Which one of the following reactions does not involve either oxidation or reduction?

  • A
    $VO_2^+ \to V_2O_3$
  • B
    $Na \to Na^+$
  • C
    $CrO_4^{2-} \to Cr_2O_7^{2-}$
  • D
    $Zn^{2+} \to Zn$

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Similar Questions

Match the Column-$I$ with Column-$II$ for the oxidation states of the central atoms.
Column-$I$ Column-$II$
$A$. $Cr_2O_7^{2-}$ $1$. $+3$
$B$. $MnO_4^{-}$ $2$. $+4$
$C$. $VO_3^{-}$ $3$. $+5$
$D$. $FeF_6^{3-}$ $4$. $+6$
$5$. $+7$

Which of the following is $NOT$ correct for $C_3O_2$?

$3 \ mole$ of $N_2H_4$ loses $30 \ mole$ of electrons to form a new compound. Calculate the oxidation state of $N$ in the new compound,assuming the oxidation state of $H$ remains unchanged.

Difficult
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The oxidation number of carbon in graphite is ....... .

The oxidation state of iodine in $H_4IO_6^-$ is

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