The equivalent weight of Cl in HCl is

 Equivalent weight of $\mathrm{Cl}=\frac{\mathrm{Atomic} \mathrm{weight} \mathrm{of} \mathrm{Cl}}{\mathrm{Valency} \mathrm{of} \mathrm{Cl}}=\frac{35.5}{1}=35.5$

Note: The valency of Cl is 1.