Question

Name the gas that can readily decolourise acidified KMnO₄
solution : [2017]
(a) SO₂ (b) NO₂
(c) P₂O₅ (d) CO₂

Answer 1

Answer:

SO2– decolurises Acidified KMnO4. The pink colour of KMnO4 is (reduced) decolourised by SO2- gas as follows. Even hydrogen sulphide (H2S) reduced and decolourises Acidified KMnO4 as follows.

Answer 2

Answer:

The above mentioned is the answer for this question