Question

Oxidation number of carbon in $H_2{C}_2{O}_4$ is

• A. 4
• B. 3
• C. 2
• D. -2

Answer 1

The correct option is B 3

$H_2\stackrel{\ast }{C_2}{O}_4$
$2+2x-2\times 4=0;2x=8-2=6$
$x=\frac{6}{2}=+3$.