The boiling point of acetic acid is 118.1$°\mathrm{C}$ and its latent heat of vaporisation is 121 cal/gm. A solution containing 0.4344 gm anthracene in 44.16 gm acetic acid boils at 118.24$°\mathrm{C}$. What is the molecular wt. of anthracene ? 1. 122 2. 178 3. 105 4. 154

Subtopic:  Elevation of Boiling Point |
65%
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Which solution will have the highest boiling point ?

1. 1 (M) C6H12O6 solution

2. 1 (M) NaCl solution

3. 1 (M) BaCl2 solution

4. 1 (M) CO(NH2)2 solution

Subtopic:  Van’t Hoff Factor |
63%
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A 2.0% solution by weight of urea in water shows a boiling point elevation of 0.18 deg [Molecular weight of urea=60]. Calculate the latent heat of vaporization per gram of water.

1. 495.3 cal/g

2. 560.3 cal/g

3. 525.8 cal/g

4. 501.3 cal/g

Subtopic:  Elevation of Boiling Point |
52%
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A solution of 18 g of glucose in 1000 g of water is cooled to -0.2 oC. The amount of ice separating out from this solution is -

[Kf(H2O) = 1.86 K molal-1]

 1 70 g 2 140 g 3 90 g 4 210 g
Subtopic:  Depression of Freezing Point |
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The partial pressure of ethane over a saturated solution containing 6.56 X 10-2 g of ethane is 1 bar. If the solution contains 5.00 X 10-2 g of ethane, then what shall be the partial pressure of the gas?

1. 0.76 bar

2. 0.16 bar

3. 1.16 bar

4. 3.12 bar

Subtopic:  Concentration Terms & Henry's Law |
74%
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In a dilute solution, any colligative property depends on

1. The total number of neutral species in the solution

2. The total number of ionic species in the solution

3. The total number of species irrespective of whether they are ionic or non-ionic.

4. The types of forces operating between the non-ionic species, ionic species and the solvent molecules

Subtopic:  Introduction & Colligative properties |
60%
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An aqueous solution of 2 percent non volatile solute exerts a pressure of 1.004 bar at the boiling point of the solvent. What is the molecular mass of the solute ?

1. 9.19 g mol-1

2. 41.3 g mol-1

3. 71.2 g mol-1

4. 50.4 g mol-1

Subtopic:  Concentration Terms & Henry's Law |
59%
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An aqueous solution of hydrochloric acid -

1. Obeys Raoult's law

2. Shows negative deviations from Raoult's law

3. Shows positive deviations from Raoult's law

4. Obeys Henry's law at all compositions

Subtopic:  Introduction & Colligative properties |
70%
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1000 gm of 1 m sucrose solution in water is cooled to -3.534$°\mathrm{C}$. What weight of ice would be separated out at this temperature ?

1. 352.98 gm.

2. 252.98 gm.

3. 302.98 gm.

4. 152.12 gm

Subtopic:  Depression of Freezing Point |
53%
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Osmotic pressure of equimolar solution of BaCl2, NaCl and glucose will be in the order -

1. BaCl> NaCl > glucose

2. glucose > NaCI > BaCl2

3. NaCl > BaCl2 >glucose

4. NaCl> glucose > BaCl2

Subtopic:  Osmosis & Osmotic Pressure |
86%
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