Question

why hydrogen cannot oxidise copper​

Answer 1

Ello ✌️

A positive reduction potential tells us that the copper ion is easier to reduce(is a better oxidizing agent) than is the hydrogen ion; this also tells us that copper metal is a worse reducing agent than is hydrogen gas.

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Answer 2

Answer:

Bcoz in reactivity series copper comes down of H , hence it's less reactive than H , therefore H cannot replace it.