Question

Which of the following shows a metal being oxidised?

• A. $ 2Na+2{{H}_{2}}O\xrightarrow{{}}2NaOH+{{H}_{2}} $
• B. $ Cu\xrightarrow{{}}C{{u}^{2+}}+2{{e}^{-}} $
• C. $ C{{u}^{2+}}+2{{e}^{-}}\xrightarrow{{}}Cu $
• D. Both (a) and (b)

Answer 1

Answer: (D)

Increase in oxidation number is called oxidation while decrease in oxidation number is reduction.
In reactions given in option and , both oxidation number of metal is increasing, hence in both the reactions, metal is being oxidised.