Vapour Pressure - Composition, Plots for Ideal and Non-Ideal Solutions NEET Questions

Physical Chemistry - Solutions

Vapour Pressure - Composition, Plots for Ideal and Non-Ideal Solutions MCQ Questions


1.
According to Raoult’s law, the partial vapor pressure of a component in an ideal solution is directly proportional to:
A.
Mole fraction of the component
B.
Total pressure
C.
Temperature
D.
Boiling point
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ANSWER :
A. Mole fraction of the component
2.

In an ideal solution, the total vapor pressure is given by:

A.

PA + PB

B.

PA * PB

C.

P°A xA + P°B xB

D.

P°A + P°B

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ANSWER :

C. P°A xA + P°B xB

3.
Which of the following mixtures is expected to show ideal behavior?
A.
Ethanol + Water
B.
Benzene + Toluene
C.
Acetone + Chloroform
D.
HCl + H₂O
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ANSWER :
B. Benzene + Toluene
4.
A solution exhibiting positive deviation from Raoult’s law will have vapor pressure:
A.
Lower than expected
B.
Higher than expected
C.
Equal to pure components
D.
Zero
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ANSWER :
B. Higher than expected
5.
A solution that shows negative deviation from Raoult’s law has:
A.
Higher total vapor pressure than expected
B.
Lower total vapor pressure than expected
C.
Ideal behavior
D.
No intermolecular forces
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ANSWER :
B. Lower total vapor pressure than expected
6.
Which of the following correctly represents the vapor pressure vs. composition curve for an ideal solution?
A.
Linear graph
B.
Parabolic graph
C.
Exponential graph
D.
No graph
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ANSWER :
A. Linear graph