Question

In the reaction $N{O}_2^{-}+OC{l}^{-}\to N{O}_3^{-}+C{l}^{-},$ the oxidation state of chlorine :

• A. does not change
• B. changes from $+1$ to $-1$
• C. changes from $-2$ to $-1$
• D. changes from $0$ to $-1$

Answer 1

Answer: (B)

changes from $+1$ to $-1$

In $(O^{2-}C{l}^{+}{)}^{-}$, the oxidation state of chlorine is $+1$.
In $C{l}^{-}$, the oxidation state of chlorine is $-1$.
Thus, the oxidation state of chlorine changes from $+1$ to $-1$.