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.
