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MHT CET · Chemistry · Chemical Kinetics

Rate law for the reaction \(\mathrm{aA}+\mathrm{bB} \rightarrow \mathrm{cC}+\mathrm{dD}\) is \(\mathrm{r}=\mathrm{k}[\mathrm{A}][\mathrm{B}]\). Which from following conditions does NOT affect the rate of reaction?

  1. A Concentration of \(A\) is doubled and concentration of \(B\) is kept constant.
  2. B Concentration of \(B\) is doubled and concentration of \(A\) is kept constant.
  3. C Concentration of \(B\) is doubled and concentration of \(A\) is halved.
  4. D Concentration of \(A\) is kept constant and concentration of \(B\) is halved.
Verified Solution

Answer & Solution

Correct Answer

(C) Concentration of \(B\) is doubled and concentration of \(A\) is halved.

Step-by-step Solution

Detailed explanation

Initial rate: \( \mathrm{r_0} = \mathrm{k}[\mathrm{A}][\mathrm{B}] \) For the condition "Concentration of \( \mathrm{B} \) is doubled and concentration of \( \mathrm{A} \) is halved":