WorksheetsL4 Summer
Total questions: 46
Worksheet time: 30mins
Which is the correct definition for an element?
A substance made up of only one type of atom
Two or more substances that are not chemically combined
Two or more different atoms that are chemically joined
What is the missing word? The properties of a compound are __________ the elements it is made up of.
the same as
different to
Which elements are present in H2SO4?
hydrogen and oxygen
hydrogen, sodium and oxygen
hydrogen, sulfur and oxygen
hydrogen, silicon and oxygen
How many different elements are there in Mg(OH)2
2
3
4
5
How many atoms are there in total in Magnesium hydroxide? Mg(OH)2
3
5
2
In a word equation, the starting chemicals are called...
reactants
products
ingredients
What is the scientific term for burning?
a fuel
flammable
combustion
heating
Sometimes, compounds can be broken down into simpler substances. What type of reaction is this?
combustion
oxidation
decomposition
displacement
magnesium + oxygen --> magnesium oxide
If you started with 5g of magnesium and 2.5g of oxygen, what mass of magnesium oxide would be produced?
5g
2.5g
7.5g
10g
How wide is a nano-scale particle?
1cm
1-100nm
1mm
Very small
How are nano-scale particles different to normal sized particles?
They're not.
They have different properties.
One metre is equal to
1 000 nm
1 000 000 nm
1 000 000 000 nm
1 000 000 000 000 nm
Which gas burns with a squeaky pop when a lit splint is inserted?
Hydrogen
Helium
Carbon dioxide
Oxygen
Name the compound that has the formula MgSO4
Magnesium sulfide
Magnesium sulfate
Which three of the following statements about chemical reactions are true?
Dissolving is a chemical reaction.
During a chemical reaction, atoms are rearranged.
Melting is a chemical reaction
Burning is a chemical reaction.
A chemical reaction makes new substance(s)
In an endothermic reactions the temperature of the reaction mixture ...
Increases
Decreases
Which of these gases is not a greenhouse gas?
methane
oxygen
carbon dioxide
water vapour
Which of these processes release carbon dioxide into the atmosphere? (There may be more than one).
Respiration
Photosynthesis
Combustion
What is the percentage of carbon dioxide in the earth’s atmosphere?
0.4%
4%
14%
0.04%
Read the information about methane, and then select the three statements that are true.
Engineers in Sweden make methane fuel for trains from cow manure. The formula of methane is CH4.
The methane produced from cow manure is non-renewable.
The methane produced from cow manure is a biofuel.
Methane makes sulfur dioxide when it burns.
Methane makes carbon dioxide when it burns.
Methane is a hydrocarbon.
Which expression best describes the diagram?
O4
4O
2O2
O2O2
What type of reaction does the following equation represent?
ZnCO3 -> ZnO + CO2
Combustion
Oxidation
Thermal decomposition
Displacment
Which of these observations are made in a precipitation reaction?
A solid forms from two solutions
A solid forms from a solid and a solution
Bubbles of gas form from two solutions
Bubbles of gas form from a solid and a solution
Define the term malleable
Can be bent without breaking
Can be broken easily
Can be hammered into shape
Can be drawn into a wire
Which statement best describes what this diagram represents?
a single compound
a mixture of elements
a mixture of compounds
a mixture containing an element and a compound
Name the gas formed when a metal reacts with an acid
Oxygen
Hydrogen
Carbon dioxide
Nitrogen
What is produced when magnesium and copper sulfate react?
Magnesium sulfate and copper
Magnesium sulfate and hydrogen
Magnesium sulfate and water
Magnesium carbonate and copper
A substance has a low melting point and forms acidic oxides. It is a ...
metal
non-metal
The diagram shows four different metals reacting with hydrochloric acid. Each small circle represents one bubble. Select the test tube which contains the most reactive metal.
A
B
C
D
Complete the gap in this equation:
Hydrochloric acid + Magnesium -> _________ _______ + Hydrogen
Magnesium chloride
Magnesium hydroxide
Salt
Carbon dioxide
Complete the gap in the following sentence:
If you add magnesium to copper sulfate solution, magnesium______________ copper from its compound.
neutralises
oxidises
displaces
precipitates
Select the pair of substances that react to form an oxide.
Iron and zinc sulfate
Zinc and oxygen
Magnesium and hydrochloric acid
Potassium and water
Tick all the statements that are properties of metals
They are poor conducts of heat
They are good conductors of electricity
They are all magnetic
A few are magnetic
They are brittle
What is the correct formula for sulfuric acid?
HSO3
H2SO3
H2SO3
H2SO4
Tick all the elements in this list that exist as diatomic molecules
Hydrogen
Helium
Oxygen
Nitrogen
Sulfur
What is the correct symbol for sodium?
(a)
Universal indicator is used to measure the (a) of solution
What must be present for iron to rust?
Water alone
Oxygen alone
Air alone
Oxygen and water
Painting stops iron rusting because the paint
is a catalyst for rusting
keeps out air and water
reacts with the air instead of the iron
dries up any moisture in the environment
Which of the following always happens during a chemical reaction?
Compounds react and split up into elements
Elements combine to form compounds
Atoms are broken down into smaller particles.
The atoms in the reactants are rearranged to make the products.
When magnesium is heated and reacts with oxygen gas…
It glows red and forms magnesium oxide gas.
It burns brightly and forms magnesium oxide gas.
It glows red and forms solid white magnesium oxide.
It burns brightly and forms solid white magnesium oxide.
Where are most non-metals found in the periodic table?
A
B
C
D
The main difference between a chemical change and a physical change is that in a chemical change you always get
a change of state.
heat given out.
a change in colour.
a new substance being formed.
Which description explains how carbon dioxide helps to cause the greenhouse effect?
It blocks energy from the Sun from reaching the Earth’s surface.
It absorbs energy emitted from the Earth’s surface and re-emits it out into space.
It absorbs energy emitted from the Earth’s surface so that it doesn’t get any warmer.
It absorbs energy emitted from the Earth’s surface and re-emits it back to the surface.
What does global warming mean?
The warming effect of the Sun on the Earth.
The natural warming effect caused by greenhouse gases in the atmosphere.
The additional warming effect caused by increasing amounts of carbon dioxide in the air.
The way the climate is changing as a result of more carbon dioxide in the air.
The products of combustion of a hydrocarbon are:
hydrogen + oxygen
carbon dioxide + water
carbon dioxide + hydrogen
carbon + water
