1.

    A highly impure sample of benzoic acid is contaminated with naphthalene. Which of the following techniques would be LEAST effective for purifying the benzoic acid?

    A

    Simple distillation

    B

    Sublimation followed by recrystallization

    C

    Recrystallization from hot water

    D

    Treatment with sodium bicarbonate followed by acidification

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Purification Of Organic Compounds
    🎓 Ncert Level:Application
    🎯Difficulty :Hard
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Purification techniques, sublimation, recrystallization, distillation, acid-base properties

    Related Questions

    1.

    Thiophene is separated from benzene by:

    A

    Chlorination of thiophene

    B

    Sulphonation of thiophene

    C

    Nitration of thiophene

    D

    Oxidation of thiophene

    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 :Electrophilic Aromatic Substitution, Reactivity of Benzene and Thiophene, Separation Techniques

    2.

    Thiophene is separated from benzene by:

    A

    Chlorination of thiophene

    B

    Sulphonation of thiophene

    C

    Nitration of thiophene

    D

    Oxidation of thiophene

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Purification Of Organic Compounds
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :electrophilic aromatic substitution, reactivity of thiophene and benzene, organic reactions

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