P-Block Elements Ques 455

Question: Which compound acts as an oxidising as well as reducing agent

[IIT 1991]

Options:

A) $ SO_2 $

B) $ MnO_2 $

C) $ Al_2O_3 $

D) $ CrO_3 $

Show Answer

Answer:

Correct Answer: A

Solution:

The minimum and maximum oxidation number of S are `2 and +6 respectively. Since the oxidation number of S in $ SO_2 $ is +4, therefore it can be either increased or decreased. Therefore $ SO_2 $ behaves both as an oxidising as well as reducing agent.



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