For the chemical reaction: A → products, the rate of disappearance of A is given by rA = -dCA/dt = K1 CA / (1 + K2 CA). At low concentration of A, CA, the reaction is of the first order with the rate

Question

For the chemical reaction: A → products, the rate of disappearance of A is given by rA = -dCA/dt = K1 CA / (1 + K2 CA). At low concentration of A, CA, the reaction is of the first order with the rate constant

Prashant Kotian · Accepted Answer

Correct answer: B. At low concentrations of A, K2 CA << 1, so the denominator (1 + K2 CA) approaches 1. The rate expression simplifies to rA = K1 CA, which represents a first-order reaction with rate constant K1. Therefore, correct answer is B.

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