Chemistry - Chemical Kinetics Question with Solution | TestHub

The correct option is (A). Here is the step-by-step solution for the zero-order reaction $E(g)+F(g)\to G(g)$:

For Graph (P): When initial moles are equal ($E_0=F_0$), the mole ratio is $\frac{E}{F}=\frac{E_0-kt}{E_0-kt}=1$, which remains constant over time. This gives (P) $\to$ (1).

For Graph (Q): When $E_0>F_0$ ($F$ is the limiting reagent), the initial intercept is $>1$, and the ratio $\frac{E}{F}$ increases non-linearly towards infinity as $F\to 0$. This gives (Q) $\to$ (4).

For Graph (R) & (S): Graph (R) has an initial intercept $<1$, matching descriptor (2). Since (A) uniquely matches P $\to$ 1 and Q $\to$ 4, it is the only correct choice.