1.

Increasing order of reactivity of the following alkyl halide in the Willamson's synthesis is underset(I)(CH_2=CHCH_2CI), underset(II)(CH_3CH_2CH_2Br),underset(III)((CH_(3))C CH_2Br),underset(IV)(CH_3CH_2CH_2CI)

Answer»

`II lt III lt IV lt I`
`III lt II lt IV lt I`
`IV lt III lt I lt II`
`III lt IV lt II lt I`

SOLUTION :`CH_2=CH-CH_2-CI` ("Allylic and 1^(@)) gt`CH_3CH_2CH_2-Br(1^(@)`and C-Br BOND) gt`CH_3CH_2CH_2-CI(1^(@)and C-CI bond) gt`
`(CH_(3))_(3)CCH_2Br` (Neopentyl bromide, a sterically HINDERED R-X)


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