A reaction is first order with respect to A and second order with respect to B, the rate equation is
Correct answer: A. rate = [A] [B]2
- A. rate = [A] [B]2
- B. rate = k [A]2[B]
- C. rate = k [A] [B]
- D. rate = k [A]
Explanation
In this option the rate of the reaction is proportional to the product of the concentrations of A and B raised to the power of 2. This means that the rate of the reaction will increase as the concentration of A increases, and it will increase even more as the concentration of B increases.For example, if the concentration of A is doubled, the rate of the reaction will double. If the concentration of B is doubled, the rate of the reaction will quadruple ,hence the rate equation given in option 'a' suggests that reaction is of first order w.r.t A and of second order w.r.t B which matches the condition given in the question and is the correct answer.
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About Reaction Kinetics
Reaction kinetics relates reaction rate to concentration, temperature, surface area and catalysts. Questions cover rate laws, reaction order, rate constants, activation energy and the activated complex, including how a catalyst lowers the activation energy without changing the overall energy change or equilibrium position.
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