When the rate of a chemical reaction remains unchanged over time, it is said to have a constant rate. In other words, the slope of the reaction curve remains the same from the beginning to the end of the reaction.
Equilibrium in a chemical reaction occurs when the forward and reverse reactions are occurring at the same rate, resulting in no net change in the concentrations of reactants and products. The reaction curve becomes a horizontal line at equilibrium.
If the slope of a reaction curve is greater near the start of the reaction, it indicates that the rate of the reaction is initially high, and then it may decrease as the reactants are consumed. This suggests a rapid initial reaction rate.
When the slope of the reaction curve is lesser near the start of the reaction, it implies that the rate of the reaction is initially low, and then it may increase as the reactants are consumed or as other factors come into play.
The correct option is C. Greater. If the slope of the curve is greater near the start of the reaction, it indicates a rapid initial reaction rate.