First slide

Group 14 or carbon family

Question

The stability of dihalides of Si, Ge, Sn, and Pb increases steadily in the sequence

Moderate

A

${PbX}_{2} < Sn X_{2} < {GeX}_{2} < Si X_{2}$
B

${GeX}_{2} < {SiX}_{2} < Sn X_{2} < {PbX}_{2}$
C

${SiX}_{2} < {GeX}_{2} < {PbX}_{2} < Sn X_{2}$
D

$Si X_{2} < Ge X_{2} < Sn X_{2} < Pb X_{2}$

Solution

Due to the inert pair effect (the reluctance of ns² electrons of outermost shell to participate in bonding) the stability of M²⁺ions (of group IV elements) increases as we go down the group

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