Question

Which one of the following is not correct for the reaction?
$(CN{)}_2+H_{2}O\to HCN+HOCN$

• A. It is an auto redox change.
• B. Oxidation number of C in $(CN{)}_2,HCN$ and $HOCN$ are +3, +2 and +4 respectively.
• C. Oxidation number of n in $(CN{)}_2,HCN$ and $HOCN$ are +3, +2 and +4 respectively.
• D. The resultant solution is acidic.

Answer 1

Answer: (C)

Oxidation number of n in $(CN{)}_2,HCN$ and $HOCN$ are +3, +2 and +4 respectively.

$(CN{)}_2+H_{2}O\to HCN+HOCN$
$+3$ $+2$ $+4$
So, its a autoredox reaction.
The oxidation number of N in $(CN{)}_2,HCN$ and $HOCN$ are +3, +2 and +4 respectively.