Question

If the initial concentration of the reactant is doubled, time for half reaction is also doubled; the order of reaction is ______.

Options

• zero

• first

• second

• third

Answer 1

If the initial concentration of the reactant is doubled, time for half reaction is also doubled; the order of reaction is zero.

Explanation:

For a zero-order reaction, the half-life is directly proportional to the initial concentration:

`t_(1//2) = [A]_0/(2 k)`

So, if the initial concentration is doubled, the half-life also doubles, indicating a zero-order reaction.