S

Shyam Dubey • 3.70K Points
Extraordinary

Q. For the reaction 2A → products, the rate law is rate = k[A]^2. What is the order of the reaction with respect to A and overall?

  • (A) First order with respect to A; overall first order
  • (B) Second order with respect to A; overall second order
  • (C) Zero order with respect to A; overall zero order
  • (D) Second order with respect to A; overall first order
  • Correct Answer - Option(B)
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  • Filed under category Chemistry
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Explanation by: Shyam Dubey
The exponent of [A] in the rate law gives the order with respect to A: it's 2, so second order in A. Since there's only A in the rate law, the overall order is also 2. Option 1 is wrong because the exponent is not 1. Option 3 is wrong because zero order would have [A]^0. Option 4 is inconsistent (can't be second in A and overall first).

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