Haloalkanes and Haloarenes

Short Answer Type

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Give reasons:

Racemic mixture is optically inactive.

The racemic mixture contains two enantiomers (d and l forms) in equal proportions and thus, the rotation due to one isomer is cancelled by the rotation due to another. Therefore, it has zero optical rotation and hence, it is optically inactive.

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    Which alkyl halide from the following pair is chiral and undergoes faster SN2 reaction?

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    Draw the structure of major monohalo product in each of the following reactions: 
    i) 


    ii) 

     

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    Write the resonance structure of chlorobenzene. Why is chlorobenzene less reactive than chloromethane towards nucleophiles?
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    Long Answer Type

    Give the laboratory preparation of the Iodoform and its mechanism?
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    Short Answer Type

    Give reasons:

    The presence of nitro group (–NO2) at o/p positions increases the reactivity of haloarenes towards nucleophilic substitution reactions.

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    Out of SN1 and SN2, which reaction occurs with

    (a) Inversion of configuration

    (b) Racemisation 

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    Write the IUPAC name of


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    Give reasons:

    n-Butyl bromide has higher boiling point than t-butyl bromide.

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    Which would undergo SN2 reaction faster in the following pair and why?

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