Common substances at GCSE

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

Front (Question)

What is the formula and state symbol for water

Back (Answer)

H2O (l)

Front (Question)

What is the formula and state symbol for hydrogen gas?

Back (Answer)

H2 (g)

Front (Question)

What is the test for Hydrogen gas (test 1 mark / positive result 1 mark)

Back (Answer)

Add a lighted splint and it makes a squeaky pop

Front (Question)

What is the formula and state symbol for oxygen gas?

Back (Answer)

O2 (g)

Front (Question)

What is the test for oxygen gas? (test 1 mark / positive result 1 mark)

Back (Answer)

Add a glowing splint and the splint relights

Front (Question)

What is the formula and state symbol for carbon dioxide at room temperature?

Back (Answer)

CO2 (g)

Front (Question)

What is the test for carbon dioxide gas (1 mark for test / 1 mark for positive result)

Back (Answer)

Bubble the gas through lime water which will go cloudy if the gas is carbon dioxide

Front (Question)

What is the formula and state symbol for Chlorine at room temperature?

Back (Answer)

Cl2 (g)

Front (Question)

What is the name, formula and state symbol for the gas that comes out of the gas taps ?

Back (Answer)

Methane CH4 (g)

#10

Front (Question)

Calcium carbonate has the formula CaCO3. Which atoms and how many of them are in calcium carbonate?

Back (Answer)

Calcium (Ca) x 1 Carbon (C) x 1 Oxygen (O) x 3

#11

Front (Question)

Sodium chloride is table salt. Give the fromula and state symbol for table salt

Back (Answer)

NaCl (s)

#12

Front (Question)

Table salt dissolves in water to give salt solution. Give the formula and state symbol for salt solution

Back (Answer)

NaCl (aq)

#13

Front (Question)

Copper sulpate forms blue crystals. Give the formula and state symbol for copper sulphate crystals

Back (Answer)

CuSO4 (s)

#14

Front (Question)

What elements and how many of them are in Copper sulphate CuSO4

Back (Answer)

Copper (Cu) x 1 Sulphur (S) x 2 Oxygen (O) x 4

#15

Front (Question)

What ions and how many of them are in copper sulphate CuSO4

Back (Answer)

Copper ions Cu2+ x 1 Sulphate ions SO42- x 1

#16

Front (Question)

Hydrochloric acid is a common name. We should call hydrochlroic acid hydrogen chloride. Give the formula and state symbol for hydrochloric acid

Back (Answer)

HCl (aq)

#17

Front (Question)

Ammonia is a common gas at GCSE which contains nitrogen and hydrogen. What is the formula state symbol of ammonia

Back (Answer)

NH3 (g)

#18

Front (Question)

What is the formula and state symbol for carbon monoxide

Back (Answer)

CO (g)

#19

Front (Question)

What is the balanced equation with state symbols for burning carbon to give carbon dioxide

Back (Answer)

C (s) + O2 (g) –> CO2 (g)

#20

Front (Question)

What is the balanced equation with state symbols for sodium metal reacting with chlorine gas to make sodium chloride?

Back (Answer)

2Na (s) + Cl2 (g) –> 2NaCl (s)

#21

Front (Question)

What colour is copper sulphate solution

Back (Answer)

Blue

#22

Front (Question)

Describe what sodium chloride solution looks like

Back (Answer)

A colour less solution

#23

Front (Question)

Describe what Hydrogen gas is like

Back (Answer)

A colourless gas which is lighter than air

#24

Front (Question)

Describe what magnesium metal looks like

Back (Answer)

A silver metal