$[$આપેલ છે :${R}=8.31\, {~J} \,{~K}^{-1} \,{~mol}^{-1} ; \log 6.36 \times 10^{-3}=-2.19$ $\left.10^{-4.79}=1.62 \times 10^{-5}\right]$
${I_2}\,\underset{{{K_{ - 1}}}}{\overset{{{K_1}}}{\longleftrightarrow}}\,2I\,$ (fast step)
$2I + {H_2}\xrightarrow{{{K_2}}}2HI$ (slow step)
તો પ્રક્રિયાનો વેગનિયમ જણાવો.