29
MCQ (Multiple Correct Answer)
Relative lowering of vapour pressure is a colligative property because ......... .
A
it depends on the concentration of a non-electrolyte solute in solution and does not depend on the nature of the solute molecules
B
it depends on number of particles of electrolyte solute in solution and does not depend on the nature of the solute particles
C
it depends on the concentration of a non-electrolyte solute in solution as well as on the nature of the solute molecules
D
it depends on the concentration of an electrolyte or non-electrolyte solute in solution as well as on the nature of solute molecules
30
MCQ (Multiple Correct Answer)
van't Hoff factor (i) is given by the expression
A
$i=\frac{\text { normal molar mass }}{\text { abnormal molar mass }}$
B
$i=\frac{\text { abnormal molar mass }}{\text { normal molar mass }}$
C
$i=\frac{\text { observed colligative property }}{\text { calculated colligative property }}$
D
$i=\frac{\text { calculated colligative property }}{\text { observed colligative property }}$
31
MCQ (Multiple Correct Answer)
Isotonic solutions must have the same ............ .
A
solute
B
density
C
elevation in boiling point
D
depression in freezing point
32
MCQ (Multiple Correct Answer)
Which of the following binary mixtures will have same composition in liquid and vapour phase?
A
Benzene-toluene
B
Water-nitric acid
C
Water-ethanol
D
$n$-hexane- $n$-heptane
33
MCQ (Multiple Correct Answer)
In isotonic solutions ........... .
A
solute and solvent both are same
B
osmotic pressure is same
C
solute and solvent may or may not be same
D
solute is always same solvent may be different