Chemical Kinetics - SS2 Chemistry Past Questions and Answers - page 2

Temperature

Concentration of reactants

Surface area

All of the above

Temperature decreases

Concentration of reactants decreases

Surface area decreases

None of the above

Catalysts are consumed during a reaction.

Catalysts lower the activation energy of a reaction.

Catalysts increase the rate of a reaction.

All of the above.

Measuring the change in concentration of reactants over time.

Observing the colour change of the reaction mixture.

Measuring the production of gas or heat during the reaction.

All of the above.

Reactions can only occur when reactant particles collide with sufficient energy.

All collisions between reactant particles result in a chemical reaction.

Temperature has no effect on the rate of a reaction.

The rate of a reaction is directly proportional to the concentration of reactants.

Temperature and activation energy.

Concentration of reactants.

Surface area of the reactants.

Pressure of the reactants.

Exothermic reactions release heat to the surroundings.

Exothermic reactions have higher activation energy than endothermic reactions.

Exothermic reactions always occur at a fast rate.

Exothermic reactions always produce gases.

Directly proportional to the concentration of the reactants.

Inversely proportional to the concentration of the reactants.

Independent of the concentration of the reactants.

Proportional to the square of the concentration of the reactants.

Increasing the temperature.

Adding a catalyst.

Decreasing the concentration of reactants.

Increasing the surface area of the reactants.