MCQ
Lucas reagent is
- ✓Concentrated $HCl + {\rm{anhydrous }}ZnC{l_2}$
- BDilute $HCl + {\rm{ hydrated }} \, ZnC{l_2}$
- CConcentrated $HN{O_3} + {\rm{ anhydrous }} \, ZnC{l_2}$
- DConcentrated $HCl + {\rm{ anhydrous }} \, MgC{l_2}$
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$\begin{array}{*{20}{c}}
{C{H_3}C{H_2}CH - C{H_2}} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Br\,\,\,\,\,\,\,\,\,Br\,\,}
\end{array}\xrightarrow[\begin{subarray}{l}
(ii)\,NaN{H_2} \\
in\,liq.\,N{H_3}
\end{subarray} ]{{(i)\,KOH\,alc.}}$

[Use : $\ln\, 2=0.69, \ln \,10=2.3]$