For a reaction, X → Y, if the concentration of 'X' is tripled; the rate becomes nine times. The order of reaction is__________________?
Correct answer: C. 2
- A. 0
- B. 1
- C. 2
- D. 3
Explanation
For a rate law r = kCⁿ, tripling concentration changes the rate by 3ⁿ. Since the rate becomes 9 times greater, 3ⁿ = 9 = 3², so the reaction is second order.
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