Question

Oxidation number of $N$ in ${NH}_3$ is:

• A. $-3$
• B. $+3$
• C. $0$
• D. $+5$

Answer 1

The correct option is A $-3$

$\stackrel{\ast }{N}{H}_3$

$x+3(+1)=0;x=-3$

Option A is correct.