Question

Which of the following are the correct representations of a zero order reaction, where A represents the reactant?

• A. a, b, c
• B. a, b, d
• C. b, c, d
• D. a, c, d

Answer 1

Answer: (B)

a, b, d

The graphs a, b, d are the correct representations of a zero-order reaction, where A represents the reactant.

For a zero order reaction, rate $=k[A{]}^0=k=$ constant. Hence, the graph of rate vs $\left[A\right]$ is a straight line parallel to [A] axis.

Also, $[A{]}_t=-kt+[A{]}_0$

The plot of $[A{]}_t$ vs time (t) is a straight line with a negative slope.

Slope $=-k$

The half life period $t_{1/2}=\frac{[A{]}_0}{2k}$

The graph of $t_{1/2}$ with $[A{]}_0$ is a straight line with positive slope. The slope is $\frac{1}{2k}$