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AP EAMCET · Chemistry · Chemical Kinetics

The first order reaction \(\mathrm{A}(\mathrm{g}) \rightarrow \mathrm{B}(\mathrm{g})+2 \mathrm{C}(\mathrm{g})\) occurs at \(25^{\circ} \mathrm{C}\). After 24 minutes the ratio of the concentration of products to the concentration of the reactant is \(1: 3\). What is the half life of the reaction \((\) in \(\min ) ?(\log 1.11=0.046)\)

  1. A \(150.5\)
  2. B \(142.2\)
  3. C \(157.8\)
  4. D \(15.78\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(157.8\)

Step-by-step Solution

Detailed explanation

\(\begin{array}{llll} & \mathrm{A}(\mathrm{g}) & \rightarrow \mathrm{B}(\mathrm{g})+2 \mathrm{C}(\mathrm{g}) \\ \mathrm{t}=0 \text { min } & 100 & & \\ \mathrm{t}=24 \min & 100-\mathrm{x} & \qquad \mathrm{x} \qquad \quad 2 \mathrm{x}\end{array}\)…