1.

    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

    Related Questions

    1.

    Camphor is used as solvent to determine mol. wt. of non-volatile solute by Rast method because for camphor :

    A

    It is readily available

    B

    It is volatile

    C

    Molal depression constant is high

    D

    It is solvent for organic substances

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Solutions
    🎯Topic:Colligative Properties
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Colligative properties, Molal depression constant, Rast method

    2.

    Which statement is not correct if two immiscible liquids of mol. wt. A and B respectively are mixed in equal amount to have a mixture?

    A

    The total vapor pressure of the mixture is equal to the sum of the vapor pressures of the two pure components.

    B

    The mole fraction of each component is directly proportional to its molecular weight in the mixture.

    C

    The boiling point of the mixture is lower than the boiling points of its both components.

    D

    The partial vapor pressure of each component is proportional to its mole fraction in the mixture.

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Solutions
    🎯Topic:Colligative Properties
    🎓 Ncert Level:Analyzing
    🎯Difficulty :Easy
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :Raoult's Law, Partial Pressure, Vapor Pressure, Mole Fraction, Immiscible Liquids

    3.

    Beckmann thermometer are used to measure :

    A

    Boiling point of the solution

    B

    Freezing point of the solution

    C

    Any temperature

    D

    Elevation in boiling point or depression in freezing point

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Solutions
    🎯Topic:Colligative Properties
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Beckmann thermometer, colligative properties, elevation in boiling point, depression in freezing point

    4.

    If molality of the dilute solution is doubled, the value of molal depression constant (Kf)({K_f}) will be

    A

    Unchanged

    B

    Doubled

    C

    Halved

    D

    Tripled

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

    5.

    In the case of osmosis, solvent molecules move from :

    A

    A region of higher solvent concentration to a region of lower solvent concentration

    B

    A region of lower solvent concentration to a region of higher solvent concentration

    C

    A region of higher solute concentration to a region of lower solute concentration

    D

    A region of equal solute concentration to another region of equal solute concentration

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Solutions
    🎯Topic:Colligative Properties
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :osmosis, vapour pressure, concentration

    6.

    The reverse of fusion is freezing and it is :

    A

    Endothermic

    B

    Exothermic

    C

    Neither exothermic nor endothermic

    D

    May be exothermic or endothermic

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Solutions
    🎯Topic:Colligative Properties
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Phase Changes, Endothermic, Exothermic

    7.

    From the colligative properties of solution which one is the best method for the determination of molecular weight of proteins and polymers :

    A

    Osmotic pressure

    B

    Lowering in vapour pressure

    C

    Lower in freezing point

    D

    Elevation in boiling point

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Solutions
    🎯Topic:Colligative Properties
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Colligative properties, Molecular weight determination, Osmotic pressure

    8.

    When 20 g of naphthoic acid (C11H8O2)({C_{11}}{H_8}{O_2}) is dissolved in 50 g of benzene (kf=1.72  K  kg  mol−1)({k_f} = 1.72\;K\;{\rm{kg}}\;{\rm{ mo}}{{\rm{l}}^{ - 1}}), a freezing point depression of 2 K is observed. The van’t Hoff factor (i) is

    A

    0.5

    B

    1.0

    C

    1.5

    D

    2.0

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Solutions
    🎯Topic:Colligative Properties
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :3 mins
    🔄Ncert Concepts :Colligative properties, Freezing point depression, van't Hoff factor, Molar mass

    9.

    Abnormal colligative properties are observed only when the dissolved non-volatile solute in a given dilute solution

    A

    Is a non-electrolyte

    B

    Offers an intense colour

    C

    Associates of dissociates

    D

    Offers no colour

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Solutions
    🎯Topic:Colligative Properties
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :colligative properties, van't Hoff factor, association, dissociation

    10.

    For an aqueous solution, freezing point is −0.186∘-0.186^\circ . Elevation of the boiling point of the same solution is (kf=1.86∘  mol−1  and  kb=0.512∘  mol−1  kg)({k_f} = 1.86^\circ \;{\rm{ }}mo{l^{ - 1}}\;and\;{k_b} = 0.512^\circ \;{\rm{ }}mo{l^{ - 1}}\;kg)

    A

    0.186∘0.186^\circ

    B

    0.0512∘0.0512^\circ

    C

    1.86∘1.86^\circ

    D

    5.12∘5.12^\circ

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Solutions
    🎯Topic:Colligative Properties
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Freezing point depression, Boiling point elevation, Colligative properties

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