Abnormal Value of Molar Mass NEET Questions

Physical Chemistry - Solutions

Abnormal Value of Molar Mass MCQ Questions


13.
Which of the following compounds will exhibit an abnormal molar mass due to dissociation in water?
A.
NaCl
B.
C₆H₁₂O₆
C.
Urea
D.
None of these
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ANSWER :
A. NaCl
14.
The molecular mass calculated using colligative properties without considering van’t Hoff factor is called:
A.
Observed molar mass
B.
Theoretical molar mass
C.
Abnormal molar mass
D.
Apparent molar mass
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ANSWER :
B. Theoretical molar mass
15.
The depression in freezing point of a solution is lower than expected when the solute:
A.
Associates in solution
B.
Dissociates in solution
C.
Remains as molecules
D.
Has no effect on freezing point
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ANSWER :
A. Associates in solution
16.
Which factor affects the abnormal molar mass of a solute in solution?
A.
Type of solvent
B.
Type of solute
C.
Extent of dissociation/association
D.
All of these
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ANSWER :
D. All of these
17.
Which of the following substances is likely to show an abnormal molar mass?
A.
KCl
B.
NaCl
C.
Urea
D.
Glucose
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ANSWER :
A. KCl
18.
Which equation is used to calculate the extent of dissociation?
A.
i = 1 + (n-1)α
B.
i = α / (1-α)
C.
i = Kb × m
D.
i = ΔTb × m
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ANSWER :
A. i = 1 + (n-1)α