The equilibrium constant for equilibrium is $2H{X_{(g)}}\,\, \rightleftharpoons \,{H_{2(g)}}\, + \,{X_{2(g)}}$ is $1\, \times \,10^{-5}$. What will be the equilibrium concentration of $HX$ if the equilibrium concentrations for $H_2$ and $X_2$ are $1.2\, \times \,10^{-3}\, M$ and $1.2 \times \, 10^{-4}\, M$ respectively
→$IUPAC$ name of${H_3}C - \mathop {\mathop {CH - C{H_2}}\limits_{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} }\limits_{{C_2}{H_5}\,\,\,\,\,\,\,\,\,\,\,} - \mathop {\mathop {CH - C{H_2}Cl}\limits_{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} }\limits_{OH\,\,\,\,\,\,\,\,\,\,\,\,\,} $ is
→