Among the following which elements have its lower oxidation state more stable than their higher oxidation state?

P b

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S n

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T l

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S b

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Solution

The correct options are
A $P b$
B $S n$
C $T l$
In group 13, the characteristic group oxidation state of $+ 3$ is known but the $+ 1$ state gets progressively stabilized on going down the group. It is particularly favored by $T l$ . This is a consequence of the so called 'inert pair effect' which also accounts for the stability of the dipositive oxidation states of $S n$ and $P b$ and tripositive state of $B i$ .

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Similar questions

In which of the following elements +1 oxidation state is more stable than +3 oxidation state?

Q. Assertion :

T l C l_{3}

is more stable than

T l C l

Reason:

+ 1

oxidation state of

T l

is more stable than

+ 3

Q. Among the following pairs of ions, which pair has a lower oxidation state in aqueous solution more stable than the other?

Read the following and select one the correct answer.

Statement I: $P b^{4 +}$ compounds are stronger oxidizing agents than $S n^{2 +}$ compounds

Statement II: The higher oxidation states for the group 14 elements are more stable for the heavier members of the group due to inert pair effect.

Q. Statement I

P b^{4 +}

compounds are stronger oxidising agents than

S n^{4 +}

compounds.
Statement II The higher oxidation states for the group 14 elements are more stable for the heavier members of the group due to 'inert pair effect'.(J2008,3M)

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