Rates of reaction quiz, Chemistry grades 9-10 (free)

Quick answer: The rate of reaction is how quickly reactants are used up or products form, measured as amount per unit time. This Chemistry 9-10 quiz checks rates of reaction with 10 multiple-choice questions and instant feedback; every answer comes with a short explanation.

Rates of reaction quiz for GCSE chemistry: 10 questions with answers

This rates of reaction quiz for chemistry grades 9-10 has quick multiple-choice questions with instant feedback. Need a refresher first? Read the lesson or do the worksheet on rates of reaction.

Choose the best answer for each of the ten questions. Several wrong options are common ideas students bring from everyday life, so think about particles and collisions before answering.

Level: Chemistry grades 9-10 (GCSE · IGCSE · O Level · Class 9-10) · Curriculum: HS-PS1-5

Contents

Rates of reaction quiz: the questions

What does a steeper line on a gas volume-time graph show?

What is the minimum energy colliding particles need to react?

Why does a higher concentration increase the rate?

Which change has the main effect through the energy of the particles?

A solid is crushed into powder. What is the effect on the rate?

What does a catalyst do to the activation energy?

What happens to a catalyst at the end of the reaction?

A reaction makes 90 cm³ of gas in 30 s. What is the mean rate?

A reaction takes 60 s at 20 °C. If the rate doubles every 10 °C, how long at 30 °C?

Why does the gas volume graph level off?

What is the rate of reaction? — Amount of product formed or reactant used per time

What does collision theory say? — Particles must collide with enough energy to react

Name the four main factors that change rate. — Temperature, concentration, surface area, catalyst

Why does powder react faster than lumps? — Larger surface area, more collisions

What is a catalyst? — A substance that speeds up a reaction and is not used up

How does a catalyst work? — Lowers the activation energy

Unit of rate for a gas volume? — cm³/s

Effect of raising pressure on a gas reaction? — More particles per volume, higher rate

What is shown by the gradient of a graph? — The rate of reaction

Why does the curve flatten? — Reactants have been used up

Rates of reaction quiz for GCSE chemistry: 10 questions with answers

Rates of reaction quiz: the questions