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Lowering of vapor pressu..



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Q1. What does the vapor pressure of solvent containing a non-volatile solute, in a closed system directly vary with?

(a) Mole fraction of solute
(b) Mole fraction of solvent
(c) Molarity of solute
(d) Molarity of solvent

Q2. Which of the following is caused by the addition of a non-volatile solute to a solvent?

(a) Reduction in equilibrium of vapor pressure of solution
(b) Increase in melting point of the solution
(c) Decrease in the boiling point of the solution
(d) Osmosis of solute in the solution

Q3. A volatile liquid with vapor pressure 85 kPa (at sea level, 25? C) is taken to the peak of Mt. Everest. Which of the following is true?

(a) The vapor pressure of the solution decreases
(b) The solution will condense quickly than when at sea level
(c) The solution will vaporize quickly than when at sea level
(d) The vapor pressure of the solution increases

Q4. Considering a binary solution of components A and B obeys Raoult?s law, which of the following is true?

(a) Total vapor pressure cannot be related to mole fraction of only one component
(b) Total vapor pressure of one component varies non-linearly with another component
(c) A plot of vapor pressures of both components gives a linear plot
(d) Total vapor pressure of solution always decreases with increase in mole fraction of a component

Q5. If ethanol and chloroform are present in a molar ratio of 2:3 then what is the vapor pressure at 20? C if vapor pressures of pure liquids are 5.95 kPa and 21.17 kPa, respectively?

(a) 16.692 kPa
(b) 15.082 kPa
(c) 8.731 kPa
(d) 12.038 kPa

Q6. What deviation is shown by a mixture of equimolar phenol and aniline?

(a) Negative deviation
(b) Positive deviation
(c) No deviation
(d) Alternating positive and negative

Q7. If a mixture of A and B boils at a temperature lower than the boiling point of either of the components, what kind of deviation does the mixture show?

(a) No deviation
(b) Maximum and minimum deviation from Raoult?s law
(c) Negative deviation from Raoult?s law
(d) Positive deviation from Raoult?s law

Q8. ?Total pressure of gas mixture is the sum of individual pressures?. Which law is reflected in this statement?

(a) Amagat?s law
(b) Raoult?s law
(c) Dalton?s law
(d) Henry?s law

Q9. What is the boiling point of water?

(a) 100 ?F
(b) 671.67 ?R
(c) 373 ?C
(d) 212 ?r

Q10. What phenomenon occurs when a solution?s equilibrium vapor pressure equals the surrounding atmospheric pressure?

(a) Boiling
(b) Melting
(c) Condensation
(d) Sublimation


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791 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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244 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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775 views

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 244 Year Ago

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244 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 244 Year Ago

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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 244 Year Ago

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244 Year Ago

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

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576 views

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

Modified 5 Year Ago

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5 Year Ago

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

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559 views

The Volume Strength Of 1.5 N H2O2 Solution Is

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244 Year Ago

The Volume Strength Of 1.5 N H2O2 Solution Is

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519 views

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

Modified 244 Year Ago

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244 Year Ago

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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