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Chemical Kinetics question

2023 · Q88
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Chemical Kinetics question

2023 · Q88

NEETChemistryChemical KineticsMCQ+4 / −1

For a certain reaction, the rate =k[A]2[ B]=\mathrm{k}[\mathrm{A}]^{2}[\mathrm{~B}]=k[A]2[ B], when the initial concentration of A is tripled keeping concentration of B\mathrm{B}B constant, the initial rate would

  1. A
    increase by a factor of six
  2. B
    increase by a factor of nine
  3. C
    increase by a factor of three
  4. D
    decrease by a factor of nine
View written solutionFree

Correct answer: B

Rate $$=k[A]^{2}[\mathrm{~B}]$$

If $[A]$ is tripled and $[B]$ is kept constant.

$r^{1}=k[3 A]^{2}[B]$

$r^{1}=9 k[A]^{2}[B]$

$r^{1}=9 r$

Increased by a factor of nine

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