1.

    A student attempts to purify a mixture of aniline and nitrobenzene by steam distillation. Which compound will distill over first, and why?

    A

    Nitrobenzene, due to its higher molecular weight

    B

    Aniline, due to its lower boiling point and formation of less extensive hydrogen bonds with water compared to nitrobenzene

    C

    Both will distill over simultaneously as they form an azeotropic mixture

    D

    Nitrobenzene, because it is less volatile than aniline

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Purification Of Organic Compounds
    🎓 Ncert Level:Analyzing
    🎯Difficulty :Hard
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Steam distillation, intermolecular forces, boiling point, aniline, nitrobenzene

    Related Questions

    1.

    Which is most commonly used to dry organic liquids?

    A

    Anhydrous magnesium sulfate

    B

    Sodium chloride

    C

    Calcium carbonate

    D

    Potassium permanganate

    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 :drying agents, organic chemistry, alkali metals

    2.

    Which purification method exploits the difference in boiling points to separate a liquid metal from its impurities?

    A

    Distillation

    B

    Electrolysis

    C

    Chromatography

    D

    Zone refining

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Purification Of Organic Compounds
    PYQ YEAR: 2021
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Distillation, Boiling Point

    3.

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

    A

    Distillation

    B

    Sublimation

    C

    Chromatography

    D

    Crystallisation

    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, sublimation, physical properties

    4.

    Which of the following process is not used for the purification of solid impurities?

    A

    Distillation

    B

    Sublimation

    C

    Crystallisation

    D

    Vaporisation

    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, Purification Methods

    5.

    Which purification technique separates liquids based on their different boiling points?

    A

    Crystallization

    B

    Sublimation

    C

    Distillation

    D

    Chromatography

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Purification Of Organic Compounds
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :0.5 mins
    🔄Ncert Concepts :Purification, Distillation

    6.

    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

    7.

    Diastereomers can be separated by :

    A

    Fractional distillation

    B

    Simple distillation

    C

    Electrophoresis

    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 :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :diastereomers, separation techniques, fractional distillation, simple distillation, electrophoresis

    8.

    Anthraquinone is prepared by the oxidation of anthracene by chromic acid. The crude reaction product is usually purified by

    A

    Fractional Crystallisation

    B

    Distillation

    C

    Steam distillation

    D

    Sublimation

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Purification Of Organic Compounds
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :purification techniques, sublimation, organic chemistry

    9.

    Lassaigne's test is used for the detection of

    A

    Carbon only

    B

    Hydrogen only

    C

    Oxygen only

    D

    Nitrogen, sulphur and halogens

    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 :Lassaigne's test, qualitative analysis, detection of elements

    10.

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

    A

    Distillation

    B

    Sublimation

    C

    Chromatography

    D

    Crystallisation

    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, sublimation, physical properties

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