Question:medium

First order gas phase reaction \(A \to B + C\). \(p_i = \text{initial pressure of gas A}\), \(P_t = \text{total pressure of the reaction mixture at time t}\). Expression of rate constant (k) is

Updated On: Apr 12, 2026

\(\frac{1}{t} \ln \frac{p_i}{2p_i - P_t}\)
\(\frac{1}{t} \ln \frac{2p_i}{p_i - P_t}\)
\(\frac{1}{t} \ln \frac{p_i}{3p_i - 2P_t}\)
\(\frac{1}{t} \ln \frac{3p_i}{4p_i - P_t}\)

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The Correct Option is A

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