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.

    Paper chromatography is an example of:

    A

    Adsorption chromatography

    B

    Partition chromatography

    C

    Thin layer chromatography

    D

    Column chromatography

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Purification Of Organic Compounds
    PYQ YEAR: 2020
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :chromatography, separation techniques

    2.

    In a solution, solvent can be separated from solute by one of the following process

    A

    Decantation

    B

    Filtration

    C

    Distillation

    D

    Sedimentation

    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 :Solutions, Solvents, Solutes, Separation Techniques, Distillation

    3.

    The process of separating a solid from a liquid by pouring off the liquid is known as:

    A

    Filtration

    B

    Decantation

    C

    Crystallization

    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 :1 mins
    🔄Ncert Concepts :Purification, Organic Chemistry, Decantation

    4.

    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, Steam distillation

    5.

    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

    6.

    In sulphur detection of an organic compound, sodium nitroprusside solution is added to sodium extract. Formation of violet colour is due to

    A

    Na3Fe(CN)6{\rm{N}}{{\rm{a}}_3}{\rm{Fe}}{\left( {{\rm{CN}}} \right)_6}

    B

    Na3[Fe(CN)5NOS]{\rm{N}}{{\rm{a}}_3}\left[ {{\rm{Fe}}{{\left( {{\rm{CN}}} \right)}_5}{\rm{NOS}}} \right]

    C

    Fe(CNS)3{\rm{Fe}}{\left( {{\rm{CNS}}} \right)_3}

    D

    None 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 :2 mins
    🔄Ncert Concepts :Qualitative analysis, Sulphur detection, Coordination chemistry

    7.

    Separation of petroleum into its components is mostly done by:

    A

    Chromatography

    B

    Sublimation

    C

    Distillation under reduced pressure

    D

    Fractional 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, petroleum refining, fractional distillation

    8.

    Which of the following fractions obtained in fractional distillation of coal-tar contains benzene and toluene?

    A

    Light oil

    B

    Heavy oil

    C

    Middle oil

    D

    Green oil

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Purification Of Organic Compounds
    🎓 Ncert Level:Remembering
    🎯Difficulty :Hard
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :fractional distillation, coal tar, aromatic hydrocarbons, benzene, toluene

    9.

    Which method is used to purify liquids that decompose at or below their boiling points?

    A

    Simple distillation

    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:Application
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Purification, Organic Chemistry, Distillation, Vacuum distillation

    10.

    Which purification technique is MOST suitable for separating a thermally unstable liquid organic compound from a non-volatile impurity?

    A

    Simple distillation

    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:Application
    🎯Difficulty :Hard
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Distillation, boiling point, vacuum distillation, purification techniques

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