Multiple choice

In the reaction aA + bB +cC → products, following observations are made. I - if concentration of A is doubled, keeping the concentration of B and C constant, the rate of reaction becomes double. II - if the concentration of B is halved, keeping the concentration of A and C constant the rate of reaction remains unaffected. III - If concentration of C is made 1.5 times, the rate of reaction becomes 2.25 times. The order of reaction is

  1. 1

  2. 2.5

  3. 3

  4. 3.5
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C Correct answer
Explanation

The answer can be calculated as follows: From observation 1, we observe that reaction is 1st order with respect to A. From observation 2, we observe,that reaction is zero order with respect to B. From observation 3, we observe that reaction is 2nd order with respect to C.Hence in total the reaction is of 3rd order.

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