Question

Molecular solids are composed of various substances. Which of the following categories does NOT contain at least one example of a molecular solid substance at room temperature?

• A. Diatomic elements.
• B. Monoatomic elements.
• C. Non-metals bonded to other non-metals.
• D. Polyatomic elements.

Answer 1

The correct option is C Non-metals bonded to other non-metals.

$\begin{array}{c}\text{Molecular solids are those in which main cause of solid producing}\\ \text{state is the attraction due to some weak intermolecular forces}\\ \text{such as Hydrogen bonding, vander waal's forces etc.}\\ \text{These type of forces are predominantly found in many monoatomic}\\ \text{diatomic as well as polyatomic elements.}\end{array}$

$\begin{array}{c}\text{But for the species, in which non-metal is bouded to non-metal,}\\ \text{like}\mathrm{SiC}\text{, they may not be molecular solid but strong}\\ \text{covalent or network solid.}\\ \text{So, option}C\text{is correct.}\end{array}$