P Block Elements Question 336

Bleaching action of $ SO_2 $ is due to its reducing property

[CPMT 1971, 79, 86]

Options:

A) Reduction in the context of chemical reactions refers to the gain of electrons by a substance, which is the opposite of oxidation.

B) Oxidation is a chemical reaction involving the loss of electrons.

C) Hydrolysis

D) Its acidic nature is due to the presence of hydrogen ions

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



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