A) oxidizing agent.
B) reducing agent.
C) bleaching agent.
D) All of the above
Correct Answer: D
Solution :
(i) \[S{{O}_{2}}\] acts as an oxidizing agent and oxidizes magnesium to its oxide. (ii)\[S{{O}_{2}}\]reacts with moisture and liberates nascent hydrogen along with sulphurous acid. Nascent hydrogen acts as a powerful reducing agent. (iii) \[S{{O}_{2}}\]reacts with moisture and liberates nascent hydrogen along with sulphurous acid. The nascent hydrogen, so formed bleaches vegetable and animal coloured matter to colourless. \[S{{O}_{2}}\]acts as a bleaching agent by reduction.
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