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


13.
A minimum boiling azeotrope is formed when:
A.
There is no deviation from Raoult’s law
B.
There is positive deviation from Raoult’s law
C.
There is negative deviation from Raoult’s law
D.
Only in ionic solutions
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ANSWER :
B. There is positive deviation from Raoult’s law
14.
Which of the following solutions shows a negative deviation from Raoult’s law?
A.
Acetone + Chloroform
B.
Ethanol + Water
C.
Acetone + Carbon Tetrachloride
D.
Benzene + Toluene
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ANSWER :
A. Acetone + Chloroform
15.
Which of the following correctly represents the vapor pressure composition curve for a non-ideal solution with positive deviation?
A.
Linear graph
B.
S-shaped curve
C.
Parabolic curve
D.
Horizontal line
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ANSWER :
B. S-shaped curve
16.
Which of the following conditions favors an ideal solution?
A.
Strong interactions between components
B.
No significant volume change
C.
Intermolecular forces weaker than pure components
D.
High temperature
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ANSWER :
B. No significant volume change
17.
What type of intermolecular forces are dominant in a solution showing negative deviation?
A.
Stronger than pure components
B.
Weaker than pure components
C.
Same as pure components
D.
No forces at all
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ANSWER :
A. Stronger than pure components
18.
In a solution showing positive deviation from Raoult’s law, the total vapor pressure is:
A.
Less than expected
B.
Greater than expected
C.
Equal to Raoult’s law
D.
Zero
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ANSWER :
B. Greater than expected