A. Unlike gases, vapours are liquids at room temperature
B. Unlike gases, vapour can easily be condensed into liquids
C. Unlike gases, vapour is readily converted into solids
D. Vapours are generally denser than gases
Correct answer:
B. Unlike gases, vapour can easily be condensed into liquids
Explanation
Vapour is the equilibrium state between the gases and liquid, and it can bounce back to its original form, liquid with constant temperature and pressure exerted on it.