Factors affecting rate of reaction-

1) Temperature (increasing temperature increases rate of reaction)

2) Concentration or pressure of reactants. (Increasing concentration or pressure increases rate of reaction)

3) Presence or absence of a catalyst. (Adding catalyst mostly increases the rate of reaction)

4) The surface area of solid reactant. (If reaction is processing over solid reactant then increasing its surface area increases rate of reaction)

5) Nature of reactants