUESTION : Which of the following metals catch fire on reaction with air?

Answer: Sodium

Explanation:

Due to quick oxidation, sodium and other alkali metals are highly reactive and may ignite or even explode when exposed to atmospheric oxygen (or, rather, to the moisture) in air.