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The stability of dihalides of $\mathrm{Si}, \mathrm{Ge}, \mathrm{Sn}$ and $\mathrm{Pb}$ increases steadily in the sequence
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Verified Answer
The correct answer is:
$\mathrm{SiX}_2 \ll \mathrm{GeX}_2 \ll \mathrm{SnX}_2 \ll \mathrm{PbX}_2$
$\mathrm{SiX}_2 \ll \mathrm{GeX}_2 \ll \mathrm{SnX}_2 \ll \mathrm{PbX}_2$
Due to inert pair effect, the stability of $+2$ oxidation state increases as we move down this group.
$\therefore \mathrm{SiX}_2 \ll \mathrm{GeX}_2 \ll \mathrm{SnX}{ }_2 \ll \mathrm{PbX}_2$
Hence, (C) is correct.
$\therefore \mathrm{SiX}_2 \ll \mathrm{GeX}_2 \ll \mathrm{SnX}{ }_2 \ll \mathrm{PbX}_2$
Hence, (C) is correct.
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