Question

For the reaction,

$H_2\left(g\right)+{Cl}_2\left(g\right)⟶2HCl\left(g\right)$

The experimental data suggests,
$r=k\left[H_2\right]{\left[{Cl}_2\right]}^{1/2}$

The molecularity and order for the reaction is:

• A. $2$ and $2\frac{1}{2}$
• B. $1\frac{1}{2}$ and $0$
• C. $1\frac{1}{2}$ and $2$
• D. $2$ and $2$

Answer 1

Answer: (A)

$2$ and $2\frac{1}{2}$

Molecularity of the reaction $=2$
Order of the reaction $=1+\frac{1}{2}$
$=2\frac{1}{2}$

Hence, the correct option is $A$.