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The least stable dioxide of group 16 elements is ____?

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$T e O_{2}$

$S e O_{2}$

$P o O_{2}$

$S O_{2}$

answer is B.

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Detailed Solution

Least stable dioxide of group 16 elements is $P o O_{2}$ . Following is the explanation.

Dioxides of this family possess intermediate oxidation states. So they can act as oxidizing agents as well as reducing agents.

Reducing power : $S O_{2} > S e O_{2} > T e O_{2} > P o O_{2}$

Oxidizing power : $S O_{2} < S e O_{2} < T e O_{2} < P o O_{2}$

Since the bonds present in $S O_{2}$ are stronger than $P o O_{2}$ , the later has to be least stable.

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