What is the oxidation state of oxygen in $O_2^{2-}$ ion?

  • A
    $+2$
  • B
    $+1$
  • C
    $-2$
  • D
    $-1$

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Carbon is in the lowest oxidation state in

Give the rules for the calculation of oxidation number.

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The oxidation state of each oxygen atom in $Na_{2}O_{2}$ is

Match the following compounds with their respective oxidation numbers of the central atom or specific element:
Compound Oxidation number
$1$. $C_2H_6$ $a$. $+3$
$2$. $H_2O_2$ $b$. $+6$
$3$. $LiAlH_4$ $c$. $-3$
$4$. $HO_2^-$ $d$. $-1$
$5$. $PbSO_4$ $e$. $+1$

In which of the following compounds is the oxidation number of carbon maximum?

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