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

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

${SiX}_{2} < {GeX}_{2} < {PbX}_{2} < {SnX}_{2}$
C

${SiX}_{2} < {GeX}_{2} < {SnX}_{2} < {PbX}_{2}$
D

${PbX}_{2} < Sn X_{2} < Ge X_{2} < Si X_{2}$

Solution

Due to inert-pair effect in Group 14, stability of +2 state increases and that of + 4 state decreases as we go down the group. Thus,
${SiCl}_{2} < {GeCl}_{2} < {SnCl}_{2} < {PbCl}_{2}$ Thus, correct.
${SiCl}_{4} > {GeCl}_{4} > {SnCl}_{4} > {PbCl}_{4}$ Thus, correct.

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