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 (a)   increases, leading to a faster reaction.

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

(a)  

Before a chemical reaction, we have _____________.

• reactants

• products

After a chemical reaction, we have _____________.

• reactants

• products

Increasing temperature makes particles move (a)   and collide more often with enough energy to react

Increasing temperature makes particles move (a)   and collide more often with enough energy to react