Question

Assertion : The molecularity of the reaction H2 + Br2 = 2HBr is two.

Reason : The order of this reaction is 3/2.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

Answer 1

Correct option (b) Both A and R are true but R is not correct explanation of A

Explanation

Molecularity of reaction is the no. of molecules acting in the rate determing step while order of reaction is the sum total of all powers to which concentration are raised in the rate law expression. So both may or may not be same.