Answer: Option (C) is the correct answer.
Explanation:
A volatile substance is defined as the substance that readily changes from liquid to gaseous state.
And, it is known that in gases the molecules are held together by weak Vander waal forces. Due to this they have more kinetic energy and they tend to diffuse at a faster rate because of more number of collisions between the molecules.
That is why, its molecules will spread into the atmosphere and we are able to feel the odor of the substance.
Thus, we can conclude that if a substance has an odor, it is volatile.
