Question

Which of the following acts as a self – indicator?

• A. $K_{2}Cr_{2}O_{7}$
• B. $KMnO_{4}$
• C. Oxalic acid
• D. Iodine

Answer 1

Answer: (B)

$KMnO_{4}$

Answer 2

: $K ⥂ MnO_{4}$ is purple coloured and it changes its colour during titration, hence is a self – indicator.