Cambridge O Level · 5070 · Paper 1 · Multiple choice
Chemistry 5070/12 May/June 2024 past paper
Cambridge O Level Chemistry (5070) Paper 1 (Multiple choice), variant 2, May/June 2024: the question paper and its official mark scheme, 40 questions worth 40 marks, with the grade thresholds. Free to open, no account needed.
- Questions
- 40
- Marks
- 40
- Grade A from
- 25
File names: 5070_s24_qp_12 · 5070_s24_ms_12
Grade thresholds for 5070/12 May/June 2024
The minimum raw marks Cambridge set for each grade on this component (out of 40). Thresholds change every session and variant, so always compare your score with the paper you actually sat.
| A | B | C | D | E |
|---|---|---|---|---|
| 25 | 20 | 14 | 13 | 11 |
Topics in this paper
Which syllabus chapters 5070/12 May/June 2024 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 5070/12 May/June 2024
- Question 1
Which physical changes are both exothermic? A condensation and evaporation B evaporation and melting C freezing and condensation D melting and freezing
- Question 2
What is tap water? A a compound B a mixture of compounds and elements C a mixture of elements D an element
- Question 3
In which pair of particles is: ● the sum of their charges equal to zero ● the sum of their masses almost the same as 12 1 of the mass of an atom of 12C? A one electron and one …
- Question 4
An element has two isotopes of relative isotopic masses x and x+2. The diagram shows the composition of atoms in a sample of the element. …
- Question 5
Which molecule has only four electrons involved in covalent bonds? A Cl 2 B CO2 …
- Question 6
The melting points and boiling points of four compounds, …
- Question 7
What is the formula of zinc oxide? A Zn2O B ZnO C Zn2O3 D ZnO2
- Question 8
Which statement is correct? A If the relative formula mass of hydrated sodium carbonate, Na2CO3•xH2O, is 286, then x is 10. B Phosphoric(V) acid, H3PO4, has a relative molecular mass of 50. C The relative atomic mass of a sample …
- Question 9
In a volumetric experiment, 25.0 cm3 of 0.100 mol / dm3 sodium hydroxide reacts exactly with 20.0 cm3 of dilute sulfuric acid. 2NaOH + H2SO4 Na2SO4 + 2H2O What is the concentration of the dilute sulfuric acid? A 0.0625 …
- Question 10
The equation for the reaction between ammonium chloride and calcium hydroxide is shown. 2NH4Cl + Ca(OH)2 2NH3 + CaCl …
- Question 11
The diagram shows a simple electrolytic cell. + – electrodes electrolyte …
- Question 12
Which changes are observed during the electrolysis of aqueous copper(II) sulfate using copper electrodes? 1 A pink solid is deposited on the negative electrode. 2 Bubbles form on the positive electrode. 3 The colour of the solution does not change. …
- Question 13
Which row describes a hydrogen-oxygen fuel cell? chemical product comparison of fuel cell with petrol engine A hydrogen and oxygen hydrogen has a lower energy content by mass than petrol B hydrogen and oxygen a renewable fuel may be used …
- Question 14
Which statements about endothermic reactions are correct? 1 Energy is absorbed from the surroundings. 2 Energy is released to the surroundings. 3 The temperature of the reaction mixture falls. 4 The temperature of the reaction mixture rises. A 1 and …
- Question 15
Hydrogen and chlorine react to form hydrogen chloride. H2 + Cl 2 2HCl Bond energy data is given in the table. bond bond energy in kJ / mol H–H 436 Cl –Cl 242 H–Cl 431 What is the enthalpy …
- Question 16
Which statement is correct? A Both physical changes and chemical changes produce new substances. B Chemical changes are irreversible. C During a chemical change, atoms rearrange themselves to form new chemical bonds. D The only way to reverse a physical …
- Question 17
Two reactions each produce a gaseous product. The reactions are performed separately using the same conditions of temperature and pressure. The volume of gas formed in each experiment is measured over time and the results are plotted in the graph …
- Question 18
The reaction between calcium oxide and carbon dioxide is reversible and the forward reaction is exothermic. CaO(s) + CO2(g) CaCO3(s) A mixture of calcium oxide and carbon dioxide is placed in a heated flask and the reaction reaches equilibrium. Which …
- Question 19
In the Haber process, hydrogen and nitrogen react to form ammonia in the presence of a catalyst. Which reactant is obtained by fractional distillation and what is the catalyst used in the Haber process? obtained by fractional distillation catalyst A …
- Question 20
Chlorine reacts with aqueous sodium bromide to form aqueous sodium chloride and bromine. Which statement about this reaction is correct? A Bromide ions are oxidised because they lose electrons. B Chlorine atoms are oxidised because they gain electrons. C Sodium …
- Question 21
One mole of compound X gives two moles of ions in aqueous solution. X reacts with ammonium carbonate to give an acidic gas. What is compound X? A calcium hydroxide B ethanoic acid C nitric acid D sodium hydroxide
- Question 22
Which statement about weak acids is correct? A Some molecules are not dissociated. B Weak acids do not react with carbonates. C Weak acids always form more dilute solutions than strong acids. D Weak acids always have lower pH values …
- Question 23
Which compound is the least soluble in water? A calcium chloride B lead nitrate C magnesium carbonate D potassium sulfate
- Question 24
Which statement about water of crystallisation is correct? A The ratio of CoCl …
- Question 25
The diagram shows a section of the Periodic Table. Which element is a metal that has exactly three outer shell electrons? …
- Question 26
The table compares two properties of lithium and potassium. Which row is correct? greater density greater tendency to form a positive ion A lithium lithium B lithium potassium C potassium lithium D potassium potassium
- Question 27
Which properties are correct for the element copper? melting point / C malleability A 83 low B 83 high C 1083 low D 1083 high
- Question 28
Which statement is correct? A Copper is unreactive because of an oxide layer. B Gold and silver are used to make jewellery because they corrode very slowly. C Magnesium can be displaced from aqueous solutions of its ions by adding …
- Question 29
Which reaction takes place in the blast furnace? A FeCr2O4 …
- Question 30
The presence of water can be confirmed by the use of either anhydrous cobalt(II) chloride or anhydrous copper(II) sulfate. Which observation is correct if water is present? A Anhydrous cobalt(II) chloride turns from blue to white. B Anhydrous cobalt(II) chloride …
- Question 31
Ammonium phosphate, (NH4)3PO4, may be used as a fertiliser. What is the percentage by mass of elements that improve plant growth in ammonium phosphate? …
- Question 32
Which statement is correct? A An unsaturated hydrocarbon is one in which more solute can dissolve. B Members of a homologous series each differ from the next by a –CH2– unit. C Structural isomers have the same displayed formula but …
- Question 33
What is the name of the ester C3H7COOC2H5? A butyl ethanoate B ethyl butanoate C ethyl propanoate D propyl ethanoate
- Question 34
Petroleum is separated into useful products by fractional distillation. Which of these fractions has the lowest boiling point? A bitumen B fuel oil C gasoline / petrol D kerosene / paraffin
- Question 35
Which equation represents a substitution reaction? …
- Question 36
Which row shows the minimum number of moles of oxygen needed for the complete combustion of 1 mole of the named alcohol? alcohol moles of oxygen A butan-1-ol 6 B butan-2-ol 12 C propan-1-ol 3 D propan-2-ol 6
- Question 37
The diagram shows the partial structure of a polymer. …
- Question 38
A student measures the rate at which a fixed mass of magnesium reacts with a fixed volume of dilute hydrochloric acid. dilute hydrochloric acid gas syringe magnesium Which additional pieces of apparatus are required for this experiment? A a balance, …
- Question 39
Two titrations of dilute hydrochloric acid with aqueous sodium hydroxide are done using two different indicators, methyl orange and thymolphthalein. The equation for the reaction is shown. HCl (aq) + NaOH(aq) NaCl (aq) + H2O(l) Using a volumetric pipette, …
- Question 40
What is used to separate a solid mixture of copper powder and sodium chloride to obtain pure, solid samples of each compound? 1 a suitable solvent 2 distillation 3 crystallisation 4 filtration …
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