Elements of Group 13, 14 and 15 — Chemistry STD 11 Science — Question
Maharashtra BoardEnglish MediumSTD 11 ScienceChemistryElements of Group 13, 14 and 152 Marks
Question
give reasons:
$PbCl _4$ is less stable than $PbCl _2$
✓
Answer
i.Pb has electronic configuration $[ Xe ] 4 f ^{14} 5 d^{10} 6 s^2 6 p ^2$.
ii. Due to poor shielding of $6 s^2$ electrons by inner d and f electrons, it is difficult to remove $6 s^2$ electrons (inert pair).
iii. Thus, due to inert pair effect, +2 oxidation state is more stable than +4 oxidation state.
Hence, $PbCl _4$ is less stable than $PbCl _2$.
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