Which of the following cannot be used as...

Which of the following cannot be used as a test for `H_(2)O_(2)`?

A

A paper dipped in PbS (black) turns white when brought in contact with `H_2O_2`

B

It liberates iodine from Kl solution which gives blue coloure with starch solution

C

It gives blue colour with `K_4[Fe(CN)_6]`

D

It decolourises acidified `KMnO_4` solution

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The correct Answer is:

C

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