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WorksheetsYear 7 Chemistry mid point test
Total questions: 50
Worksheet time: 50mins
Which of these things is an element?
salt
water
oxygen
air
The smallest part of an element is called:
an atom.
a compound.
a molecule.
an ion.
Which list contains three typical properties of metals?
good conductor of heat, brittle, low melting point
poor conductor of heat, strong, high melting point
good conductor of electricity, strong, high melting point
poor conductor of electricity, weak, low melting point
A compound contains:
only one type of atom.
at least two different elements chemically joined together.
only one element.
only two elements joined together.
The formula of ammonia is NH3. Which TWO statement are true?
An atom of ammonia contains 4 molecules.
An atom of ammonia contains two different elements.
A molecule of ammonia contains 4 atoms.
A molecule of ammonia contains 4 different elements.
Which of these word equations is correct?
copper + oxygen -> copper sulphate
iron + chlorine -> iron oxide
aluminium + iodine -> aluminium iodide
sodium + sulphur ® sodium hydroxide
How many elements are there in the compound iron sulphide? (FeS)
1
2
3
0
The substances that you get at the end of a chemical reaction are called:
reactants.
chemicals.
gases.
products.
Which list contains the three gases which make up the air?
hydrogen, oxygen, carbon dioxide
argon, nitrogen, hydrogen
nitrogen, oxygen, carbon dioxide
argon, oxygen, carbon dioxide
Which substance:
is a gas at room temperature?
sulphur
oxygen
magnesium
water
which substance:
Is a liquid metal?
magnesium
sulphur
mercury
water
Which substance:
Is a solid non-metal?
sulphur
oxygen
mercury
water
Which substance:
is a chemical compound?
iron
water
oxygen
mercury
correct symbol for iron
Ir
I
Fe
W
Correct symbol for Lithium
L
Li
P
K
Correct symbol for Calcium
C
Ca
Pt
Na
correct symbol for sodium
S
Na
Cu
Ca
correct symbol for Carbon
Cu
C
Ca
Cb
correct symbol for Helium
H
He
Hl
Hm
correct symbol for Hydrogen
H
He
Hl
Hg
Bruce dropped one of the pieces of charcoal and it broke when it hit the ground. What word describes things which shatter in this way?
Weak
Strong
Brittle
Bendy
All of these statements about charcoal are true.
Tick one box which shows a property that is more typical of metals than non-metals.
Charcoal is a dull black solid.
Charcoal burns when you heat it.
Charcoal has a high melting point.
Charcoal has a low density.
Kelly had three coins. Her new 2p coin was very shiny. Her 2p coin from 1990 was dull, and a darker brown colour. The penny from 1890, which was almost black. All the coins contained copper.
Why have the older coins changed colour? (2 answers)
They are dirty
They have reacted with Oxygen
They have worn away
They have reacted with Carbon Dioxide
What is the chemical name for the black coating on the 1890 coin?
(a)
Sometimes copper objects get a pale green coating. This is copper carbonate, which has the chemical formula CuCO3. How many different elements are there in copper carbonate?
(a)
Sometimes copper objects get a pale green coating. This is copper carbonate, which has the chemical formula CuCO3. How many atoms are there in copper carbonate?
(a)
write down whether this is an element, mixture or compound.
OXYGEN
(a)
write down whether this is an element, mixture or compound.
Carbon dioxide
(a)
write down whether this is an element, mixture or compound.
copper
(a)
write down whether this is an element, mixture or compound.
Air
(a)
write down whether this is an element, mixture or compound.
Water
(a)
write down whether this is an element, mixture or compound.
Soil
(a)
Which one shows: molecules of an element
a
b
c
d
Which one shows: molecules of a compound
A
B
C
D
Which one shows: a mixture of different elements
A
B
C
D
Which one shows: a mixture of elements and compounds
A
B
C
D
The graph shows what happens to the temperature of a solid when it was heated until it melted.
What happened to the temperature in the first 4 minutes?
(a)
The graph shows what happens to the temperature of a solid when it was heated until it melted. What happened to the temperature between 4 and 10 minutes?
stayed the same
decreased
increased
Sodium reacts with water to form:
sodium chloride
sodium hydroxide
sodium carbonate
sodium oxide
When an acid and an alkali react together:
a salt and water are both produced.
a metal is formed.
only a salt is produced.
a gas is given off.
When an acid reacts with a metal carbonate, the products are:
the metal and carbon dioxide
carbon dioxide, water and a salt.
a salt and water.
the metal, a salt and water.
A metal which is used in jewellery because it is shiny
and un-reactive.
copper
tin
iron
silver
sodium
A metal which rusts if it is left out in damp air.
copper
tin
iron
silver
sodium
A metal that can be used as a coating on cans because it is less reactive than iron.
copper
tin
iron
silver
sodium
A metal which is soft and can be cut with a knife, and which reacts easily with air and water.
copper
tin
iron
silver
sodium
A metal which is used for coins and pipes because it hardly reacts with air or water.
copper
tin
iron
silver
sodium
zinc + sulphuric acid ->
zinc sulphate + Hydrogen
Zinc sulphide + Hydrogen
zinc sulphate +Oxygen
zinc sulphide + Oxygen
magnesium + hydrochloric acid
Magnesium sulphide + hydrogen
magnesium chloride + hydrogen
Magnesium chlorate + hydrogen
Magnesium chlorate + Oxygen
zinc + nitric acid
Zinc chloride + hydrogen
Zinc sulphate + hydrogen
Zinc nitrate + hydrogen
zinc nitride + hydrogen
Many fuels contain hydrogen and carbon.
When a fuel burns it reacts with an element from the air. What is this element?
(a)
