1.

    The observed freezing point depression of a 0.01 m aqueous solution of a weak acid HA is 0.0205 °C. If the KfK_f of water is 1.86 K kg/mol, which expression correctly calculates the percent ionization of the weak acid?

    A

    (0.0205/1.86/0.01)−1(2−1)imes100 \frac{(0.0205/1.86/0.01) - 1}{(2-1)} imes 100

    B

    (1.86imes0.01/0.0205)−1(2−1)imes100 \frac{(1.86 imes 0.01/0.0205) - 1}{(2-1)} imes 100

    C

    (0.0205/1.86/0.01)(2−1)imes100 \frac{(0.0205/1.86/0.01)}{(2-1)} imes 100

    D

    (1.86imes0.01imes0.0205)(2−1)imes100 \frac{(1.86 imes 0.01 imes 0.0205)}{(2-1)} imes 100

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Solutions
    🎯Topic:Colligative Properties
    🎓 Ncert Level:Application
    🎯Difficulty :Hard
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :Colligative Properties, Freezing Point Depression, van't Hoff Factor, Percent Ionization

    Related Questions

    1.

    Colligative properties depend on:

    A

    The nature of the solute particles

    B

    The size of the solute particles

    C

    The number of solute particles in the solution

    D

    The charge of the solute particles

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Solutions
    🎯Topic:Colligative Properties
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Colligative properties

    2.

    Molal elevation constant of a liquid is :

    A

    The elevent in b.p. which would be produced by dissolving one mole of solute in 100 g of solvent

    B

    The elevation of b.p. which would be produced by dissolving 1 mole solute in 10 g of solvent.

    C

    Elevation in b.p. which would be produced by dissolving 1 mole of solute in 1000 g of solvent

    D

    None of the above

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Solutions
    🎯Topic:Colligative Properties
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Molal elevation constant, boiling point elevation, colligative properties

    3.

    The molal elevation/depression constant depends upon :

    A

    Nature of solvent

    B

    Nature of solute

    C

    Temperature

    D

    ΔH\Delta H solution

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Solutions
    🎯Topic:Colligative Properties
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :colligative properties, molal elevation constant, molal depression constant

    4.

    In two solutions having different osmotic pressure, the solution of higher osmotic pressure is called :

    A

    Isotonic solution

    B

    Hypertonic solution

    C

    Hypotonic solution

    D

    None of these

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Solutions
    🎯Topic:Colligative Properties
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Osmotic pressure, Tonicity

    5.

    The relative lowering of vapour pressure of a solution containing a non-volatile solute is 0.0125. What is the mole fraction of the solute?

    A

    0.0250

    B

    0.0125

    C

    0.9875

    D

    1.0125

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Solutions
    🎯Topic:Colligative Properties
    🎓 Ncert Level:Application
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Colligative properties, Raoult's Law, Mole fraction

    6.

    If the molality of a dilute solution is doubled, what effect will this have on the molal freezing point depression constant (KfK_f)?

    A

    Remains the same

    B

    Doubles

    C

    Halves

    D

    Quadruples

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Solutions
    🎯Topic:Colligative Properties
    PYQ YEAR: 2017
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Colligative Properties, Freezing Point Depression, Molality

    7.

    Vapour pressure of a solvent containing non-volatile solute is :

    A

    More than the vapour pressure of a solvent

    B

    Less than the vapour pressure of solvent

    C

    Equal to the vapour pressure of solvent

    D

    None of the above

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Solutions
    🎯Topic:Colligative Properties
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Vapor Pressure, Raoult's Law, Non-volatile solute

    8.

    A thermometer which can be used only for accurate measurement of small differences in temperature is known as a:

    A

    Beckmann thermometer

    B

    Contact thermometer

    C

    Clinical thermometer

    D

    Platinum resistance thermometer

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Solutions
    🎯Topic:Colligative Properties
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Thermometry, Thermometer Types

    9.

    Which of the following colligative properties is most suitable for determining the molar mass of a polymer?

    A

    Elevation of boiling point

    B

    Depression of freezing point

    C

    Osmotic pressure

    D

    Relative lowering of vapour pressure

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Solutions
    🎯Topic:Colligative Properties
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Colligative properties, Osmotic pressure, Polymers, Molar mass determination

    10.

    The movement of solvent molecules through a semipermeable membrane is called

    A

    Electrolysis

    B

    Electrophoresis

    C

    Osmosis

    D

    Cataphoresis

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Solutions
    🎯Topic:Colligative Properties
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Osmosis, Semi-permeable membrane

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