Question

answer these question

Answer 1

The above chemical reaction is as follows:

    NaOH + Zn = Na2ZnO2 + H2

The gas evolved is hydrogen gas. When bubbles of this gas is shown near a burning matchstick, the gas will burn with a pop sound.

Hydrogen gas will be again evolved when the same metal reacts with dilute solution of a strong acid such as HCl.

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