Q. The statement “the relative lowering of the vapour pressure is equal to th ratio ot moles of the solute to the total number of the moles in the solution” refers to
A) Decrease the freezing point of water in the winter and increase the boiling point of water in the summer
B) Only decrease the freezing point of water
C) Only increase the boiling point of water
D) Be used for cleaning the radiator in a car
Explanation
(a)
When ethylene glycol is added to $H_{2}O$ as antifreeze, it decreases the freezing point of $H_{2}O$ in winter and increase the boiling point of water in the summer.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.