Question

The time for half change of a reactant in a zero order reaction is:

• A. proportional to the initial concentration
• B. proportional to the square root of the initial concentration
• C. independent of initial concentration
• D. inversely proportional to the initial concentration

Answer 1

Answer: (A)

proportional to the initial concentration

For $n^{th}$ order, $t_{\frac{1}{2}}=\frac{1}{a^{n-1}}$.
For a zero order reaction, $n=0$,
$t_{\frac{1}{2}}\propto \frac{1}{a^{-1}}$
$t_{\frac{1}{2}}\propto a$