$C{l}_2$disproportionates into $C{l}^{-}andCl{O}_3^{-}$ in alkali. What can we conclude ?

$3C{l}_2+6O{H}^{-}\to 5C{l}^{-}+Cl{O}_3^{-}+3H_{2}O$

            $\frac{5^{th}}{6}$parts (5 chlorine out of 6) of chlorine is reduced

            Eq. wt of oxidized chlorine is 7.1

            Eq. wt of reduced chlorine is 35.5