Question

Which of the following will be able to react with dilute HCl to give hydrogen gas ?

• A. Cu
• B. Mg
• C. Hg
• D. Ag

Answer 1

Answer: (B)

Mg

Answer 2

$Mg$ lies above $H_2$ in the activity series $Mg + 2H^+ {->} Mg^{2+} + H_2$ has positive Emf