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Worksheets9C3 Topic Quiz
Total questions: 15
Worksheet time: 11mins
During an exothermic reaction, heat is _________ and chemical bonds __________.
released, formed
absorbed, broken
released, broken
absorbed, formed
copper(II)carbonate → ___________ + carbon dioxide
copper(I) oxide
copper(II) oxide
copper oxide
copper(III) oxide
Why does thermal decomposition need heat energy
to make magic
to break bonds
to make water
to work as a catalyst
The graph above is from which type of reaction?
Endothermic reaction
Exothermic reaction
What are the two REACTANTS in a combustion reactions?
Methane and Carbon Dioxide
Fuel and Oxygen
Carbon Dioxide and Water
Fuel and Carbon Dioxide
Which of the following are NOT examples of an Exothermic Reaction?
Respiration
Photosynthesis
Rusting
Neutralisation
What is another name for burning?
Neutralisation
Combustion
Thermal decomposition
Displacement
The word equation for combustion is: fuel + oxygen --> water + ________ __________
Carbon dioxide
Limewater
Carbon monoxide
Water vapour
A thermal decomposition reaction can be represented as _____________________.
What happens when CO2 is bubbled through limewater
It changes from pink to blue
It goes pop
It goes cloudy
It gets hot
What three things are needed for combustion to take place?
Heat, Oxygen, Water
Fuel. Heat, Carbon dioxide
Fuel, heat, oxygen
Catalyst, fuel, carbon monoxide
