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119
*2.
*3.
*4.
The two solutions with same osmotic pressure are called .......
a) Isotonic
b) Isomeric
c) Hypotonic
d) Hypertonic
The values of gas constant and solution constant .......
a) Are different
b) Almost identical
c) Gas constant is greater than solution constant
d) Gas constant is smaller than solution constant
Which of the following 0.1M aqueous solutions will exert highest osmotic pressure?
c) MgSO4
d) Al2(SO4)3
a) NaCl
b) BaCl2
*5.
Abnormal molar mass is produced by .......
a) Association of solute
b) Dissociation of solute
c) Both association and dissociation of solute
d) Separation by semipermeable membrane
*6.
Which of the following aqueous solutions will have minimum elevation in boiling point?
a) 0.1M KCl
b) 0.05M NaCl c) 1M AlPO4
d) 0.1M MgSO4
*7.
Which of the following will have maximum depression in freezing point? (MHT-CET 2009)
b) 1M KCl
c) 0.5M Al2(SO4)3 d) 0.5M BaCl2
a) 0.5M Li2SO4
•
8.
Ans.
Numerical MCQs :
A solution has an osmotic pressure of 0.821 10.
atm at 300K. Its concentration would be
.......
a) 0.66M
b) 0.32M
c) 0.066M
d) 0.033M
π
= CRT
Ans.
0.821 = C × 0.0821 × 300
1
=
0.033M
30
1 molar solution of a non-electrolyte
compound will produce an osmotic pressure
.......
a) 1 atm
b) 44.8 atm
c) 10.0 atm
d) 22.4 atm
π = CRT
= 1 × 0.0821 × 273
= 22.4 atm
C
9.
Ans.
=
The weight of glucose to be dissolved in
250cm3 of water, to get a solution which is
isotonic with 0.2M solution of urea, is .......
a) 36g
b) 9g
c) 18g
d) 4.5g
πglucose = πurea Cglucose = Curea
n glucose
= 0.2
V
mass of glucose
∴
11.
= 0.2
180 × 250 × 10 –3
Mass of glucose = 0.2 × 180 × 250 × 10–3
= 9g
The Vant Hoff factor for non-electrolytes
like, urea, glucose etc. will be .......
a) 2
b) 0.5
c) 1.0
d) –1
Chapter - 2 Solutions and Colligative Properties
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