1.

    Fractional crystallisations is carried out to separate a mixture of

    A

    Organic solids mixed with inorganic solids

    B

    Organic solids slightly soluble in water

    C

    Organic solids having small difference in their solubilities in suitable solvent

    D

    Organic solids having great difference in their solubilities in suitable solvent

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Purification Of Organic Compounds
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Fractional Crystallization, Solubility, Organic Solids, Separation Techniques

    Related Questions

    1.

    Aniline is separated by:

    A

    Fractional crystallisation

    B

    Fractional distillation

    C

    Steam distillation

    D

    Vacuum distillation

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Purification Of Organic Compounds
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Separation techniques, Boiling point, Organic chemistry

    2.

    Steam distillation is based on the fact that vaporisation of organic liquid takes place at

    A

    Lower temperature than its boiling point

    B

    Higher temperature than its boiling point

    C

    Its boiling point

    D

    Water and organic liquid both undergo distillation

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Purification Of Organic Compounds
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :steam distillation, vapor pressure, boiling point

    3.

    The best method for the separation of naphthalene and benzoic acid from their mixture is

    A

    Chromatography

    B

    Crystallisation

    C

    Distillation

    D

    Sublimation

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Purification Of Organic Compounds
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Separation Techniques, Solubility, Crystallization, Sublimation, Distillation, Chromatography

    4.

    A mixture of benzene and CHCl3CHC{l_3} is separated by

    A

    Sublimation

    B

    Separating funnel

    C

    Crystallisation

    D

    Distillation

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Purification Of Organic Compounds
    🎓 Ncert Level:Application
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :separation techniques, boiling point, intermolecular forces

    5.

    The best method for the separation of naphthalene and benzoic acid from their mixture is

    A

    Chromatography

    B

    Crystallisation

    C

    Distillation

    D

    Sublimation

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Purification Of Organic Compounds
    🎓 Ncert Level:Application
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :separation techniques, solubility, physical properties

    6.

    The best method for the separation of naphthalene and benzoic acid from their mixture is

    A

    Chromatography

    B

    Crystallisation

    C

    Distillation

    D

    Sublimation

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Purification Of Organic Compounds
    🎓 Ncert Level:Application
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Separation Techniques, Solubility, Physical Properties

    7.

    Fractional distillation is useful in distillation of

    A

    Petroleum

    B

    Coal-tar

    C

    Crude alcohol

    D

    All of these

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Purification Of Organic Compounds
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :fractional distillation, petroleum, coal-tar, crude alcohol

    8.

    Steam distillation is based on the fact that vaporisation of organic liquid takes place at

    A

    Lower temperature than its boiling point

    B

    Higher temperature than its boiling point

    C

    Its boiling point

    D

    Water and organic liquid both undergo distillation

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Purification Of Organic Compounds
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :vapor pressure, boiling point, steam distillation

    9.

    Fractional crystallisations is carried out to separate a mixture of

    A

    Organic solids mixed with inorganic solids

    B

    Organic solids slightly soluble in water

    C

    Organic solids having small difference in their solubilities in suitable solvent

    D

    Organic solids having great difference in their solubilities in suitable solvent

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Purification Of Organic Compounds
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Fractional Crystallization, Solubility, Organic Solids, Separation Techniques

    10.

    A Dewar flask is usually used to:

    A

    Measure the amount of liquid

    B

    Measure known volumes of a gas

    C

    Store distilled water

    D

    Store liquid air

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Purification Of Organic Compounds
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Dewar flask, thermal insulation

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