The stability of dihalides of $S i, G e . S n$ , and $P b$ increases steadily in the sequence :

P b X_{2} < S n X_{2} < G e X_{2} < S i X_{2}

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G e X_{2} < S i X_{2} < S n X_{2} < P b X_{2}

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S i X_{2} < G e X_{2} < P b X_{2} < S n X_{2}

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S i X_{2} < G e X_{2} < S n X_{2} < P b X_{2}

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Solution

The correct option is B $S i X_{2} < G e X_{2} < P b X_{2} < S n X_{2}$
Due to the inert pair effect (the reluctance of $n s^{2}$ electrons of outermost shell to participate in bonding) the stability of $M^{2 +}$ ions (of group IV elements) increases as we go down the group

The stability of dihalides increases down the group:

$S i X_{2} < G e_{2} < P b X_{2} < S n X_{2}$

Hence,option C is correct.

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