Question

For:
$3Cl{O}^{-}\left(aq\right)\to Cl{O}_3^{-}\left(aq\right)+2C{l}^{-}\left(aq\right)$
Identify the type of reaction.

• A. Decomposition reaction
  
• B. Disproportionation reaction
• C.
  Reduction reaction
• D. Oxidation reaction

Answer 1

The correct option is B Disproportionation reaction

A reaction in which a molecule breaks down to form two or more components is called a decomposition reaction.
Example:

$PC{l}_5\left(s\right)\to PC{l}_3\left(s\right)+C{l}_2\left(g\right)$

Disproportionation reaction are those in which same species oxidized and reduced simultaneously.
$3\stackrel{+1}{C}l{O}^{-}\left(aq\right)\to \stackrel{+5}{C}l{O}_3^{-}\left(aq\right)+2\stackrel{-1}{C}{l}^{-}\left(aq\right)$
$Cl$ atom is oxidized $(C{l}^{+}\to C{l}^{5+}+4e^{-})$
Also, $Cl$ atom is reduced
$(C{l}^{+}+2e^{-}\to C{l}^{-}).$
Such reactions are called disproportionation reactions.