For a reaction A -> product, doubling the concentration of A, quadruples the rate. The reaction is :
Correct answer: B. Second order
- A. First order
- B. Second order
- C. Zero order
- D. Third order
Explanation
If doubling the concentration of A, quadruples the rate, the reaction is second order with respect to A. This means that the rate of the reaction is proportional to the square of the concentration of A.The rate equation for a second-order reaction with respect to A is: rate = k[A]2.In this case, if the concentration of A is doubled, the rate of the reaction will be quadrupled. This is because the square of 2 is 4 ,hence this is the correct answer.
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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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