9. The ratio of the number of moles of solute divided by the total number of moles
gives:
a the mole fraction of the solute
b the molarity of the solution
c the molality of the solution
d the normality of the solution
10. Which of the following liquid pairs shows a positive deviation from Raoult’s law?
a octane, chloroform c benzene, methanol
b ethanol, water d water, nitric acid
11. Which of the following is not a colligative property?
a Osmotic pressure c Boiling point elevation
b Vapour pressure d Freezing point depression
12. The addition of a non-volatile solute to a solvent results in the lowering of:
a boiling point as well as freezing point
b freezing point as well as vapour pressure
c vapour pressure as well as density
d boiling point as well as vapour pressure
13. Phosphoric acid reacts with calcium hydroxide to form calcium hydrogen phosphate
and water. The equivalent mass of phosphoric acid in this reaction will be:
a 98 g/eq c 49 g/eq
b 32.6 g/eq d 14 g/eq
14. A non-volatile electrolyte dissolved in an aqueous solution with the same molal
proportion as a nonelectrolyte produces:
a the same colligative effect
b lower colligative effect
c higher colligative effect�