Question

The melting points of a series of compounds are reported. Which of the options likely represents a molecular species? `A.` `801` `""^@C`; `B.` `1600` `""^@C`; `C.` `1538` `""^@C`; `D.` `0` `""^@C`;

Answer 1

My educated (?) guess would be `D`.

Explanation:

Ionic compounds are non-molecular and tend to possess high melting points, and very high boiling points. Refer to the melting point of say `NaCl`, at `801` `""^@C`.

On the other hand, molecular species are composed of discrete molecules, and the interparticle, i.e intermolecular, interactions tend to be much less in magnitude than those observed for non-molecular species. `A`, `B`, and `C` are contraindicated.