JEE CHEMISTRY MCQ: CHEMICAL BONDING & MOLECULAR STRUCTURE

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Which of the following has lowest boiling point?

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Correct option: C

\mathrm{CuC}{\mathrm{l}_2}

Option D (

\mathrm{CuC}{\mathrm{l}_2}

) is correct because, according to Fajan’s rule, smaller cation size and higher charge increase covalent character, lowering the boiling point.

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{BF}_3

{BCl}_3

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{B}-X \pi