Raising
the temperature of the reactants increases the reaction between the reactants. The
kinetic energy of the molecules of the reactants collides more frequently with
ach other thereby increasing its reaction. Increasing the concentration of the reactants
increases the reaction rate. Adding a catalyst to the reaction increases the
rate of reaction of a substance. The catalyst hastens the chemical reaction. Decreasing
surface area of a solid reactant slows down the reaction rate. This is because
there is lesser contact of the solvent reactant to the surfaces of the solid. So the answer is letter B.
