MCQ
Oxidation number of carbon in ${H_2}{C_2}{O_4}$ is
  • A
    $+4$
  • $+3$
  • C
    $+2$
  • D
    $-2$

Answer

Correct option: B.
$+3$
(b) $\mathop {{H_2}{C_2}{O_4}}\limits^ * $

$2 + 2x - 2 \times 4 = 0$; $2x = 8 - 2 = 6$

$x = \frac{6}{2} = + 3$.

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