Which of the following pairs of substanc...

Which of the following pairs of substance on reaction will evolve `H_2` gas ?

A

Iron and dilute `H_2SO_4`

B

Copper and dilute `HCl`

C

Sodium and ethyl alcohol

D

Iron and steam

Verified by Experts

The correct Answer is:

A, C, D

Copper has highest reduction potential than `H_2` so it does not release Hydrogen from HCl

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