Q. Which of the following acts as an indicator in $K M n O_{4}$ titrations?

2135 225 Redox Reactions Report Error

A

Starch

5%

B

Methyl orange

29%

C

Pbenolphthalen

28%

D

$K M n O_{4}$ itself

38%

Solution:

$K M n O_{4}$ is a self-indicator.