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Practice paper written from an analysis of every
O-Level Science (Chemistry) paper, 2010–2026
Paper 1 Multiple Choice (Chemistry section)
FORECAST PAPER · SET 2 Easy
For practice before the 2026 examination
30 minutes
Additional Materials: Paper for your answers, numbered 1 to 20
Write in soft pencil.
Do not use staples, paper clips, glue or correction fluid.
There are twenty questions on this paper. Answer all questions. For each question there are four possible answers A, B, C and D.
Choose the one you consider correct and record your choice on a separate sheet of paper, numbered 1 to 20.
Each correct answer will score one mark. A mark will not be deducted for a wrong answer.
Any rough working should be done in this booklet.
A copy of the Data Sheet is printed on page 9.
A copy of the Periodic Table is printed on page 10.
The use of an approved scientific calculator is expected, where appropriate.
A factory makes instant cold packs that contain ammonium nitrate.
A technician finds how much the temperature falls when 10.0 g of ammonium nitrate dissolves in 50 cm3 of water.
Four pieces of apparatus are listed.
Which pieces of apparatus are needed?
A desalination plant makes drinking water from sea water by distillation.
Which statement describes this method?
A textile factory compares the dyes in a piece of cloth with four known dyes, J, K, L and M.
The paper chromatogram is shown.
Which statement is correct?
Chlorine is made in a factory and used to treat drinking water.
Each diagram shows all of the outer shell electrons.
In each diagram, • is an electron from one chlorine atom and × is an electron from the other chlorine atom.
Which diagram shows the bonding in a molecule of chlorine?
Which row shows the correct symbol or formula for each substance?
| lead | potassium | calcium hydroxide | |
|---|---|---|---|
| A | Pb | K | Ca(OH)2 |
| B | Pb | K | CaOH2 |
| C | Pb | P | Ca(OH)2 |
| D | Pl | K | Ca(OH)2 |
Which two ions react together when dilute sulfuric acid is neutralised by aqueous sodium hydroxide?
Oxide X and oxide Y are made in a factory.
Oxide X reacts with dilute hydrochloric acid but not with aqueous sodium hydroxide.
Oxide Y reacts with aqueous sodium hydroxide but not with dilute hydrochloric acid.
Which row shows the type of element that forms each oxide?
| element in oxide X | element in oxide Y | |
|---|---|---|
| A | metal | metal |
| B | metal | non-metal |
| C | non-metal | metal |
| D | non-metal | non-metal |
Zinc reacts with dilute sulfuric acid to make hydrogen gas.
Which statement about the zinc is correct?
Which statement about the Periodic Table is correct?
An atom of element Z has the electronic configuration 2.8.6.
The letter is not the chemical symbol.
Which row describes element Z?
| number of outer shell electrons | type of element | |
|---|---|---|
| A | 3 | metal |
| B | 3 | non-metal |
| C | 6 | metal |
| D | 6 | non-metal |
A technician adds a strip of each of four metals, W, X, Y and Z, to dilute hydrochloric acid.
The strips are the same size and the acid has the same concentration and temperature each time.
The letters are not the chemical symbols.
The table shows the volume of hydrogen collected in the first minute.
| metal | volume of hydrogen / cm3 |
|---|---|
| W | 28 |
| X | 0 |
| Y | 74 |
| Z | 9 |
What is the order of increasing reactivity of the metals?
A factory makes bioethanol from maize.
Burning the bioethanol as a fuel releases carbon dioxide.
This carbon dioxide is offset by carbon dioxide taken in from the air as the maize plants grow.
Which process takes in the carbon dioxide?
The table shows information about three alkenes.
| alkene | formula | boiling point / °C |
|---|---|---|
| propene | C3H6 | −48 |
| butene | C4H8 | −6 |
| pentene | C5H10 | 30 |
Hexene is the next member of this homologous series.
Which row describes hexene?
| formula | boiling point | chemical properties | |
|---|---|---|---|
| A | C6H12 | higher than 30 °C | different from those of propene |
| B | C6H12 | higher than 30 °C | similar to those of propene |
| C | C6H12 | lower than 30 °C | similar to those of propene |
| D | C6H14 | higher than 30 °C | similar to those of propene |
Hydrocarbons X and Y are made in a petrochemical plant.
Their structures are shown.
Aqueous bromine, which is orange, is shaken with each hydrocarbon separately.
One hydrocarbon turns the aqueous bromine colourless.
Which row identifies this hydrocarbon and gives the reason?
| hydrocarbon | reason | |
|---|---|---|
| A | X | it has a C=C double bond |
| B | X | it has only single bonds |
| C | Y | it has a C=C double bond |
| D | Y | it has only single bonds |
Which compound is in the same homologous series as propanol, C3H7OH?
A chemical works oxidises propanol, CH3CH2CH2OH, using acidified potassium manganate(VII).
A carboxylic acid is formed.
What is the formula of the carboxylic acid?
Poly(chloroethene) is used to make water pipes.
Part of a molecule of poly(chloroethene) is shown.
It is made by joining together many molecules of chloroethene, CH2=CHCl.
How many molecules of chloroethene joined together to make the part shown?
Four statements about the recycling of plastics are listed.
Which two statements describe environmental benefits of recycling plastics?
An air-quality monitor in an industrial area detects five gases.
How many of these gases are common atmospheric pollutants?
People who live near a coal-fired power station have breathing problems.
Acid rain from the power station wears away the stone of nearby buildings.
Which gas from the power station causes both problems?
| aluminium hydroxide | white |
| calcium hydroxide | white |
| copper(II) hydroxide | light blue |
| iron(II) hydroxide | green |
| iron(III) hydroxide | red-brown |
| zinc hydroxide | white |
Group | |||||||||||||||||
1 | 2 |
| 13 | 14 | 15 | 16 | 17 | 18 | |||||||||
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| 1 H hydrogen 1 |
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| 2 He helium 4 | ||
3 Li lithium 7 | 4 Be beryllium 9 |
| proton (atomic) number atomic symbol name relative atomic mass |
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| 5 B boron 11 | 6 C carbon 12 | 7 N nitrogen 14 | 8 O oxygen 16 | 9 F fluorine 19 | 10 Ne neon 20 | ||
11 Na sodium 23 | 12 Mg magnesium 24 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 Al aluminium 27 | 14 Si silicon 28 | 15 P phosphorus 31 | 16 S sulfur 32 | 17 Cl chlorine 35.5 | 18 Ar argon 40 |
19 K potassium 39 | 20 Ca calcium 40 | 21 Sc scandium 45 | 22 Ti titanium 48 | 23 V vanadium 51 | 24 Cr chromium 52 | 25 Mn manganese 55 | 26 Fe iron 56 | 27 Co cobalt 59 | 28 Ni nickel 59 | 29 Cu copper 64 | 30 Zn zinc 65 | 31 Ga gallium 70 | 32 Ge germanium 73 | 33 As arsenic 75 | 34 Se selenium 79 | 35 Br bromine 80 | 36 Kr krypton 84 |
37 Rb rubidium 85 | 38 Sr strontium 88 | 39 Y yttrium 89 | 40 Zr zirconium 91 | 41 Nb niobium 93 | 42 Mo molybdenum 96 | 43 Tc technetium – | 44 Ru ruthenium 101 | 45 Rh rhodium 103 | 46 Pd palladium 106 | 47 Ag silver 108 | 48 Cd cadmium 112 | 49 In indium 115 | 50 Sn tin 119 | 51 Sb antimony 122 | 52 Te tellurium 128 | 53 I iodine 127 | 54 Xe xenon 131 |
55 Cs caesium 133 | 56 Ba barium 137 | 57–71 lanthanoids
| 72 Hf hafnium 178 | 73 Ta tantalum 181 | 74 W tungsten 184 | 75 Re rhenium 186 | 76 Os osmium 190 | 77 Ir iridium 192 | 78 Pt platinum 195 | 79 Au gold 197 | 80 Hg mercury 201 | 81 Tl thallium 204 | 82 Pb lead 207 | 83 Bi bismuth 209 | 84 Po polonium – | 85 At astatine – | 86 Rn radon – |
87 Fr francium – | 88 Ra radium – | 89–103 actinoids
| 104 Rf rutherfordium – | 105 Db dubnium – | 106 Sg seaborgium – | 107 Bh bohrium – | 108 Hs hassium – | 109 Mt meitnerium – | 110 Ds darmstadtium – | 111 Rg roentgenium – | 112 Cn copernicium – | 113 Nh nihonium – | 114 Fl flerovium – | 115 Mc moscovium – | 116 Lv livermorium – | 117 Ts tennessine – | 118 Og oganesson – |
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lanthanoids | 57 La lanthanum 139 | 58 Ce cerium 140 | 59 Pr praseodymium 141 | 60 Nd neodymium 144 | 61 Pm promethium – | 62 Sm samarium 150 | 63 Eu europium 152 | 64 Gd gadolinium 157 | 65 Tb terbium 159 | 66 Dy dysprosium 163 | 67 Ho holmium 165 | 68 Er erbium 167 | 69 Tm thulium 169 | 70 Yb ytterbium 173 | 71 Lu lutetium 175 |
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actinoids | 89 Ac actinium – | 90 Th thorium 232 | 91 Pa protactinium 231 | 92 U uranium 238 | 93 Np neptunium – | 94 Pu plutonium – | 95 Am americium – | 96 Cm curium – | 97 Bk berkelium – | 98 Cf californium – | 99 Es einsteinium – | 100 Fm fermium – | 101 Md mendelevium – | 102 No nobelium – | 103 Lr lawrencium – |
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The volume of one mole of any gas is 24 dm3 at room temperature and pressure (r.t.p.).
The Avogadro constant, L = 6.02 × 1023 mol-1