Cambridge O Level · 5070 · Paper 1 · Multiple choice
Chemistry 5070/12 May/June 2022 past paper
Cambridge O Level Chemistry (5070) Paper 1 (Multiple choice), variant 2, May/June 2022: 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
- 21
File names: 5070_s22_qp_12 · 5070_s22_ms_12
Grade thresholds for 5070/12 May/June 2022
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 |
|---|---|---|---|---|
| 21 | 17 | 14 | 12 | 11 |
Topics in this paper
Which syllabus chapters 5070/12 May/June 2022 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 5070/12 May/June 2022
- Question 1
A student investigates the rate of reaction between calcium carbonate and hydrochloric acid. hydrochloric acid calcium carbonate The volume of gas in the syringe is recorded after one minute. The experiment is repeated using different concentrations of hydrochloric acid. Which …
- Question 2
Which statement is correct? A A mixture of liquids with boiling points which differ by 35 C can be separated by distillation. B Locating agents are needed to identify the colours present in ink. C The desalination of sea water …
- Question 3
Some reactions of an aqueous solution of compound X are given. When a few drops of aqueous sodium hydroxide are added, a white precipitate is formed. When dilute nitric acid is added and the mixture is warmed, a …
- Question 4
Which set of changes to the conditions increases the volume of a gas? pressure temperature A decreases increases B increases decreases C increases unchanged D unchanged decreases
- Question 5
Ethylamine gas, C2H5NH2, and hydrogen chloride gas, HCl, react together to form a white solid, ethylamine hydrochloride. At which position in the tube would a ring of solid white ethylamine hydrochloride form? …
- Question 6
Element X can be represented by the symbol 14 6X. Which statements about an atom of element X are correct? 1 It has 6 electrons. 2 It has 8 protons. 3 It is an isotope of carbon. 4 It is …
- Question 7
Two isotopes of chlorine are 35Cl and 37Cl. Using these isotopes and 12C and 1H, how many different relative molecular masses are possible for the compound with molecular formula C2H3Cl …
- Question 8
Which row is correct? elements compounds mixtures A graphite, iron methane, water air, copper B graphite, iron sand, water air, brass C iron, water methane, graphite air, brass D water, methane air, graphite iron, brass
- Question 9
Which statement about ionic compounds is correct? A They are all solids at room temperature. B They all conduct electricity at room temperature. C They are all soluble in water. D They all have strong intermolecular forces.
- Question 10
A molecule of tetrafluorosilane, SiF4, is shown in the dot-and-cross diagram. Only the outer shell electrons are shown. Si …
- Question 11
The table describes two properties associated with metals. Which row shows a correct reason for the stated property? property reason A malleable the layers of metal anions can slide over each other B malleable the layers of metal cations can …
- Question 12
Aqueous silver nitrate, AgNO3, reacts with aqueous potassium chromate(VI), K2CrO4, to give a yellow precipitate. What is the ionic equation for this reaction? A 2AgNO3(aq) + K2CrO4(aq) Ag2CrO4(s) + 2KNO3(aq) B 2Ag+(aq) + 2NO3 –(aq) + 2K+(aq) + CrO4 …
- Question 13
What is the relative formula mass of anhydrous sodium carbonate? …
- Question 14
What contains the greatest mass of solute? A 100 cm3 of 1.00 mol / dm3 sodium hydroxide, NaOH B 500 cm3 of 0.05 mol / dm3 sulfuric acid, H2SO4 C 1.00 dm3 of 0.10 mol / dm3 potassium hydroxide, KOH …
- Question 15
How many tonnes of aluminium oxide, Al 2O3, are required to produce 27 tonnes of aluminium? …
- Question 16
Dilute sulfuric acid is electrolysed. Hydrogen gas and oxygen gas are produced. Which row correctly describes what happens? oxygen produced at the hydrogen produced at the concentration of acid A anode cathode decreases B anode cathode increases C cathode anode …
- Question 17
Aluminium can be extracted by the electrolysis of aluminium oxide dissolved in molten cryolite. Which reactions take place during the electrolysis? reaction at the anode reaction at the cathode A Al …
- Question 18
Which reaction is exothermic? A combustion of methane B cracking of hydrocarbons C decomposition of water into hydrogen and oxygen by electrolysis D photosynthesis in plants
- Question 19
What is the correct balanced equation and enthalpy change, H, for the complete combustion of butanol, C4H9OH? A C4H9OH(l) …
- Question 20
Bromate, bromide and hydrogen ions react according to the equation shown. BrO3 –(aq) + 5Br –(aq) + 6H+(aq) 3Br2(aq) + 3H2O(l) Some apparatus for measuring how the rate of this reaction varies over time is suggested. 1 gas syringe …
- Question 21
25 cm3 of 1.0 mol / dm3 hydrochloric acid reacts with 10 g of a solid to produce a gas. The solid is in excess. The graph labelled first experiment shows the volume of gas produced over time. Graphs P …
- Question 22
Nitrogen dioxide, NO2, is a dark brown gas that decomposes as shown in the equation. 2NO2(g) 2NO(g) + O2(g) dark brown colourless The diagram shows a glass flask containing a mixture of the three gases. The mixture is pale brown. …
- Question 23
What is an observation of an oxidation process? A blue copper sulfate crystals turning to white powder when heated B copper being deposited on the cathode during electrolysis C green gas being produced at the anode when sodium chloride is …
- Question 24
An excess of aqueous iodide ions is added to acidified aqueous potassium manganate(VII). Which row is correct? iodide ions colour of final solution A oxidised colourless B oxidised brown C reduced colourless D reduced brown
- Question 25
When ammonia gas is dissolved in water a reversible reaction takes place. NH3(g) + H2O(l) NH4 +(aq) + OH–(aq) Which statements are correct? 1 Ammonia is an alkali because it produces hydroxide ions in solution. 2 The pH of this …
- Question 26
Three dilute solutions of acid, each with a concentration of 0.01 mol / dm3, are reacted separately with excess calcium carbonate until there is no further reaction. The same volume of acid is used each time. The carbon dioxide produced …
- Question 27
The steps for the preparation of a pure sample of sodium nitrate are listed. 1 Titrate with dilute nitric acid until the end-point is seen. 2 Evaporate to concentrate the solution. 3 Rinse out the conical flask. 4 Add indicator. …
- Question 28
A white compound is insoluble in water. Which cations and anions could be present in the compound? sodium calcium carbonate nitrate …
- Question 29
The flow chart describes the preparation of ammonium sulfate. air element 3 element 4 element 1 Haber process element 2 Contact process ammonium sulfate air What are elements …
- Question 30
Which row correctly shows the possible uses of sulfur dioxide and sulfuric acid? sulfur dioxide sulfuric acid A as a bleach as battery acid B killing bacteria in food as a bleach C making detergents as battery acid D making …
- Question 31
Selenium is in Group VI and gallium is in Group III. Which prediction can be made from this information? A A gallium atom has three more protons than a selenium atom. B Gallium is more likely to form negative ions …
- Question 32
Which statement about some metals and their compounds is correct? A Calcium reacts with cold water but not with steam. B Lead carbonate decomposes at a higher temperature than zinc carbonate. C Magnesium can be extracted from its oxide by …
- Question 33
The diagram shows an experiment to determine the percentage of oxygen in air. lit candle bell jar water Which diagram shows the correct level of water after the candle stops burning? …
- Question 34
The addition reaction between a hydrocarbon X and bromine forms only one product. Which compound is X? A CH4 …
- Question 35
A series of reactions producing propanol from the naphtha fraction of petroleum (crude oil) is shown. naphtha …
- Question 36
The structures of four alcohols are shown. …
- Question 37
Which compounds have the molecular formula C3H6O2? 1 methyl ethanoate 2 ethyl methanoate 3 propanoic acid A 1 and 2 only B 1 and 3 only C 2 and 3 only …
- Question 38
An organic compound has the empirical formula CH2O. Which row shows a possible correct name and structure for this compound? name structure A methanol B methanoic acid C ethanol D ethanoic acid
- Question 39
Which statement is correct? A Complex carbohydrates, such as starch, are hydrolysed to give simple sugars. B Fats have the same amide linkages as Terylene. C Proteins and nylon are polymers formed from the same monomers but with different linkages. …
- Question 40
The repeat unit of a polymer is shown. CH3 Cl Br …
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