Question

Which of the following substance will have the highest boiling point?

• A. $He$
• B. $CsF$
• C. ${SbH}_3$
• D. $CH{Cl}_3$

Answer 1

The correct option is B $CsF$

• Among the various compounds, $CsF$ will have the highest boiling point because it is the strongest ionic compound among all the given options.
• This is because of the strong attractive electrostatic forces holding the oppositely charged ions together and a large number of ionic bonds in the crystal lattice. These require a lot of thermal energy to overcome and hence have both high melting and boiling points.

Hence, option B is correct.