$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH} ightarrow \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{Cl}$
Find out number of reagents that can be used for above transformation from following
$\mathrm{HCl} / \mathrm{ZnCl}_{2}, \mathrm{P}+\mathrm{Cl}_{2} / \Delta, \mathrm{SOCl}_{2}, \mathrm{TsCl}, \mathrm{NaCl}, \mathrm{PCl}_{3}, \mathrm{PCl}_{5}$, $\mathrm{AgCl}$
4
5
7
9
Solution
$\mathrm{HCl/ZnCl}_{2}, \mathrm{P} + \mathrm{Cl}_{2}, \mathrm{SOCl}_{2}, \mathrm{PCl}_{3}$ and $\mathrm{PCl}_{5}$.
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