In the chemical reaction A B, what is the order of the reaction? Given that, the rate of reaction doubles if the concentration of A is increased four times.

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Correct answer: C. 0.5

We know, r_1=k[A]^ n ....(i) If conc. of A is increased four times rate of reaction on doubles. 2 r_1=k[4 A]^ n ....(ii) Divide Eq. (ii) by (i). 2 r_i r_1 = k(4 A)^n k(A)^n 2=(4)^ n 2 n =(2)^ 2 n n=0.5

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