In a $\mathrm{CSTR}$, a homogeneous reaction's first-order of the type $\mathrm{X}\to \mathrm{Y}\to \mathrm{Z}$ (consecutive reaction) is carried out. Among the following, which curve shows a variation of concentration of $\mathrm{X}, \mathrm{Y}$and $\mathrm{Z}$with time?

A substance undergoes a first-order decomposition. The decomposition follows two parallel first-order reactions as given below.

The percentage distributions of $\mathrm{B}$ and $\mathrm{C}$ are

(${\mathrm{k}}_1=1.26\times {10}^{-4} {\mathrm{s}}^{-1}$ and ${\mathrm{k}}_2=3.8\times {10}^{-5} {\mathrm{s}}^{-1}$)

Consider the elementary reaction sequence shown in the figure. Among the following equations, which one is correct?

Consider the decay of $\mathrm{P}$ to $\mathrm{A}$ and $\mathrm{B}$ by two parallel first-order reactions as shown in the figure

Which of the following is (are) true?

The rate expression for the reaction,

${\mathrm{NH}}_4\mathrm{CNO}\stackrel{\mathrm{k}}{\to }{\mathrm{NH}}_2{\mathrm{CONH}}_2$

can be derived from the mechanism,

$\left(\mathrm{i}\right)$ ${\mathrm{NH}}_4\mathrm{CNO}\underset{{\mathrm{k}}_2}{\overset{{\mathrm{k}}_1}{\rightleftharpoons }}{\mathrm{NH}}_4\mathrm{NCO} \left(\mathrm{Fast}\right)$

$\left(\mathrm{ii}\right)$ ${\mathrm{NH}}_4\mathrm{NCO}\stackrel{{\mathrm{k}}_3}{⟶}{\mathrm{NH}}_3+\mathrm{HNCO} \left(\mathrm{Fast}\right)$

$\left(\mathrm{iii}\right)$ ${\mathrm{NH}}_3+\mathrm{HNCO}\stackrel{{\mathrm{k}}_4}{⟶}{\mathrm{NH}}_2{\mathrm{CONH}}_2 \left(\mathrm{Slow}\right)$

Which of the following statements are correct about rate expression?