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Which of the following statement(s) is/are incorrect?
1) Boron shows +1 and +3 oxidation states
2) $S n^{+ 2}$ is more stable than $S n^{+ 4}$
3) $T l^{+ 3}$ is more stable than $T l^{+ 1}$ due to inert pair effect
4) $P b^{+ 4}$ is a stronger oxidising agent than $P b^{+ 2}$

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1,2,3 and 4

1,2 and 3

1,2 and 4

1,3 and 4

answer is B.

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Detailed Solution

$\begin{array}{l} T l^{+ 1} > T l^{+ 3} \\ S n^{+ 4} > S n^{+ 2} \end{array}}$ Stability. Boron shows +3 and (-3)

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