9H Quick Quiz
1 A fuel is something that:
A releases energy when it freezes.
B takes in energy when it burns.
C gives out energy when it burns.
D gets hot on its own.
2 Charcoal is a fuel that is almost pure carbon. What is formed when charcoal burns?
A carbon dioxide and oxygen
B carbon dioxide and water
C water and oxygen
D just carbon dioxide
3 Why should burning fuels always be given plenty of air?
A If there is not enough air, carbon dioxide may form.
B The burning fuel needs carbon dioxide from the air.
C Poisonous carbon monoxide may form if there is not enough oxygen.
D The burning fuel will produce water.
4 Displacement reactions can be used to provide:
A electrical energy.
B heat energy.
C light energy.
D electrical energy or heat energy.
1 Which of these reactions does not happen in living things?
2 Which of these chemicals is made using chemical reactions in a factory?
3 New materials may be developed so that they:
A are cheaper to make.
B are more expensive.
C take longer to make.
D are more complicated to make.
4 A new drug has to be tested to:
A see if it works.
B make sure it does not harm people.
C see if it works and to make sure it does no harm.
D see how expensive it is.
1 In a chemical reaction:
A the masses of the reactants are always bigger than the masses of the products.
B the masses of the reactants are always less than the masses of the products.
C the masses of products and reactants are usually the same.
D the masses of products and reactants are always the same.
2 If you burn a piece of coal, the mass of the ashes you have left is less than the original mass of the coal because:
A carbon dioxide has been produced, which has escaped into the air.
B carbon dioxide has been absorbed from the air.
C oxygen has been produced.
D water has been absorbed from the air.
3 If you heat a piece of copper, its mass goes up because:
A it has reacted with oxygen from the air.
B metals expand when they are hot.
C heating metals produces carbon dioxide.
D mass is conserved.
4 In a chemical reaction:
A new atoms are created.
B atoms are rearranged to form different substances.
C atoms can be destroyed.
D different atoms are made.
1 Which of these fuels is not a hydrocarbon?
C natural gas
2 When hydrocarbons burn they form:
A hydrogen oxide only.
B carbon dioxide only.
C carbon dioxide and water.
D smoke only.
3 If you burn 12 g of carbon in 32 g of oxygen, how much carbon dioxide will you get?
A 12 g
B 24 g
C 32 g
D 44 g
4 Phlogiston is:
A an element that was discovered in 1772.
B an old name for oxygen.
C an imaginary substance that was thought to be taken in when things burned.
D an imaginary substance that was thought to be given off when things burned.