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Chemical Kinetics and Nuclear Chemistry question

2002 · Shift 0 · Q38
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Chemical Kinetics and Nuclear Chemistry question

2002 · Shift 0 · Q38

JEE MainChemistryChemical Kinetics and Nuclear ChemistryMCQ+4 / −1
For the reaction A + 2B →\to→ C, rate is given by R = [A] [B]2 then the order of the reaction is
  1. A
    3
  2. B
    6
  3. C
    5
  4. D
    7
View written solutionFree

Correct answer: A

  1. Given rate law

    For the reaction A+2B→CA + 2B \to CA+2B→C the rate is given as R=[A][B]2R = [A][B]^2R=[A][B]2

  2. Definition of order of reaction

    The overall order of a reaction is the sum of the powers of concentration terms in the rate law.

  3. Identify powers

    In R=[A][B]2R = [A][B]^2R=[A][B]2

    • Power of [A][A][A] is 111
    • Power of [B][B][B] is 222

  4. Add them

    Order=1+2=3\text{Order} = 1 + 2 = 3Order=1+2=3

  5. Check options

    • A: 333 ✅
    • B: 666 ❌
    • C: 555 ❌
    • D: 777 ❌

Therefore, the order of the reaction is 333.

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