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Question: Answered & Verified by Expert
Among $\mathrm{LiCl}, \mathrm{BeCl}_2, \mathrm{BCl}_3$ and $\mathrm{CCl}_4$, the covalent bond character follows the order
Chemistrys Block ElementsJIPMERJIPMER 2013
Options:
  • A $\mathrm{LiCl} \lt \mathrm{BeCl}_2 \lt \mathrm{BCl}_3 \lt \mathrm{CCl}_4$
  • B $\mathrm{BCl}_3 \lt \mathrm{CCl}_4 \lt \mathrm{BeCl}_2 \lt \mathrm{LiCl}$
  • C $\mathrm{BeCl}_2 \lt \mathrm{LiCl} \lt \mathrm{CCl}_4 \lt \mathrm{BCl}_3$
  • D $\mathrm{CCl}_4 \lt \mathrm{BCl}_2 \lt \mathrm{BeCl}_2 \lt \mathrm{LiCl}$
Solution:
1518 Upvotes Verified Answer
The correct answer is: $\mathrm{LiCl} \lt \mathrm{BeCl}_2 \lt \mathrm{BCl}_3 \lt \mathrm{CCl}_4$
Covalent character increases with decrease in the value of difference in electronegativites of binding atoms. Thus, the correct order is
$\mathrm{LiCl} \lt \mathrm{BeCl}_2 \lt \mathrm{BCl}_2 \lt \mathrm{CCl}_4$

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