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Chemical Kinetics question

2009 · Q101
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Chemical Kinetics question

2009 · Q101

NEETChemistryChemical KineticsMCQ+4 / −1
For the reaction A + B →\to→ products, it is observed that

(i)  on doubling the initial concentration of A only, the rate of reaction is also doubled and
(ii)  on doubling the initial concentration of both A and B, there is a change by a factor of 8 in the rate of the reaction.

The rate of this reaction is given by
  1. A
    rate = k[A]2 [B]2
  2. B
    rate = k[A] [B]2
  3. C
    rate = k[A] [B]
  4. D
    rate = k[A]2 [B]
View written solutionFree

Correct answer: B

R = k[A]m[B]n ... (i)

2R = k[2A]m[B]n ... (ii)

8R = k[2A]m[2B]n ... (iii)

from (i), (ii) and (iii), m = 1, n = 2

So, rate = k[A][B]2

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