Question

For the reaction, $H_2\left(g\right)+{Br}_2\left(g\right)\to 2HBr\left(g\right)$, the reaction rate is:
Rate $=k\left[H_2\right]{\left[{Br}_2\right]}^{1/2}$
Which one of the following statement(s) is/are false for this reaction?

• A. The reaction is of second order
• B. The molecularity of the reaction is $3/2$
• C. The unit of $k$ is ${sec}^{-1}$
• D. All of the above

Answer 1

The correct option is D All of the above

Using $V=k\left[H_2\right]{\left[{Br}_2\right]}^{1/2}$
We find that rate is first order so unit of $k$ is ${sec}^{-1}.$
From the reaction we can see that molecularity is $3/2.$