How do alkynes react with hypochlorous acids? Discuss its mecha
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    Hydrocarbons

    Multiple Choice QuestionsLong Answer Type

    181.

    Give two reactions of electrophilic addition on acetylene along with their mechanism.

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    182. Give two reactions of electrophilic addition on acetylene along with their mechanism.
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    183.

    How do alkynes react with hypochlorous acids? Discuss its mechanism. 
    Or
    HC space identical to space CH space rightwards arrow with Cl subscript 2 divided by straight H subscript 2 straight O on top space CHCl subscript 2 space minus space CHO

    Both hypochlorous acid HOCl (Cl2 | H2O) and hypobromous acid HOBr (Br2 | H2O) react with alkynes in two steps.


    Mechanism: It is an example of electrophilic addition and proceeds in two steps:


    Step II. The electrophilic addition is repeated again when the final compound gets formed.







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    Multiple Choice QuestionsShort Answer Type

    184.

    How does acetylene react with:
    (i) Gaseous chlorine
    (ii) Liquid bromine?

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    Multiple Choice QuestionsLong Answer Type

    185.

    Starting from acetylene how will you obtain:
    (i) Ethylidene iodide
    (ii) Dichloro acetaldehyde
    (iii) Ethylene?

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    186. Give a brief account of the nucleophilic addition in alkynes.
    Or
    What is the role of Hg2+ ions in the nucleophilic addition reaction of alkynes?
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    187. How does acetylene react with:
    (i) Water in the presence of dilute H2SO4 and HgSO4
    (ii) HCN in the presence of barium cyanide?
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    188. Explain the catalytic hydrogenation of alkynes.
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    Multiple Choice QuestionsShort Answer Type

    189. How will you carry out the following conversions?
    left parenthesis straight i right parenthesis space Br subscript 2 CH space minus space CHBr subscript 2 space rightwards arrow space space HC space identical to space CH left parenthesis ii right parenthesis space straight H subscript 3 straight C space minus space straight C space identical to space CH space rightwards arrow space space straight H subscript 3 CCOCH subscript 3
    187 Views
    Answer

    Multiple Choice QuestionsLong Answer Type

    190.

    Starting from Ethyne, how will you prepare (No mechanism):
    (i) Ethanol (ii) Vinyl chloride (iii) Methyl vinyl ether (iv) Vinyl acetate?

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