1.

    Which of the following reactions does NOT produce an alkane?

    A

    Wurtz reaction

    B

    Reduction of an alkyl halide with LiAlH4LiAlH_4

    C

    Kolbe's electrolytic method

    D

    Dehydration of an alcohol

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Hydrocarbons
    🎯Topic:Alkanes
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Hard
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Alkanes, Preparation methods

    Related Questions

    1.

    CaC2+H2OoXβ†’O3/H2OOH+HCOOH+HCOOH,Xβ€…β€Šis{\rm{Ca}}{{\rm{C}}_2} + {{\rm{H}}_2}{\rm{O}} o X\xrightarrow{{{{\rm{O}}_3}/\frac{{{{\rm{H}}_2}{\rm{O}}}}{{{\rm{O}}{{\rm{H}}^ + }}}}}{\rm{HCOOH}} + {\rm{HCOOH}},X\;{\rm{is}}

    A

    C2H4{{\rm{C}}_2}{{\rm{H}}_4}

    B

    C2H2{{\rm{C}}_2}{{\rm{H}}_2}

    C

    C2H6{{\rm{C}}_2}{{\rm{H}}_6}

    D

    Ca(OH)2{\rm{Ca}}{\left( {{\rm{OH}}} \right)_2}

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Hydrocarbons
    🎯Topic:Alkanes
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Reaction of calcium carbide with water, Ozonolysis, Alkynes

    2.

    Propane cannot be prepared from which reaction?

    A

    CH3βˆ’CH=CH2β†’OHβˆ’B2H6{\rm{C}}{{\rm{H}}_3} - {\rm{CH}} = {\rm{C}}{{\rm{H}}_2}\xrightarrow[{{\rm{O}}{{\rm{H}}^ - }}]{{{{\rm{B}}_2}{{\rm{H}}_6}}}

    B

    CH3CH2CH2I→PHI{\rm{C}}{{\rm{H}}_3}{\rm{C}}{{\rm{H}}_2}{\rm{C}}{{\rm{H}}_2}{\rm{I}}\xrightarrow[P]{{HI}}

    C

    CH3CH2CH2COONa→NaOH/CaO,Δ{\rm{C}}{{\rm{H}}_3}{\rm{C}}{{\rm{H}}_2}{\rm{C}}{{\rm{H}}_2}{\rm{COONa}}\xrightarrow{{{\rm{NaOH}}/{\rm{CaO}},\Delta }}

    D

    None of the above

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Hydrocarbons
    🎯Topic:Alkanes
    πŸŽ“ Ncert Level:Analyzing
    🎯Difficulty :Medium
    ⚑ Time Required :3 mins
    πŸ”„Ncert Concepts :Hydroboration-oxidation, Reduction, Decarboxylation, Organic Reaction Mechanisms

    3.

    Which alkane (molecular mass = 72) would yield only three mono chlorinated derivates

    A

    n - pentane

    B

    iso hexane

    C

    n - hexane

    D

    iso pentane

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Hydrocarbons
    🎯Topic:Alkanes
    πŸŽ“ Ncert Level:Analyzing
    🎯Difficulty :Medium
    ⚑ Time Required :3 mins
    πŸ”„Ncert Concepts :alkanes, chlorination, isomers, structural analysis

    4.

    Which of the following will not produce ethane?

    A

    Hydrogenation of ethene

    B

    Wurtz reaction of chloroethane

    C

    Kolbe's electrolysis of sodium acetate

    D

    Dehydration of ethanol

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Hydrocarbons
    🎯Topic:Alkanes
    πŸŽ“ Ncert Level:Analyzing
    🎯Difficulty :Medium
    ⚑ Time Required :3 mins
    πŸ”„Ncert Concepts :Reduction, Decarboxylation, Hydrogenation, Organic Reactions, Alkane Synthesis

    5.

    Which of the following cycloalkane gives open chain compound, when reacts with bromine?

    A

    Cyclopropane

    B

    Cyclopentane

    C

    Cyclohexane

    D

    Cyclooctane

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Hydrocarbons
    🎯Topic:Alkanes
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Cycloalkanes, Ring Strain, Halogenation, Reaction Mechanism

    6.

    Which one of the following has the minimum boiling point?

    A

    n-butane

    B

    1-butyne

    C

    1-butene

    D

    Iso-butene

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Hydrocarbons
    🎯Topic:Alkanes
    πŸŽ“ Ncert Level:Analyzing
    🎯Difficulty :Easy
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :boiling point, intermolecular forces, isomerism, branching

    7.

    Octane no. of 2,3,3-trimethylbutane has been assumed to be:

    A

    100

    B

    βˆ’45 - 45

    C

    124

    D

    Zero

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Hydrocarbons
    🎯Topic:Alkanes
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Octane number, Isomer structure, Hydrocarbon properties

    8.

    Most of the hydrocarbons from petroleum are obtained by:

    A

    Fractional distillation

    B

    Fractional crystallization

    C

    Vaporisation

    D

    Polymerization

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Hydrocarbons
    🎯Topic:Alkanes
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Fractional distillation, Hydrocarbons, Petroleum

    9.

    Rotating the C-C bond in ethane by 60Β° from the eclipsed conformation results in which conformation?

    A

    Staggered

    B

    Eclipsed

    C

    Gauche

    D

    Anti

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Hydrocarbons
    🎯Topic:Alkanes
    PYQ YEAR: 2016
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Easy
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :conformational isomerism, bond rotation, ethane

    10.

    Methane reacts with conc. HNO3{\rm{HN}}{{\rm{O}}_3} at high temperature to yield:

    A

    CO2β€…β€Šandβ€…β€ŠH2O{\rm{C}}{{\rm{O}}_2}\;{\rm{and}}\;{{\rm{H}}_2}{\rm{O}}

    B

    HCHOHCHO

    C

    HCOOHHCOOH

    D

    CH3NO2{\rm{C}}{{\rm{H}}_3}{\rm{N}}{{\rm{O}}_2}

    Question Tags
    πŸ“š Subject:Chemistry
    πŸ“‘ Chapter:Hydrocarbons
    🎯Topic:Alkanes
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Easy
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Reaction of alkanes, Nitration, Organic reactions

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