Stage 9 Science - Unit 8 Revision Quiz

What does the rate of reaction measure?

• The color change that occurs during a reaction

• The total amount of product formed at the end of a reaction

• How quickly reactants are used up or products are formed

• The size of the reactants before a reaction

How does increasing the surface area of a solid reactant affect the rate of reaction?

• It decreases the reaction rate because there is less contact between reactants

• It has no effect on the reaction rate

• It increases the reaction rate by allowing more collisions to occur

• It stops the reaction from happening

Which of the following best explains why a higher temperature increases the rate of reaction?

• It provides more reactant particles

• It makes the reactants heavier

• It increases the energy and movement of the particles, leading to more collisions

• It removes excess energy from the system

What happens to the rate of reaction when the concentration of a reactant is increased?

• It decreases because there are fewer particles available to react

• It stays the same since concentration has no effect

• It increases because there are more particles to collide and react

• It stops the reaction completely

When a solid is broken into smaller pieces, its ____________ increases, leading to a faster reaction.

The rate of reaction can be measured by how quickly ____________ are formed or how fast ____________ are used up.

Before a chemical reaction, we have _____________.

• reactants

• products

After a chemical reaction, we have _____________.

• reactants

• products

Increasing temperature makes particles move ____________ and collide more often with enough energy to react

Increasing temperature makes particles move ____________ and collide more often with enough energy to react