Chemical Reactions and Equilibrium Quiz

What does the Collision Theory state about the requirements for a chemical reaction to occur?

• Molecules must collide with correct orientation and sufficient energy.

• Reactants must be in a solid state.

• Ions must be in a gaseous state.

• Atoms must be in a liquid state.

What is the term for the minimum energy required to initiate a chemical reaction?

• Kinetic energy

• Potential energy

• Thermal energy

• Activation energy

In an exothermic reaction, how does the energy of the products compare to the reactants?

• Products have less energy than reactants.

• Products have more energy than reactants.

• Products have the same energy as reactants.

• Energy levels are irrelevant.

Which factor increases the likelihood of collisions between reactant particles?

• Decreasing temperature

• Using larger reactant particles

• Decreasing concentration

• Increasing surface area

How does increasing temperature generally affect the rate of a chemical reaction?

• It stops the reaction completely.

• It increases the rate of reaction.

• It decreases the rate of reaction.

• It has no effect on the rate of reaction.

What role do catalysts play in chemical reactions?

• They increase the activation energy required.

• They decrease the activation energy required.

• They are consumed in the reaction.

• They prevent the reaction from occurring.

What is an example of a catalyst in the human body?

• Glucose

• Lactose

• Sucrose

• Lactase

What is the effect of inhibitors on chemical reactions?

• They speed up reactions.

• They increase the energy of products.

• They slow down reactions.

• They have no effect on reactions.

What is the term for a reaction that can proceed in both forward and reverse directions?

• Non-spontaneous reaction

• Spontaneous reaction

• Reversible reaction

• Irreversible reaction

What does chemical equilibrium mean in terms of reaction rates?

• Reactants and products are in equal amounts.

• Forward and reverse reaction rates are equal.

• Reverse reaction rate is zero.

• Forward reaction rate is zero.