For the reaction `H_(2)(g) + Br_(2)(g) rarr 2HBr (g)` the experimental data suggested that `r = k[H_(2)][Br_(2)]^(1//2)`
The molecularity and order of the reaction are respectively:

Options

A. `2, 3//2`
B. `3//2, 3//2`
C. Not defined, `3//2`
D. `1, 1//2`

Answer

C

Explanation

`H_(2)(g) + Br_(2) (g) rarr 2HBr(g)`
`r = K[H_(2)][Br_(2)]^(1//2)`
Molecularity rarr not defined, (`because` complete reaction)
order `= 1 + (1)/(2) =(3)/(2)`