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KCET2013ChemistryChemical Kinetics

Temperature coefficient of a reaction is 2 . When temperature is increased from 30^ C to 90^ C , the rate of reaction is increased by

Options

  1. A60 times
  2. B64 times
  3. C150 times
  4. D400 times

Correct answer

B. 64 times

Step-by-step solution

Temperature coefficient (n)= Rate constant at T+10^ C Rate constant at T^ C =2 i.e., For each 10^ C rise in temperature, rate becomes two times for the reaction array cc Temperature & Rate of reaction 30^ C & R₁ 40^ C & 2 R₁ 50^ C & (2)² R₁ 60^ C & (2)³ R₁ 70^ C & (2)⁴ R₁ 80^ C & (2)⁵ R₁ 90^ C & (2)⁶ R₁ array Rate of reacation at 90^ C will become (2)⁶=64 times.

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