Question

Name the gas that can readily decolourise acidified $KMnO_4$ solution :

• A. $SO_2$
• B. $NO_2$
• C. $P_2O_5$
• D. $CO_2$

Answer 1

Answer: (A)

$SO_2$

Answer 2

$SO_2$ is readily decolourises acidified $KMnO_4$