For the reaction A + 2B → C, rate is given by R = [A] [B]2 then the order of the reaction is
(a) 3
(b) 6
(c) 5
(d) 7.
(a) : Order is the sum of the power of the concentrations terms in rate law expression. R = [A] × [B]2 Thus, order of reaction = 1 + 2 = 3.