Question

Which reaction represents auto redox or disproportionation reaction :

(A) $KMnO _{4} \longrightarrow K _{2} MnO _{4}+ MnO _{2}+ O _{2}$

(B) $F _{2}+ NaOH \longrightarrow NaF + OF _{2}+ H _{2} O$

(C) $HCHO + OH ^{-} \longrightarrow CH _{3} OH + HCOO ^{-}$

(D) $\left( NH _{4}\right)_{2} Cr _{2} O _{7} \longrightarrow N _{2}+ Cr _{2} O _{3}+ H _{2} O$

Answer 1

$HCHO + OH ^{-} \longrightarrow CH _{3} OH + HCOO ^{-}$ represents auto redox or disproportionation reaction. So, The correct option of this question is (C).