Which of the following will be able to react with dilute HCl to give hydrogen gas?
A. Cu
B. Mg
C. Hg
D. `Ag`.

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1 Answers

Correct Answer - B
Mg lies above `H_(2)` in the activity series
`Mg+2H^(+)rarrMg^(2+)+H_(2)` has positive Emf.

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