At 100 °C the vapour pressure of a solution of 6.5 g of a solute in 100 g water is 732 mm. If Kb = 0.52, the boiling point of this solution will be:
1. 100 oC
2. 102 oC
3. 103 oC
4. 101 oC
Subtopic:  Relative Lowering of Vapour Pressure | Elevation of Boiling Point |
59%
From NCERT
NEET - 2016
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A solution of urea (molar mass 56 g mol–1) boils at 100.18 ºC at atmospheric pressure. If Kf and Kb for water are 1.86 and 0.512 K kg mol–1 respectively, the above solution will freeze at:

1. –6.54 ºC

2. –0.654 ºC

3. 6.54 ºC

4. 0.654 ºC

Subtopic:  Elevation of Boiling Point | Depression of Freezing Point |
75%
From NCERT
AIPMT - 2005
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The boiling point of benzene is 353.23 K. When 1.80 g of a non-volatile solute was dissolved in 90 g of benzene, the boiling point is raised to 354.11 K. The molar mass of the solute is:

Kb for benzene is 2.53 K kg mol–1

1. 55 g mol–1
2. 64 g mol–1
3. 58 g mol–1
4.
68 g mol–1

Subtopic:  Elevation of Boiling Point |
64%
From NCERT
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The boiling point of 1M Urea solution is 101°C. At the same conditions of temperature and pressure, the boiling point of 1M KCl solution will be (Assume that KCl is 100% dissociated)
1. 102°C
2. 202°C
3. 104°C
4. Data insufficient
Subtopic:  Elevation of Boiling Point |
58%
From NCERT