For an ideal solution, the non-zero value will be for:

1. \(\Delta H_{mix}\)
2. \(\Delta S_{mix}\)
3. \(\Delta V_{mix}\)
4. \(\Delta P=P_{\text{observed}}-P_{\text{Raoult}}\)
Subtopic:  Introduction & Colligative properties |
 84%
From NCERT
NEET - 2015
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The boiling point of 0.2 mol kg-1 solution of X in water is greater than the equimolal solution of Y in water. The correct statement in this case is:

1. X is undergoing dissociation in water.
2. Molecular mass of X is greater than the molecular mass of Y.
3. Molecular mass of X is less than the molecular mass of Y.
4. Y is undergoing dissociation in water while X undergoes no change.
Subtopic:  Elevation of Boiling Point |
 59%
From NCERT
NEET - 2015
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The electrolyte having the same value of Van't Hoff factor (i) as that of Al2(SO4)3  (if all are 100% ionized) is:

1. K2SO4
2. K3[Fe(CN)6]
3. Al(NO3)3
4. K4[Fe(CN)6]

Subtopic:  Introduction & Colligative properties | Van’t Hoff Factor |
 85%
From NCERT
NEET - 2015
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The largest freezing point depression among the following O.10 m solutions is shown by:

1. \(\mathrm{KCl}\) 2. \(\mathrm{C_6H_{12}O_6}\)
3. \(\mathrm{Al}_2(\mathrm{SO_4})_3\) 4. \(\mathrm{K_2SO_4}\)
Subtopic:  Relative Lowering of Vapour Pressure |
 80%
From NCERT
AIPMT - 2014
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Which condition is not satisfied by an ideal solution?

1. \(\Delta\)mix V = 0
2. \(\Delta\)mix S = 0
3. Obeyance to Roult's Law
4. \(\Delta\)mix H = 0
Subtopic:  Raoult's Law |
 88%
From NCERT
NEET - 2013
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pA and pB are the vapor pressure of pure liquid components, A and B, respectively of an ideal binary solution.
If XA represents the mole fraction of component A, the total pressure of the solution will be:

1. pA + XA (pB-pA)
2. pA + XA(pA-pB)
3. pB + XA(pB-pA)
4. pB + XA(pA-pB)

Subtopic:  Dalton’s Law of Partial Pressure |
 70%
From NCERT
AIPMT - 2012
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Vapour pressure of chloroform (CHCl3) and dichloromethane (CH2Cl2) at 25°C are 200 mmHg and 41.5 mmHg respectively. Vapour pressure of the solution was obtained by mixing 25.5 g of (CHCl3) and 40 g of (CH2Cl2) at the same temperature will be: (Molecular mass of (CHCl3) = 119.5 u and molecular mass of (CH2Cl2) = 85 u)

1. 90.40 mm Hg 2. 119.5 mm Hg 
3. 75 mm Hg  4. 173.9 mm Hg 
Subtopic:  Raoult's Law |
From NCERT
AIPMT - 2012
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The freezing point depression constant for water is 1.86 oC m-1. If 5.00 g Na2SOis dissolved in 45.0 g H2O, the freezing point is changed by -3.82 oC. The van’t Hoff factor for Na2SO4 is:

1. 2.63 2. 3.11
3. 0.381 4. 2.05
Subtopic:  Depression of Freezing Point |
 69%
From NCERT
AIPMT - 2011
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The van’t Hoff factor, i, for a compound that undergoes
dissociation and association in a solvent is, respectively:

1. Less than one and less than one.
2. Greater than one and less than one.
3. Greater than one and greater than one.
4. Less than one and greater than one.

Subtopic:  Van’t Hoff Factor |
 85%
From NCERT
AIPMT - 2011
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A 0.1 molal aqueous solution of a weak acid (HA) is 30 % ionized. If Kf for water is 1.86 °C/m, the freezing point of the solution will be:

1. –0.24 °C  2. –0.18 °C
3. –0.54 °C  4. –0.36 °C
Subtopic:  Depression of Freezing Point |
 66%
From NCERT
AIPMT - 2011
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