How is acetylene obtained from:(i) Ethylene dibromide?(ii) Tetr
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    Hydrocarbons

    Multiple Choice QuestionsShort Answer Type

    171.

    Give reduction of phenol ?

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    Multiple Choice QuestionsLong Answer Type

    172.

    Discuss in brief the polymerisation reactions of alkenes ?

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    173.

    Enlist three uses of ethylene.

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    Multiple Choice QuestionsLong Answer Type

    174.

    What are alkynes?

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    175.

    For the following compounds, write structural formulas and IUPAC names for all possible isomers having the number of double or triple bond as indicated:

    left parenthesis straight i right parenthesis space space straight C subscript 4 straight H subscript 8 left parenthesis one space double space bond right parenthesis left parenthesis ii right parenthesis space straight C subscript 5 straight H subscript 8 space left parenthesis one space triple space bond right parenthesis

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    176. Write structures of different isomers corresponding to the 5th member of alkyne series. Also, write IUPAC names of all the isomers ?
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    Multiple Choice QuestionsShort Answer Type

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    177.

    How is acetylene obtained from:
    (i) Ethylene dibromide?
    (ii) Tetrabromoethane ?

    (i) From ethylene dibromide: Acetylene is prepared by treating ethylene dibromide with an alcoholic solution of potassium hydroxide.



    (ii) From tetrabromo ethane. Acetylene is prepared by heating tetrabromo ethane with zinc dust.
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    Multiple Choice QuestionsLong Answer Type

    178.

    Discuss the preparation of higher alkynes.

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    179.

    Why do alkynes undergo electrophilic addition reactions ?

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    Multiple Choice QuestionsShort Answer Type

    180. Alkynes are less reactive towards electrophilic addition reactions than alkenes. Explain.
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