Question

A + 2B → C + D For a reaction from following data correct rat law =

(a)  Rate = K [A]²[B]

(b)  Rate = K [A]² [B]²

(c)  Rate = K [A][B]² 

(d)  Rate = K [A][B]

Answer 1

Correct option (c) Rate = K [A]² [B]²

Explanation:

Rate = K[A][B]²

Keeping [B] constant, [A] is made a 4 times, rate also become 4 times. 

Hence rate α [A]

Keeping [A] constant, [B] is doubled, rate becomes 4 times. Hence rate α [B]²

∴ rate = K[A][B]²