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Question
The correct sequence of reagents used in the preparation of 4-bromo-2-nitroethyl benzene from benzene is :
$C{H_3}COCl/AlC{l_3},B{r_2}/AlB{r_3},HN{O_3}/{H_2}S{O_4},Zn/HCl$
$C{H_3}COCl/AlC{l_3},Zn - Hg/HCl,B{r_2}/AlB{r_3},HN{O_3}/{H_2}S{O_4}$
$B{r_2}/AlB{r_3},C{H_3}COCl/AlC{l_3},HN{O_3}/{H_2}S{O_4},Zn/HCl$
$HN{O_3}/{H_2}S{O_4},B{r_2}/AlC{l_3},C{H_3}COCl/AlC{l_3},Zn - Hg/HCl$

Solution

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