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

2211 271 Redox Reactions Report Error

A

Starch

6%

B

Methyl orange

34%

C

Pbenolphthalen

28%

D

$K M n O_{4}$ itself

32%

Solution:

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