Question

Given reaction $HCHO\to C{H}_{3}OH+HCO{O}^{-}$ is an example of:

• A. intermolecular redox change
• B. intramolecular redox change
• C. disproportionation or auto redox
• D. none of these

Answer 1

Answer: (C)

disproportionation or auto redox

$HCHO\to C{H}_{3}OH+HCO{O}^{-}$

A B C

The above process is disproportionation reaction because A undergoes oxidation and reduction simultaneously and forms B and C.

The oxidation state of Carbon in A is 0

The oxidation state of Carbon in B is -2

The oxidation state of Carbon in C is 3