NEET
Practice Test 10
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Consider the following bromides:

The correct order of SN1 reactivity is

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The organic chloro compound, which shows complete stereochemical inversion during a SN2 reaction, is

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    SN2 reaction is favoured by small groups on the carbonatom attached to halogen.

    So, the order of reactivity is

    CH3Cl>(CH3)2CHCl>(CH3)3CCl>(C2H5)2CHCl

    SN2 reaction is shown to maximum extent by primary halides. The only primary halidesgiven is CH3Cl so the correct answer is (d).

Consider the reactions :

The mechanisms of reactions (i) and (ii) are respectively :

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    A strong nucleophile favours the SN2 reaction and a weak nucleophile favours the SN1 reaction.

    First reaction is SN1 reaction because C2H5OH is used as solvent which is a weak nucleophile.

    Second reaction is SN2 reaction because C2H5O– is strong nucleophile.

The reaction of toluene with Cl2 in presence of FeCl3 gives ‘X’and reaction in presence of light gives ‘Y’. Thus, ‘X’and ‘Y’ are :

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Which one of the following is not an allylic halide?

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The compound C is –

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X in the following reaction is–

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Which one of the following halogen compounds is difficult to behydrolysed by SN1 mechanism?

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    Chlorobenzene does not undergo hydrolysis by SN1 mechanism because in this halogen is present on sp2 hybridised carbon atom,such halogens are relatively inert.

Compound which cannot be synthesized by Wurtz reaction using one type of halide only.

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    Only the compound given in option(d) is assymetric as well as acyclic. Soit cannot be synthesized by Wurtz reaction using one type of halide only.

In the following sequence of reactions

the compound D is

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HALOALKANES AND HALOARENES
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