Question

amalgamated sodium can be used in place of sodium in the preparing hydrogen​

Answer 1

Explanation:

Reaction of cold water with Na is vigorous, therefore to minimize the rate of reaction sodium amalgam is used in the preparation of hydrogen.

Answer 2

It forms thin oxide layer which renders the metal passive. Hence, it does not react with food stuffs. (b) Reaction of cold water with Na is vigorous, therefore to minimize the rate of reaction sodium amalgam is used in the preparation of hydrogen.