One-mark questions often ask you to state, predict, or give a simple reason to explain something. You do not have to answer in a full sentence, but it is usually a good idea to do so, in case that helps to give your answer more depth which might help you to score the mark. Make sure that you include key words in your answer, as these are often required by the mark scheme.
Foundation tier papers may include questions in which you have to draw lines to match correct options. These questions will include incorrect choices.
When you answer a link box question, draw the number of lines needed to answer the question.
These questions have been written by Bitesize consultants as suggestions to the types of questions that may appear in an exam paper.
Name one type of chemical reaction that is exothermic. [1 mark]
Combustion or neutralisation 
A student investigated energy changes in the reactions of metals with solutions of metal chlorides.
The measuring instruments below are available:
Which of these measuring instruments would be best for measuring the following variables.
a) Mass of metal powder
b) Volume of metal chloride solution [2 marks]
a) Balance 
b) Measuring cyclinder 
The equation below shows the chemical reaction between nitrogen and oxygen.
The reaction occurs at high temperatures in car engines.
N2(g) + O2(g) → 2NO(g)
Calculate the energy needed to break the bonds in the reactants.
Use data from table 1
|Bond||Bond energy in kJ/mol|
Energy needed = 944 kJ/mol + 498 kJ/mol
= 1442 kJ/mol 
The chemical reaction of propane, C3H8, with oxygen is exothermic.
Write down what the statement above tells you about the energy involved in breaking and making chemical bonds in the reaction. [1 mark]
The energy released from forming new bonds in the products is greater than the energy needed to break bonds in the reactants (propane and oxygen).