Question

Boiling point of a substance is based on the intermolecular and intramolecular forces which in turn determine the lattice energy of a substance.
Which of the following substance would have the highest boiling point?

• A. $NaCl$
• B. $Hg$
• C. $Al{F}_3$
• D. $H_{2}O$

Answer 1

Answer: (A)

$NaCl$

$NaCl$ will have the highest boiling point as it is the strongest ionic compound present in the given options. $NaCl$ have strong interionic forces as $N{a}^{+}$ and $C{l}^{-}$ attracts each other very strongly which results in an increase in the compactness of the molecule, further its lattice enthalpy.