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Which reagent cannot be used to prepare haloakane from an alcohol ?A. HClB. HBrC. HID. `Br_(2)`

Answer» Correct Answer - D
With `HX(X=Cl,Br,I)` the reaction occurs via protonation. The protonated alcohol then react with `X^(-)` to from haloalkane. An alcohol does not react with `Br_(2)` because there is a no protonating agne and secondly, the extermely weak base `Br^(-)` cannot displace very strong base `OH^(-)`


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