Question

For the reaction $A+2 B \longrightarrow C$, the reaction rate is doubled, if the concentration of $A$ is doubled. The rate is increased by four times when concentrations of both $A$ and $B$ are increased by four times. The order of the reaction is

• A. 3
• B. 0
• C. 1
• D. 2

Answer 1

Answer: (C)

Rate of reaction is doubled when concentration of A is doubled. Again, rate of reaction becomes four times when concentration of $A$ is increased by four times. It is clearly shown that there is no effect on rate of reaction on increasing the concentration of $B$.
Thus, order with respect to $A$ is 1 and order with respect to $B$ is $0 .$ Total order of reaction $=1$.