Abnormal Value of Molar Mass NEET Questions

Physical Chemistry - Solutions

Abnormal Value of Molar Mass MCQ Questions


1.
Which of the following factors leads to an abnormal molar mass?
A.
Association of solute molecules
B.
Dissociation of solute molecules
C.
Both A and B
D.
None of these
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ANSWER :
C. Both A and B
2.
Abnormal molar mass is observed due to deviation in which colligative property?
A.
Boiling point elevation
B.
Freezing point depression
C.
Osmotic pressure
D.
All of these
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ANSWER :
D. All of these
3.
The van’t Hoff factor (i) is used to calculate the correct molar mass. It is given by:
A.
i = Observed molar mass / Normal molar mass
B.
i = Normal molar mass / Observed molar mass
C.
i = ΔTf / Kf
D.
i = ΔTb / Kb
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ANSWER :
B. i = Normal molar mass / Observed molar mass
4.
If a solute undergoes dissociation in a solution, the observed molar mass will be:
A.
More than expected
B.
Less than expected
C.
Equal to expected
D.
None of these
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ANSWER :
B. Less than expected
5.
If a solute undergoes association in a solution, the observed molar mass will be:
A.
More than expected
B.
Less than expected
C.
Equal to expected
D.
None of these
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ANSWER :
A. More than expected
6.
Which of the following will NOT show an abnormal molar mass?
A.
Strong electrolyte
B.
Non-electrolyte
C.
Weak electrolyte
D.
Salt in water
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ANSWER :
B. Non-electrolyte