Question

Which of the following statement is true for the reaction,
H₂ + Br₂ → 2HBr . The rate law is dx/dt = k[H₂][Br₂]¹/²
(a) order of reaction is 1.5
(b) molecularity of the reaction is 2
(c) by increasing the concentration of Br₂ four times the
rate of reaction is doubled
(d) all the above are correct.

Answer 1

All of above are correct...

because

Order of reaction =1+1/2=1.5

Molecularity=1+1=2

Dx/dt directly proportional to {br}^1/2

So, reaction rate will be doubled if concentration of Br2 is increased by 44 times.