Chapter U5.13, Problem 11E

Interpretation Introduction

Interpretation: The factors that affect the rate of reaction are to be chosen from the given options.

Concept introduction: Rate of a reaction is the speed at which a reaction takes place. There are many factors that affect the rate of a chemical reaction, such as, temperature, concentration, surface area etc.

Answer to Problem 11E

Option (D) is correct.

Explanation of Solution

If both the reactants are gases then the reaction is fast because gases mix on a molecular scale that results more contact between reactants. If both the reactants are solid then the reaction is slow because they their mixing is not much as gases. So, phases of reactants affect the rate of reaction. Hence, option (A) is correct.

Increasing temperature results increase of the average kinetic energy of reactant molecules. This results the rapid movement of particles and hence more collision occurs. So, increasing temperature of reactants increases rate of reaction. Hence, option (B) is correct.

Catalyst is a substance that increases the rate of reaction without getting consumed in the reaction. So, presence of catalyst increases rate of reaction. Hence, option (C) is correct.

Option D is ‘all of the above’ that is, A, B and C are all correct.

Conclusion

Many factors affect the rate of chemical reaction, such as, concentration, temperature, catalyst etc.