1.

Which of the following is NOT a disproportiation reaction?

Answer»

`3Cl_(2) + 6OH^(-)(aq) rarr 5Cl^(-)(aq) + ClO_(3)^(-)(aq) + 3H_(2)O(l)`
`2KMnO_(4)(s) underset(("Heat"))overset(Delta)rarr K_(2)MnO_(4)(s) + MnO_(2)(s) + O_(2)(g)`
`3H_(3)PO_(2)(s) underset("(Heat)")overset(Delta)rarr 2H_(3)PO_(3)(s) + PH_(3)(g)`
`P_(4)(s) + 3OH^(-)(aq) + 3H_(2)O(l) overset(Delta)rarr PH_(3)(g) + 3H_(2)PO_(2)^(-1)(aq)`

Solution :(A), (C ) and (D) are disproportiation reactions as these involve both oxidation and REDUCTION of same element. Option (B) is an intramolecular redox reaction.


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