What is the effect of increasing the concentration of a reactant on the rate of a second-order reaction?

A. The rate decreases
B. The rate remains constant
C. The rate increases quadratically
D. The rate increases linearly

Answer: The rate increases quadratically


Additional Information: In a second-order reaction, the rate is proportional to the square of the concentration of the reactant, leading to a quadratic increase in the rate.