Question

Match the reactions in column I with their respective characteristics given in column II.

Answer 1

Disproportionation or auto redox is the reaction, where one molecule of a reactant is oxidised and reduced simultaneously.
$C_3{O}_2$ (Fractional oxidation number).
$3x-4=0\Rightarrow x=\frac{4}{3}$
$C{H}_2{Cl}_2$ (Zero oxidation number).
$x+2-2=0;x=0$
Redox reaction:
$({Mn}^{4+}+2e^{-}⟶{Mn}^{2+})$ (Reduction)
$(2{Cl}^{\ominus }⟶{Cl}_2+2e^{-})$ (Oxidation)
Photosynthesis is also a redox reaction occurring in nature.
Hence, the correct match is $A\to 5,A\to 6,B\to 1,C\to 4,D\to 2,E\to 3$.