pWhich of the following reactions are disproportionation reaction?/pp(a) \( 2 \mathrm{Cu}^{+} \r...
pWhich of the following reactions are disproportionation reaction?/pp(a) \( 2 \mathrm{Cu}^{+} \rightarrow \mathrm{Cu}^{2+}+\mathrm{Cu}^{0} \)/pp(b) \( 3 \mathrm{MnO}_{4}^{2-}+4 \mathrm{H}^{+} \rightarrow 2 \mathrm{MnO}_{4}^{-}+\mathrm{MnO}_{2}+2 \mathrm{H}_{2} \mathrm{O} \)/pp(c) \( 2 \mathrm{KMnO}_{4} \stackrel{\Delta}{\longrightarrow} \mathrm{K}_{2} \mathrm{MnO}_{4}+\mathrm{MnO}_{2}+\mathrm{O}_{2} \)/pp(d) \( 2 \mathrm{MnO}_{4}^{-}+3 \mathrm{Mn}^{2+}+2 \mathrm{H}_{2} \mathrm{O} \rightarrow 5 \mathrm{MnO}_{2}+4 \mathrm{H}^{\oplus} \)/ppSelect the correct option from the following :-/pp(1) (a) and (b) only/pp(2) (a), (b) and (c)/pp(3) (a), (c) and (d)/pp(4) (a) and (d) only/p
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