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

Monjur Alahi

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

(a) PbX2 << SnX2 << GeX2 << SiX2

(b) GeX2 << SiX2 << SnX2 << PbX2

(c) SiX2<< GeX2 << PbX2 << SnX2

(d) SiX2 << GeX2 << SnX2 << PbX2 .


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Salim Ahmed Kawsar

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(c) : 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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Salim Ahmed Kawsar

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Correct option  (B)SiX2 ≤ Gex2 ≤ PbX2 ≤ SnX2 

Explanation:

Due to inert pair effect, stability of +2 oxidation state increases as we move down this groupSiX2 ≤ Gex2 ≤ PbX2 ≤ SnX2 

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