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


7.
A solution exhibiting positive deviation from Raoult’s law forms:
A.
Maximum boiling azeotrope
B.
Minimum boiling azeotrope
C.
Ideal solution
D.
Colloidal solution
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ANSWER :
B. Minimum boiling azeotrope
8.
Which of the following correctly represents the total vapor pressure for an ideal solution?
A.
Decreases linearly with mole fraction
B.
Remains constant
C.
Increases linearly with mole fraction
D.
Shows an S-shaped curve
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ANSWER :
C. Increases linearly with mole fraction
9.
In a non-ideal solution with negative deviation, the intermolecular forces between unlike molecules are:
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
10.

For an ideal solution, what is the relationship between P_total and mole fraction?

A.

Ptotal = xA P°A + xB P°B

B.

Ptotal = xA + xB

C.

Ptotal = PA PB

D.

Ptotal = xA² + xB²

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ANSWER :

A. Ptotal = xA P°A + xB P°B

11.

Which of the following is true for an ideal solution?

A.

ΔHmix ≠ 0

B.

ΔVmix ≠ 0

C.

ΔGmix = 0

D.

ΔHmix = 0

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ANSWER :

D. ΔHmix = 0

12.
Which type of deviation leads to lower vapor pressure than expected?
A.
Positive deviation
B.
Negative deviation
C.
Ideal solution
D.
None of these
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ANSWER :
B. Negative deviation