Sample exam questions - chemical patternsFree response questions

Understanding how to approach exam questions helps to boost exam performance. Question types will include multiple choice, structured, mathematical and practical questions.

Part ofChemistry (Single Science)Chemical patterns

Free response questions

Free response questions will appear throughout both exam papers, and at both foundation tier and higher tier.

These questions include answer lines for you to write your answer on, and may sometimes also provide a blank space for you to draw a diagram or show your working out.

The number of answer lines and the number of marks for the question are good guides to the amount of detail you should include in your answer. A question worth one mark with only one answer line probably only requires a one sentence answer. For questions with more marks and more answer lines you will have to go into more detail or give specific information, eg:

  • the rate of carbon dioxide produced increased [1]
  • the rate of carbon dioxide produced increased by 2 cm3/s [2]

Free response questions often start with a command word such as 'Describe' or 'Explain'. It's important to understand the difference:

  • 'describe' - what happens, when and where
  • 'explain' - how and why it happens, eg It happens because...

Other command words you might see include:

  • 'write down' - give a short answer, without explaining it
  • 'suggest' - use your scientific knowledge and understanding to give an answer in an unfamiliar context
  • 'compare' - write about the similarities and differences between two things
  • 'discuss' - write about the issues related to a topic, and talk about arguments for and against

These questions have been written by Bitesize consultants as suggestions to the types of questions that may appear in an exam paper.

Learn about command words with Dr Alex Lathbridge

Understanding the different command words in your science GCSE exams.

Sample question 1 - Foundation

Question

Sodium is an element in group 1 of the periodic table. Sodium reacts with chlorine gas to form sodium chloride.

a central nucleus and three empty concentric circles

Complete the diagram to show the arrangement of electrons in a chloride ion. [2 marks]

Sample question 2 - Foundation

Question

Complete the word and symbol equation for the reaction between sodium and chlorine. [2 marks]

sodium + chlorine → ______

2 ______ + Cl2 → 2NaCl

Sample question 3 - Higher

Question

Sodium is an element in group 1 of the periodic table. Sodium atoms react with oxygen atoms to form sodium ions and oxide ions.

Draw a dot and cross diagram to show the arrangement of electrons and charge for a sodium ion and an oxide ion. [2 marks]

Sample question 4 - Higher

Question

Write a balanced symbol equation for the reaction between sodium and oxygen.

Include state symbols in your answer. [2 marks]