1.

    Which technique is most effective for separating a 1:1 mixture of ortho-nitrophenol and para-nitrophenol?

    A

    Steam distillation

    B

    Sublimation

    C

    Chromatography

    D

    Simple distillation

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Purification Of Organic Compounds
    PYQ YEAR: 2017
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Separation Techniques, Hydrogen Bonding, Isomerism

    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:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :electrophilic aromatic substitution, reactivity of thiophene and benzene, organic reactions

    2.

    Which is most commonly used to dry organic liquids?

    A

    Anhydrous Sodium Sulfate

    B

    Sodium Carbonate

    C

    Sodium Chloride

    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

    3.

    Which of the following techniques is NOT typically used for the purification of organic liquids?

    A

    Distillation

    B

    Fractional distillation

    C

    Sublimation

    D

    Chromatography

    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, Distillation, Sublimation, Chromatography

    4.

    Which of the following statement is not applicable to Beilstein test?

    A

    Green or bluish green flame is due to the formation of volatile cupric halides

    B

    It does not tell us to which halogen is present in the organic compound

    C

    It is very sensitive test can be easily performed

    D

    It is a sure test for the presence of halogen

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Purification Of Organic Compounds
    🎓 Ncert Level:Analyzing
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Beilstein test, Halogens, Organic Chemistry, Chemical Tests

    5.

    In chromatography, the mobile phase can be:

    A

    Only a liquid

    B

    Only a gas

    C

    Either a liquid or a gas

    D

    A solid

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Organic Chemistry: Some basic principles and techniques
    🎯Topic:Purification Of Organic Compounds
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Purification, Organic Chemistry, Chromatography, Mobile phase

    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.

    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

    8.

    Glycerol can be separated from spent-lye in soap industry by

    A

    Steam distillation

    B

    Fractional distillation

    C

    Distillation under reduced pressure

    D

    Ordinary distillation

    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 :Separation Techniques, Distillation, Reduced Pressure Distillation

    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.

    Which of the following process is suitable for the purification of aniline?

    A

    Simple distillation

    B

    Fractional distillation

    C

    Fractional crystallisation

    D

    Steam distillation

    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 techniques, Boiling point, Volatility, Steam distillation

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