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Questions  >>  JEEMAIN and NEET  >>  Chemistry  >>  Halogens
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Q)

The following method can not be considered suitable for the lab preparation of alkyl halide:

$\begin {array} {1 1} (A)\;\text{Halogenation of alkane} & \quad (B)\;\text{$ROH$ and $PX_3$} \\ (C)\;\text{$ROH$ and $HX$} & \quad (D)\;\text{Alkene and $HX$} \end {array}$

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A)
$R-H + X_2 \quad\underrightarrow{High temp. 400^0 /UV light}\quad R-X + HX $
This is a drastic method as it requires high temperature or catalyst $CuCl_2,\: F eCl_3\: or\: F eBr_3$
B,C,D are very feasible processes, so can be performed in the laboratories.
Ans : (A)
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