Which of the following shows a metal being oxidised?

Question

Which of the following shows a metal being oxidised? (A)  2Na+2H2O xrightarrow2NaOH+H2  (B)  Cu xrightarrowCu2++2e-  (C)  Cu2++2e- xrightarrowCu  (D) Both (a) and (b)

Tardigrade Admin · Accepted Answer

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.

Q. Which of the following shows a metal being oxidised?

$2 N a + 2 H_{2} O 2 N a O H + H_{2}$

$C u C u^{2 +} + 2 e^{-}$

$C u^{2 +} + 2 e^{-} C u$

Both (a) and (b)

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.

Q. Which of the following shows a metal being oxidised?

2Na+2H2​O​2NaOH+H2​

Cu​Cu2++2e−

Cu2++2e−​Cu

Both (a) and (b)

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.

$2 N a + 2 H_{2} O 2 N a O H + H_{2}$

$C u C u^{2 +} + 2 e^{-}$

$C u^{2 +} + 2 e^{-} C u$

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.