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BITSAT 2024Paper 2
Exam
BITSAT
Year
2024
Paper
Paper 2
Subject
Chemistry
Chapter
Chemical Kinetics

BITSAT 2024 · Paper 2 · Chemistry · Chemical Kinetics

In the chemical reaction A arrow B , what is the order of the...

In the chemical reaction A→BA \rightarrow B, what is the order of the reaction? Given that, the rate of reaction doubles if the concentration of AA is increased four times.

Options

  1. A22
  2. B1.51.5
  3. C0.50.5
  4. D11

Correct answer

C. 0.50.5

Step-by-step solution

We know, r1=k[A]nr_1=k[A]^{\mathrm{n}}....(i) If conc. of AA is increased four times rate of reaction on doubles. 2r1=k[4A]n2 r_1=k[4 A]^{\mathrm{n}}....(ii) Divide Eq. (ii) by (i). 2rir1=k(4A)nk(A)n⇒2=(4)n⇒2n=(2)2n⇒n=0.5\frac{2 r_i}{r_1}=\frac{k(4 A)^n}{k(A)^n}\Rightarrow \quad 2=(4)^{\mathrm{n}} \Rightarrow 2 \mathrm{n}=(2)^{2 \mathrm{n}} \Rightarrow n=0.5
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