Help with chemistry pleas

if you could answer any or all that would be great!

1. which of the following results form the pressure of a solution in a given solvent
a. the vapor pressure of the solution is higher then that of the pure solvent
b. the boiling point of the solution is lower then that of the pure solvent
c. the freezing point of the solution is lower then that of the pure solvent
d. all of the above

2. a unsaturated solution...
a. is able to dissolve more solute
b.contains the maximum amount of dissolved solute
c. contains excess solute
d. is highly unstable

3. if 1 mole of each of the solutes is added to the same amount of water, which solution has the highest boiling point
a. CuCl2
b. C6H12O6
c. Al2(SO4)3
d. Mg(C2H3O2)2
(all the numbers are supposed to be subscripts)

Q1-d
Q2-a
Q3- Elevation in BP is a Colligative property , and depends on the amt of solute dissolved and not on the nature , but since 'All of the above' option is not there , therefore the answer 'should' be c .

Best of Luck !!!!