First slide

Types of redox reactions

Question

Which reaction does not represent auto redox or disproportionation ?

Easy

A

${Cl}_{2} + {OH}^{-} ⟶ {Cl}^{-} + {ClO}_{3}^{-} + H_{2} O$
B

$2 H_{2} O_{2} ⟶ H_{2} O + O_{2}$
C

$2 {Cu}^{+} ⟶ {Cu}^{2 +} + Cu$
D

${({NH}_{4})}_{2} {Cr}_{2} O_{7} ⟶ N_{2} + {Cr}_{2} O_{3} + 4 H_{2} O$

Solution

${({NH}_{4})}_{2} {Cr}_{2} O_{7} ⟶ N_{2} + {Cr}_{2} O_{3} + 4 H_{2} O$ This is not disproportination or Auto redox reaction due to ammonium dichromate on strong heating to give N₂and chromic oxide.

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