Q. Hydrogen gas is not evolved by the action of cold , dilute HCl on

A
Zn
B
Cu
C
Fe
D
Mn
Solution:

Acids react with most metals to form a salt and hydrogen gas. For example, zinc metal reacts with hydrochloric acid, producing zinc chloride and hydrogen gas.

Copper does not react with non-oxidising acids like hydrochloric acid or dilute sulfuric acid.

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