Question

In the following reaction :
$A^{+}+B\to A+B^{+}$.

Name the substance oxidised:

• A. A
• B. B
• C. Both of them
• D. None of them

Answer 1

Answer: (B)

B

Reaction:
$A^{+}+B\to A+B^{+}$
Half reactions are as following:
$A^{+}+e^{-}\to A$

Here, oxidation no. of $A$ is changing from $+1$ to 0.Thus it is reduced.

$B\to B^{+}+e^{-}$

Here, oxidation number of $B$ is changing from 0 to $+1$, hence it is oxidised.