Question

Which of the following is a molecule of a compound?

• A. ${\text{O}}_3$
• B. ${\text{N}}_2$
• C. ${\text{P}}_4$
• D. ${\text{SO}}_2$

Answer 1

The correct option is D ${\text{SO}}_2$

A compound is a pure substance that is formed when the atoms of two or more elements combine chemically in definite proportions.​
Among the given molecules, ${\text{O}}_3$, ${\text{P}}_4$, and ${\text{N}}_2$ are examples of molecules of elements.​
Only ${\text{SO}}_2$ has atoms of two different elements (oxygen and sulphur). Hence, ${\text{SO}}_2$ is an example of a molecule of compound.