\(A+2 B \rightarrow C+D\)
The rate of the reaction is
\(\frac{-1}{1} \frac{ d [ A ]}{ dt }=\frac{-1}{2} \frac{ d [ B ]}{ dt }=\frac{+ d [ C ]}{ dt }=\frac{+ d [ D ]}{ dt }\)
$\frac{d[NH_3]}{dt} = 2 \times 10^{-4} \, mol \,L^{-1} \, s^{-1}$ હોય, તો $\frac{-d[H_2]}{dt}$ ની કિંમત ............. $mol \,L^{-1} \, s^{-1}$ થશે.