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Colligative properties



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Q1. Which of the following is Raoult?s law applicable to, in order to determine molar masses correctly?

(a) Ionic solute in liquid
(b) Non-ionic solute in dilute solution
(c) Non-ionic solute in concentrated solution
(d) Ionic solid in insoluble form in solvent

Q2. Two components A and B have their pure vapor pressures in the ratio 1 ? 4 and respective mole fractions in solution in ratio 1 ? 2. What is the mole fraction of component B in vapor phase?

(a) 0.8889
(b) 0.125
(c) 0.8
(d) 0.2

Q3. When 2.0 grams of copper (II) nitrate is added to 1000 ml of pure water, by how much is the vapor pressure of water decreased, given that at 20?C the vapor pressure of pure water is 17.535 mm Hg?

(a) 3.1 x 10-4
(b) 0.303
(c) 0.0333
(d) 0.0033

Q4. When a non-volatile solute is added to a solvent what is the difference in vapor pressure expressed as a faction of original vapor pressure equal to?

(a) Mole fraction of solute in vapor phase
(b) Mole fraction of solvent in vapor phase
(c) Mole fraction of solute in liquid phase
(d) Mole fraction of solvent in liquid phase

Q5. On addition of non-volatile potassium iodide in water at 298K it is noticed that vapor pressure reduces from 23.8 mm Hg to 2.0 cm Hg. What is the mole fraction of solute in the solution?

(a) 0.916
(b) 0.16
(c) 0.084
(d) 0.092

Q6. If the relative lowering of pressure of o-xylene is 0.005 due to addition of 0.5 grams of non-volatile solute in 500 grams of solvent, what is the molecular weight of the solute?

(a) 21.3 g/mole
(b) 23.1 g/mole
(c) 32.1 g/mole
(d) 1.23 g/mole

Q7. If 1.5 grams of a non-volatile solute (MW = 100) is added to 200 ml pure CS2 (? = 1.3 g/cc) whose vapor pressure is 400 mm of Hg at 28.0?C, what is the resulting vapor pressure of the dilute solution?

(a) 401.246 mm Hg
(b) 398.754 mm Hg
(c) 401.754 mm Hg
(d) 398.246 mm Hg

Q8. Which law specifically governs the relative lowering of vapor pressures in solutions?

(a) van?t Hoff law
(b) Boyle?s law
(c) Raoult?s law
(d) Amagat?s law

Q9. Which of the following is a colligative property?

(a) Relative lowering of fluid pressure
(b) Decrease in boiling point
(c) Decrease in freezing point
(d) Change in volume after mixing

Q10. What are the properties arising due to varying concentrations of solute in a given solvent, irrespective of the nature of solute with respect to the solvent?

(a) Colligative properties
(b) Intensive properties
(c) Extensive properties
(d) Solute properties


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786 views

The Statement "If 0.003 Moles Of A Gas Are Dissolved In 900 G Of Water Under A Pressure Of 1 Atmosphere, 0.006 Moles Will Be Dissolved Under A Pressure Of 2 Atmosphere", Illustrates

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239 Year Ago

The Statement "If 0.003 Moles Of A Gas Are Dissolved In 900 G Of Water Under A Pressure Of 1 Atmosphere, 0.006 Moles Will Be Dissolved Under A Pressure Of 2 Atmosphere", Illustrates

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If 1 M And 2.5 Litre NaOH Solution Is Mixed With Another 0.5 M And 3 Litre NaOH Solution, Then Molarity Of The Resultant Solution Will Be

Modified 239 Year Ago

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239 Year Ago

If 1 M And 2.5 Litre NaOH Solution Is Mixed With Another 0.5 M And 3 Litre NaOH Solution, Then Molarity Of The Resultant Solution Will Be

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675 views

The Solubility Of A Gas In Water Depends On

Modified 239 Year Ago

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239 Year Ago

The Solubility Of A Gas In Water Depends On

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When 7.1gm Na2SO4 (molecular Mass 142) Dissolved In 100ml H2O, The Molarity Of The Solution Is

Modified 239 Year Ago

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239 Year Ago

When 7.1gm Na2SO4 (molecular Mass 142) Dissolved In 100ml H2O, The Molarity Of The Solution Is

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Molarity Of A Given Orthophosphoric Acid Solution Is 3 M. Its Normality Is

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Molarity Of A Given Orthophosphoric Acid Solution Is 3 M. Its Normality Is

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555 views

The Volume Strength Of 1.5 N H2O2 Solution Is

Modified 239 Year Ago

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239 Year Ago

The Volume Strength Of 1.5 N H2O2 Solution Is

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515 views

What Is Molarity Of A Solution Of HCL Which Contains 49% By Weight Of Solute And Whose Specific Gravity Is 1.41

Modified 239 Year Ago

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What Is Molarity Of A Solution Of HCL Which Contains 49% By Weight Of Solute And Whose Specific Gravity Is 1.41

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