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Which of the following can be used as the halide component for Freidel-Crafts reaction?

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Important Questions on Haloalkanes and Haloarenes

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The most reactive nucleophile among the following is:
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The correct increasing order of the reactivity of halides for SN1  reaction is :
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Tertiary alkyl halides are practically inert to substitution by SN2 mechanism because :
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Elimination of HBr from 2-bromobutane results in the formation of
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The reaction of trans-2-phenyl-1-bromocyclopentane on reaction with alcoholic KOH produces:
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CH3Br+Nu-CH3Nu+Br-

The decreasing order of the rate of the above reaction with nucleophiles Nu- A to D is Nu- = (A) PhO-, (B) AcO-, (C) HO-, (D) CH3O-

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Which of the following is the correct order of decreasing SN2 reactivity?
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In SN2 reactions, the correct order of reactivity for the following compounds : CH3Cl,CH3CH2ClCH32CHCland CH33CCl is :