Chemistry - Chemical Kinetics Question with Solution | TestHub

The reaction of hydrogen and iodine monochloride is given as: ${\mathrm{H}}_{2(g)}+2{\mathrm{ICl}}_{(g)}\to 2{\mathrm{HCl}}_{(g)}+{\mathrm{I}}_{2(g)}$ This reaction is of first order with respect to ${\mathrm{H}}_{2(g)}$ and ${\mathrm{lCl}}_{(g)+}$ following mechanisms were proposed Mechanism A: ${\mathrm{H}}_{2(g)}+2{\mathrm{ICl}}_{(g)}\to 2{\mathrm{HCl}}_{(g)}+{\mathrm{H}}_{2(g)}$ Mechanism B: $\begin{array}{rl}& {\mathrm{H}}_{2(g)}+{\mathrm{ICl}}_{(g)}\to {\mathrm{HCl}}_{(g)}+{\mathrm{HI}}_{(g)}\text{ :slow }\\ & {\mathrm{Hl}}_{(g)}+{\mathrm{lCl}}_{(g)}\to {\mathrm{HCl}}_{(g)}+{\mathrm{l}}_{2(g)}\text{; fast }\end{array}$ Which of the above mechanism(s) can be consistent with the given information about the reaction?NEET 2007