Chemical Kinetics · Class 12 · CBSE · Science Chemistry

For a chemical reaction A rightarrow B, the rate of the reaction increases by a factor of 8 when the concentration of A is doubled. The order of the…

Practice question from Chemical Kinetics (Class 12 · CBSE · Science Chemistry), with the correct answer and a step-by-step solution.

easy · MCQ · Q-9CBA88

For a chemical reaction A→BA \rightarrow B, the rate of the reaction increases by a factor of 8 when the concentration of AA is doubled. The order of the reaction with respect to AA is:

  1. A.1
  2. B.2
  3. C.3Correct answer
  4. D.0

Solution

Rate =k[A]n= k[A]^n. Given that when [A][A] is doubled, rate increases by 8 times. So, 8=(2)n8 = (2)^n, which gives n=3n = 3.

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