Question

For a chemical reaction $A \rightarrow B$ it is found that the rate of reaction doubles, when the concentration of A is increased four times. The order in A for this reaction is.

• A. Two
• B. One
• C. Half
• D. Zero

Answer 1

Answer: (C)

Half

Answer 2

$r = K\lbrack A\rbrack^{m}$ also $2r = K\lbrack 4A\rbrack^{m}$, $\frac{1}{2} = \left( \frac{1}{4} \right)^{m}$

$\therefore m = \frac{1}{2}$ .