Cambridge O Level · 5070 · Paper 1 · Multiple choice
Chemistry 5070/12 May/June 2026 past paper
Cambridge O Level Chemistry (5070) Paper 1 (Multiple choice), variant 2, May/June 2026: the question paper and its official mark scheme, 40 questions worth 40 marks. Free to open, no account needed.
- Questions
- 40
- Marks
- 40
File names: 5070_s26_qp_12 · 5070_s26_ms_12
Topics in this paper
Which syllabus chapters 5070/12 May/June 2026 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 5070/12 May/June 2026
- Question 1
The melting and boiling points of four substances are shown. 1 boiling point /°C melting point …
- Question 2
Which statement is correct? 2 Air is a mixture because it is made up entirely of different compounds. A Chlorine is an element because all of its atoms have the same atomic number and mass number. B Lead(II) bromide is …
- Question 3
Which number is different for two isotopes of the same element? 3 the number of outer-shell electrons in each atom A the total number of electrons in each atom B the number of neutrons in each atom C the number …
- Question 4
Magnesium oxide has a high melting point. It is used to line the inside of furnaces that operate at high temperatures. Why does magnesium oxide have a high melting point? 4 It has metallic bonds. A It has strong forces …
- Question 5
Which substance has a giant covalent structure and contains atoms of more than one element? 5 diamond A graphite B methane C silicon(IV) oxide D
- Question 6
The displayed formula of a compound is shown. …
- Question 7
An ionic compound contains only three elements, X, Y and Z. The compound has a ratio of one atom of X to one atom of Y to three atoms of Z. The average mass of the isotopes of element X …
- Question 8
Nitrogen monoxide and oxygen react to form nitrogen dioxide. 2NO(g) + O2(g) →2NO2(g) What is the maximum volume of nitrogen dioxide that may be obtained when 1dm3 of nitrogen monoxide reacts with 2dm3 of oxygen when all volumes are measured …
- Question 9
During a titration, 25.0cm3 of 0.050mol/dm3 aqueous sodium hydroxide, NaOH, reacts exactly with 20.0cm3 of dilute phosphoric acid, H3PO4. 3NaOH + H3PO4 →Na3PO4 + 3H2O What is the concentration of the dilute phosphoric acid? 9 0.0208mol/dm3 A 0.0313mol/dm3 B 0.0625mol/dm3 …
- Question 10
Concentrated and dilute aqueous XCl are electrolysed separately using inert electrodes. X is a more reactive metal than sodium. Which row shows the products at the cathode and the anode? 10 dilute aqueous XCl concentrated aqueous XCl product at the …
- Question 11
Which statement comparing hydrogen–oxygen fuel cells with gasoline/petrol engines is correct? 11 A disadvantage of a hydrogen–oxygen fuel cell is that hydrogen is more difficult to store than gasoline/petrol. A A disadvantage of a hydrogen–oxygen fuel cell is that it …
- Question 12
Which row about endothermic reactions is correct? 12 ∆H overall energy change negative energy released when bonds are made is greater than energy used to break bonds A negative energy released when bonds are made is less than energy used …
- Question 13
Which property of a substance always remains the same during a physical change? 13 the density of the substance A the mass of the substance B the distance between the particles in the substance C the arrangement of particles in …
- Question 14
The reaction pathway diagram for both the catalysed and uncatalysed reactions between N2 and H2 in the Haber process is shown. What is the activation energy for the formation of NH3 in the presence of a catalyst? 14 energy progress …
- Question 15
Elements X and Y react together in a reversible reaction to form XY2. …
- Question 16
Iodine, I2, reacts with thiosulfate ions, S2O3 2–. I2(aq) + 2S2O3 2–(aq) →2I–(aq) + S4O6 2–(aq) Which row is correct? 16 I2(aq) is colour of I2(aq) a reducing agent brown A an oxidising agent brown B a reducing agent colourless …
- Question 17
Citric acid is a soluble carboxylic acid. A student does two tests on separate samples of an aqueous solution of citric acid. Which row is correct? 17 effect when thymolphthalein is added effect when limestone is added colourless solution carbon …
- Question 18
Two solutions are prepared. 18 • Solution P is 0.050mol/dm3 hydrochloric acid. • Solution Q is 0.100mol/dm3 butanoic acid. A 2cm strip of magnesium ribbon is put into 100cm3 of each solution. Fizzing is seen in both solutions, but the …
- Question 19
The formulae of three oxides are listed. 19 1 CuO 2 SO2 3 ZnO Which oxides react with NaOH(aq) to form a salt? 3 only D 2 only C 2 and 3 only …
- Question 20
Which statement about the arrangement of the elements in the Periodic Table is correct? 20 In all groups, the reactivity of the elements increases down the group. A The metallic character of the elements increases from left to right across …
- Question 21
Four statements about the elements in Group I of the Periodic Table are listed. 21 1 Potassium has a higher density than lithium. 2 Sodium has a higher melting point than lithium. 3 Lithium has more occupied electron shells than …
- Question 22
Rubidium is in Group I and fluorine is in Group VII of the Periodic Table. Which statements about these elements are correct? 22 1 Chlorine will displace fluorine from a solution of its salts. 2 Bromine is a liquid at …
- Question 23
Which statement about transition elements is correct? 23 Their soluble salts usually form coloured aqueous solutions. A They are all in the same group of the Periodic Table. B They are non-metals with high melting points. C They can be …
- Question 24
Which row describes an element in Group VIII of the Periodic Table? 24 structure reactivity diatomic reactive A monatomic reactive B diatomic unreactive C monatomic unreactive D
- Question 25
The properties of four substances are shown. The letters in the table are not the formulae of the substances. Which substances in the table may be metals? 25 electrical conductivity melting point/°C substance in aqueous solution when molten when solid …
- Question 26
Which statement about metals and alloys is correct? 26 Brass is a mixture of copper and tin. A Cutlery made of stainless steel contains iron and does not rust easily. B In pure metals, the negative ions are all the …
- Question 27
When element X is added to aqueous copper(II) sulfate, no effervescence is observed. The blue solution turns colourless. What is element X? 27 calcium A potassium B silver C zinc D
- Question 28
Which substance is used for the electrodes when aluminium is extracted from its ore? 28 bauxite A carbon B cryolite C platinum D
- Question 29
Water is added to anhydrous cobalt(II) chloride. Which colour change is seen? 29 blue to pink A blue to white B pink to blue C white to blue D
- Question 30
Z is a pollutant gas that is formed in car engines. An aqueous solution of Z is acidic. Z is removed from the exhaust gases in a catalytic converter by reduction. What is Z? 30 NO2 …
- Question 31
The structures of three compounds are shown. …
- Question 32
X and Y are hydrocarbons obtained from the fractional distillation of petroleum. Their molecular formulae are shown. …
- Question 33
An unbranched alkene, C4H8, undergoes an addition reaction with bromine. What is the possible structure of the product? 33 CH3CHBrCH2CH2Br A CH3CHBrCHBrCH3 B CH2BrCH2CH2CH2Br C CH3CH2CH2CH2Br …
- Question 34
Xmol of ethanol and Xmol of propan-1-ol separately undergo complete combustion at the same temperature and pressure. The complete combustion of Xmol of propan-1-ol requires 0.15mol of oxygen more than the complete combustion of Xmol of ethanol. What is the …
- Question 35
Ethanol can be converted by bacteria into vinegar, which contains ethanoic acid. Which type of chemical reaction is caused by the bacteria? 35 hydrogenation A neutralisation B oxidation C reduction D
- Question 36
An ester has the formula C2H5COOC2H5. Which pair of compounds would react together to form this ester? 36 ethanoic acid and ethanol A ethanol and propanoic acid B propanoic acid and propanol C propanol and ethanoic acid D
- Question 37
The formula of magnesium oxide can be investigated by using the fact that when magnesium is heated, it reacts with oxygen to form magnesium oxide. Which apparatus is used for this investigation? 37 gas syringe balance crucible …
- Question 38
The diagram represents a chromatogram of the colourless acids in a drink. The chromatogram has been treated with a locating agent. A table of Rf values for the possible acids is given. …
- Question 39
Which two pieces of apparatus are essential when separating a mixture of sodium chloride and barium sulfate? 39 1 filter funnel 2 filter paper 3 measuring cylinder 4 thermometer 3 and …
- Question 40
An unknown salt, X, contains only one cation and only one anion. Aqueous sodium hydroxide is added to an aqueous solution of X. A white precipitate is formed that is soluble in excess aqueous sodium hydroxide. Aluminium foil is then …
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