1.

The acid not suitable for the preparation of H_(2) by action with metals is

Answer»

HCl
`CH_(3)COOH`
`HNO_(3)`
`H_(2)SO_(4)`.

SOLUTION :`HNO_(3)` cannot be USED, in general, for the preparation of `H_(2)`. This is because it is a strong OXIDISING agent.


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