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Q. No.
An ideal solution exhibits which of the following properties?

1. \(\Delta \mathrm{H}_{\operatorname{mix}}=0\)
2. It follows Raoult's law.
3. \(\Delta \mathrm{V}_{\operatorname{mix}}=0\)
4. All of the above
Subtopic:  Raoult's Law |
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Level 1: 80%+
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Which of the following pairs will form an ideal solution? 

1. Chloroform and Acetone 

2. Ethanol and Acetone 

3. n-Hexane and n-Heptane 

4. Phenol and Aniline 

Subtopic:  Raoult's Law |
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Two volatile liquids A and B are mixed in the molar ratio 1 : 2. The vapour pressures of pure A and B are 300 mm Hg and 600 mm Hg, respectively. Assuming the solution behaves ideally, the total vapour pressure (in mm Hg) of the solution is:

1. 500
2. 400
3. 200
4. 350
Subtopic:  Raoult's Law |
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An ideal solution is prepared by mixing 2 moles of benzene (vapour pressure = 266 mm Hg) with 3 moles of another liquid (vapour pressure = 236 mm Hg). The total vapour pressure of the solution at the same temperature is:
1. 502 mm 2. 248 mm
3. 600 mm 4. 298 mm 
Subtopic:  Raoult's Law |
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Which of the following is correct for an ideal solution ?

1. A – B attraction force is greater than A – A and B – B.
2. A – B attraction force is less than A – A and B – B.
3. Attraction force remains the same in A – A and B – B.
4. The volume of the solution is different from the sum of the volume of the solute and solvent.
Subtopic:  Raoult's Law |
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Level 1: 80%+
AIPMT - 2002
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Which of the following is true for a dilute solution, regarding raoult’s law:
1. The lowering of vapour pressure is equal to the mole fraction of the solute.
2. The relative lowering of vapour pressure is equal to the mole fraction of the solute.
3. The relative lowering of vapour pressure is proportional to the amount of solute in solution.
4. The vapour pressure of the solution is equal to the mole fraction of the solvent.
Subtopic:  Raoult's Law |
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Level 2: 60%+
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Which one of the following is incorrect for an ideal solution?

1. ∆Hmix = 0

2. ∆Umix = 0

3. \(\Delta \mathrm{P}=\mathrm{P}_{\text {observed }}-\mathrm{P} _\text { Calculated by raoults law }=0\)

4. ∆Gmix = 0

Subtopic:  Raoult's Law |
 82%
Level 1: 80%+
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A mixture contains 1 mole of volatile liquid A \(\left(\right. P_{A}^{\circ} = 100\  mm\ Hg \left.\right)\) and 3 moles of volatile liquid B \(\left(\right. P_{B}^{0} = 80\   mm\   Hg \left.\right)\). If solution behaves ideally, the total vapour pressure of the distillate is:
1. 85 mm Hg
2. 95 mm Hg
3. 90 mm Hg
4. 92 mm Hg

Subtopic:  Raoult's Law |
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Level 1: 80%+
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On the basis of the information given below, mark the correct option.

i. In a bromoethane and chloroethane mixture, intermolecular interactions of A—A and B—B type are nearly the same as A—B type interactions.
ii. In an ethanol and acetone mixture, A—A or B—B type intermolecular interactions are stronger than A—B type interactions.
iii. In a chloroform and acetone mixture, A—A or B—B type intermolecular interactions are weaker than A—B type interactions.

1.  Solutions (ii) and (iii) will follow Raoult’s law

2.  Solution (i) will follow Raoult’s law

3.  Solution (ii) will show negative deviation from Raoult’s law

4.  Solution (iii) will show positive deviation from Raoult’s law

Subtopic:  Azeotrope | Raoult's Law |
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Level 1: 80%+
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Negative deviation from Raoult's law is shown by-

1. Bromoethane and chloroethane
2. Ethanol and acetone
3. Chloroform and acetone
4. Benzene and toluene
Subtopic:  Azeotrope | Raoult's Law |
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