P-Block Elements Ques 459
Question: Bleaching action of $ SO_2 $ is due to
[CPMT 1971, 79, 86]
Options:
A) Reduction
B) Oxidation
C) Hydrolysis
D) Its acidic nature
Show Answer
Answer:
Correct Answer: A
Solution:
$ \underset{\begin{smallmatrix} \text{ Violet} \\ \text{ }\text{vapour } \end{smallmatrix}}{\mathop{H_2SO_4+2HI\to 2H_2O+I_2+SO_2}}\uparrow $ (nascent hydrogen) Coloured flower $ +2[H]\to $ Colourless flower
