Among ${\rm{NaF,\;}}\,\,{\rm{NaCl,\;}}\,\,{\rm{NaBr\;}}\,\,{\rm{and\;}}\,\,{\rm{NaI,}}$ the NaF has highest melting point because:

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JEE CHEMISTRY MCQ: CHEMICAL BONDING & MOLECULAR STRUCTURE

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Among 

\mathrm{NaF,\;}\,\,\mathrm{NaCl,\;}\,\,\mathrm{NaBr\;}\,\,\mathrm{and\;}\,\,\mathrm{NaI,}

the NaF has highest melting point because:

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Correct option: A

It has maximum ionic character

Option A (It has maximum ionic character) is correct because, according to Fajan's rule, smaller anions have less polarization and therefore higher ionic character and melting point.

JEE CHEMISTRY MCQ: CHEMICAL BONDING & MOLECULAR STRUCTURE

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