Points A and B in the below-mentioned graph represent, respectively:

1. Partial pressures of first and second components
2. Vapour pressures of the pure second and first components
3. Partial pressures of second and first components
4. Vapour pressures of the pure first and second components

Subtopic:  Raoult's Law |
 62%
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Vapour pressure of chloroform (CHCl3) and dichloromethane (CH2Cl2at 298 K are 200 mm Hg and 415 mm Hg respectively. The vapour pressure of the solution prepared by mixing 25.5 g of CHCl3 and 40 g of CH2Cl2 at 298 K is 347.9 mm Hg.

The mole fractions of each component, that is, CHCl
3 and CH2Cl2 in vapour phase are respectively:

0.82; 0.18
2. 0.16; 0.84
3. 0.18; 0.82
4. 0.84; 0.16

 
Subtopic:  Raoult's Law |
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The correct option for the value of vapour pressure of a solution at 45 °C with benzene to octane in a molar ratio 3:2 is:

[At 45 °C vapour pressure of benzene is 280 mm Hg and that of octane is 420 mm Hg. Assume Ideal gas]
1. 336 mm of Hg
2. 350 mm of Hg
3. 160 mm of Hg
4. 168 mm of Hg

Subtopic:  Raoult's Law |
 73%
From NCERT
NEET - 2021
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The correct statement regarding a solution of two components A and B exhibiting positive deviation from ideal behaviour is :

1. Intermolecular attractive force between A-A and B-B are stronger than those between A-B
2. mixH = 0 at constant T and P
3. mixV = 0 at constant T and P
4. Intermolecular attractive forces between A-A and B-B are equal to those between A-B
Subtopic:  Raoult's Law |
 85%
From NCERT
NEET - 2019
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The mixture that shows positive deviation from Raoult's law is-

1. Benzene + Toluene

2. Acetone + Chloroform

3. Chloroethane + Bromoethane

4. Ethanol + Acetone

Subtopic:  Raoult's Law |
 68%
From NCERT
NEET - 2020
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For an ideal solution, the correct option is:

1. mix G=0 at constant T and P

2. mix S=0 at constant T and P

3. mix V0 at constant T and P

4. mix H=0 at constant T and P

Subtopic:  Raoult's Law |
 80%
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NEET - 2019
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For a binary ideal liquid solution, the curve that represents the variation in total vapor pressure versus composition of the solution is:

a.  b.
c. d.

The correct option is:
1. a and b
2. b and c
3. c and d
4. a and d

Subtopic:  Raoult's Law |
 79%
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Select the correct option based on statements below:

Assertion (A): When methyl alcohol is added to water, boiling point of water increases.
Reason (R): When a volatile solute is added to a volatile solvent, elevation in boiling point is observed.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. Both (A) and (R) are False.
Subtopic:  Elevation of Boiling Point | Raoult's Law |
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Vapour pressure of pure water at 298 K is 23.8 mm Hg. 50 g of urea (NH2CONH2) is dissolved in 850 g of water.
The vapour pressure of water (in mm Hg) for this solution is : 
1. 23.40 2. 0.23 
3. 12.87 4. 40.14
Subtopic:  Raoult's Law |
 65%
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On the basis of the information given below mark the correct option.

Information

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

1.  Solution (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 |
 84%
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