we know
$k = \frac{{2.303}}{t}\log \frac{a}{{a - x}} = \frac{{2.303}}{{200}}\log \frac{{2.00}}{{0.15}}$
$ = \frac{{2.303}}{{200}} \times (0.301 + 0.824) = 1.29 \times {10^{ - 2}}\,{\min ^{ - 1}}$

| Run | $[A]/mol\,L^{-1}$ | $[B]/mol\,L^{-1}$ | $D$ ઉત્પન્ન થવાનો શરૂઆતનો દર $mol\,L^{-1}\,min^{-1}$ |
| $I.$ | $0.1$ | $0.1$ | $6.0 \times 10^{-3}$ |
| $II.$ | $0.3$ | $0.2$ | $7.2 \times 10^{-2}$ |
| $III.$ | $0.3$ | $0.4$ | $2.88 \times 10^{-1}$ |
| $IV.$ | $0.4$ | $0.1$ | $2.40 \times 10^{-2}$ |
ઉપરની વિગત પરથી નીચેનામાંથી ક્યું સાચુ છે ?
(આપેલ : $\ln 10=2.303\,\log 2=0.3010$ )