Colligative Properties of Dilute Solutions (a Relative Lowering of Vapour Pressure, Depression of Freezing Point...) NEET Questions

Physical Chemistry - Solutions

Colligative Properties of Dilute Solutions (a Relative Lowering of Vapour Pressure, Depression of Freezing Point...) MCQ Questions


7.
Which of the following equations represents the relative lowering of vapor pressure?
A.
(P° - P) / P° = x_solute
B.
(P - P°) / P° = x_solvent
C.
P / P° = x_solute
D.
P° / P = x_solvent
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ANSWER :
A. (P° - P) / P° = x_solute
8.
Which of the following colligative properties can provide molar mass of proteins (which are unstable at high temperatures)?

NEET - 2016

A.
Relative lowering of vapour pressure
B.
Depression in freezing point
C.
Elevation in boiling point
D.
Osmotic pressure
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ANSWER :
D. Osmotic pressure
9.
The depression in freezing point is directly proportional to:
A.
Molarity of solution
B.
Mole fraction of solute
C.
Molality of solution
D.
Volume of solvent
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ANSWER :
C. Molality of solution
10.
If W grams of a non-volatile solute is dissolved in 100 g of water, the lowering in vapour pressure is proportional to

NEET - 2019

A.
1/W
B.
W
C.
W²
D.
√W
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ANSWER :
B. W
11.
The boiling point of a solution of 0.1 molal NaCl is higher than that of 0.1 molal glucose solution because

NEET - 2022

A.
NaCl has higher molar mass
B.
NaCl undergoes ionization
C.
NaCl forms hydrogen bonds
D.
NaCl is volatile
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ANSWER :
B. NaCl undergoes ionization
12.
Which of the following is the correct equation for boiling point elevation?
A.
ΔTb = Kb × m
B.
ΔTf = Kf × m
C.
ΔTb = Kb × w/m
D.
M × ΔTb = Kb × W
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ANSWER :
A. ΔTb = Kb × m