Question

The half-life period of zero order reaction, A$\to$ product is given by.

• A. $\frac{[A{]}_0}{k}$
• B. $\frac{0.693}{k}$
• C. $\frac{[A{]}_0}{2k}$
• D. $\frac{2[A{]}_0}{k}$

Answer 1

Answer: (C)

$\frac{[A{]}_0}{2k}$

For zero order reaction, the half life period $t_{1/2}=\frac{[A{]}_0}{2k}$. Thus, for zero order reaction, the half life period is directly proportional to the initial concentration.

For first-order reaction, the half-life period $t_{1/2}=\frac{0.693}{k}$. Thus, for first-order reaction, the half-life period is independent of the initial concentration.