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Q.

For the reaction 2A + B → C + D, measurement of rule of reaction at varying concentrations are given below

Exp. no.(A)(B)Rate      (m mole lit-1 sec-1)
10.0100.0102.5
20.0100.0205.0
30.0300.02045.0

The rate law is therefore 

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a

Rate = k[A]2[B]

b

Rate = k[A][B]2

c

 Rate = k[A][B]

d

 Rate = k[A]2[B]2

answer is A.

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Detailed Solution

 Rate  =  k (A)m(B)n   2.5 =  k(0.01)m (0.01)n  ------- 1 5.0 =  k(0.01)m (0.02)n   ------- 2  45 =  k(0.03)m (0.02)n -------- 3  On solving,  m = 2, n = 1

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