Cambridge O Level · 5070 · Paper 1 · Multiple choice
Chemistry 5070/12 May/June 2023 past paper
Cambridge O Level Chemistry (5070) Paper 1 (Multiple choice), variant 2, May/June 2023: 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
- 26
File names: 5070_s23_qp_12 · 5070_s23_ms_12
Grade thresholds for 5070/12 May/June 2023
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 |
|---|---|---|---|---|
| 26 | 20 | 14 | 12 | 11 |
Topics in this paper
Which syllabus chapters 5070/12 May/June 2023 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 5070/12 May/June 2023
- Question 1
A sample of iodine is at room temperature and pressure. Which statement about the particles in the sample is correct? A The particles are arranged in a giant lattice. B The particles have zero kinetic energy. C The particles move …
- Question 2
Element Z, nucleon number 31, forms an ion Z3–. Where is Z found in the Periodic Table? A Group III B Group V C Period 4 D Period 5
- Question 3
Naturally occurring bromine has a relative atomic mass of 80 and consists entirely of two isotopes of relative atomic masses 79 and 81. What can be deduced about naturally occurring bromine from this information only? A Bromine contains the two …
- Question 4
Element X and element Y react together to form a compound. The electronic configurations of X and Y are …
- Question 5
Which molecule has the largest number of electrons involved in covalent bonds? …
- Question 6
X is the arrangement of bonds around a carbon atom in graphite. Y is the arrangement of bonds around a carbon atom in diamond. Z is the arrangement of bonds around a silicon atom in silicon(IV) oxide, SiO2. Which arrangements …
- Question 7
What is the equation for the reaction between sodium carbonate and dilute nitric acid? A NaCO3 + H2NO3 → NaNO3 …
- Question 8
Which statements about relative atomic mass and relative molecular mass are correct? 1 The mass of the different isotopes does not affect relative atomic masses. 2 Only covalent compounds have a relative molecular mass. 3 Relative atomic masses are compared …
- Question 9
Aqueous hydrogen peroxide, H2O2, decomposes slowly at 25 °C. 2H2O2(aq) …
- Question 10
The diagram shows the structures of the atoms of two elements, X and Z. X and Z are not the atomic symbols for these elements. …
- Question 11
Which compound contains 45.2% nitrogen by mass? [Ar: …
- Question 12
Aqueous copper(II) sulfate is electrolysed using copper electrodes. The current is constant and the anode is weighed at regular time intervals. Which graph is obtained when the mass of the anode is plotted against time? mass of anode time A …
- Question 13
What is a chemical product of a hydrogen–oxygen fuel cell? A electricity B hydrogen C oxygen D water
- Question 14
Hydrogen can be produced by reacting methane with steam. CH4 …
- Question 15
What is the best way of slowing down the reaction between magnesium and sulfuric acid? A adding a catalyst to the reactants B diluting the acid used in the reaction C stirring the reagents D using magnesium powder instead of …
- Question 16
The volume of gas produced by the reaction of 100 cm3 of hydrochloric acid with an excess of calcium carbonate is measured in two experiments. The volumes of gas are measured at r.t.p. and the results are shown. time …
- Question 17
Hydrogen is made industrially by the reaction shown. CO(g) + H2O(g) CO2(g) …
- Question 18
The table refers to two important industrial gaseous reactions. reaction reactants product catalyst 1 hydrogen + nitrogen ammonia nickel 2 oxygen + sulfur dioxide sulfur trioxide vanadium(V) oxide Which catalysts are correctly stated? reaction 1 reaction 2 A no no …
- Question 19
Iron(II) ions react with chlorine. 2Fe2+(aq) + Cl 2(g) → 2Fe3+(aq) + 2Cl –(aq) Which statement about this reaction is correct? A Chlorine is reduced by iron(II) ions. B Chlorine is the reducing agent. C Iron(II) ions are reduced by …
- Question 20
Which reagent and observation describes the test for a reducing agent? reagent colour change A acidified aqueous potassium manganate(VII) colourless to purple B acidified aqueous potassium manganate(VII) purple to colourless C aqueous potassium iodide colourless to purple D aqueous potassium …
- Question 21
Compound X is a gas at room temperature. X dissolves in water to give a solution with a pH of 4. Which statement about compound X is correct? A An aqueous solution of X will not conduct electricity. B Atoms …
- Question 22
Which statement about hydrochloric acid is correct? A Hydrochloric acid reacts with magnesium carbonate to form three different products. B Hydrochloric acid reacts with magnesium to form magnesium chloride and water. C When hydrochloric acid is added to a colourless …
- Question 23
The addition of calcium hydroxide to soil reduces its acidity but also reduces the efficiency of fertilisers. Which two equations explain this? 1 Ca(OH)2(s) + CO2(g) → CaCO3(s) …
- Question 24
Which anions are contained in salts that are always soluble in water? A carbonates B chlorides C nitrates D sulfates
- Question 25
The element phosphorus, P, is immediately below nitrogen in the Periodic Table. It forms an oxide with the empirical formula P2O5. From the position of phosphorus in the Periodic Table, the element is expected to be 1 and the bonds …
- Question 26
Which statement is correct? A Group I elements are less reactive than the Group II element in the same period because they only need to lose one electron to have complete shells. B Group I elements are stored under oil …
- Question 27
The table shows some properties of transition elements and the reasons why they have these properties. Which row shows a correct property and the reason why transition elements show this property? property reason A iron has two common oxidation states …
- Question 28
Which equation is correct? A Cu(s) …
- Question 29
Metal X reacts with cold water to form a gas. Zinc displaces metal Y from solutions of its salts. The carbonate of metal Z is insoluble. What could be the identities of X, Y and …
- Question 30
Which statement about alloys is correct? A They are compounds of two or more metals. B They are mixtures of metals with other metals or non-metals. C They conduct electricity because they have ionic bonds between the metal atoms. D …
- Question 31
Pieces of magnesium can be attached to the steel hull of a ship to prevent rusting. This is sacrificial protection. Which statements about sacrificial protection are correct? 1 Iron atoms gain electrons and form hydrated iron(III) oxide. 2 Magnesium atoms …
- Question 32
Why is carbon used in water purification? A It acts as a filter to remove insoluble solids. B It adds oxygen to the water. C It disinfects the water. D It removes tastes and odours.
- Question 33
Which statement about air pollutants is correct? A Catalytic converters in vehicles change a toxic gas into a non-toxic gas. B Flue gas desulfurisation uses calcium nitrate. C Photosynthesis is a process that releases carbon dioxide. D Sulfur dioxide is …
- Question 34
What is the structural formula of propyl methanoate? A CH3COOCH2CH2CH3 B CH3COOCCH2CH3 C CH3CH2COOCH3 D CH3CH2CH2OOCH
- Question 35
Which statement about ethane is correct? A Each ethane molecule contains exactly seven bonds, all of which are single covalent bonds. B Ethane is a member of the homologous series of alkanes, a family of unsaturated hydrocarbons. C The equation …
- Question 36
Isoprene is an alkene which is commonly found in plants. Which properties does isoprene have? 1 It burns in air. 2 It can form polymers. 3 It decolourises aqueous bromine. …
- Question 37
The structure of an ester is shown. …
- Question 38
25.0 cm3 of 1.0 mol / dm3 sodium hydroxide is titrated with dilute sulfuric acid, using a suitable indicator. 25.0 cm3 of the sulfuric acid is required to reach the end-point. What is the concentration of the sulfuric acid and …
- Question 39
The results of a paper chromatography experiment are shown. X is an aqueous solution of a salt of a Group I element. Y is an aqueous solution of a salt of a transition element. baseline solvent front Y X Which …
- Question 40
Aqueous sodium hydroxide is used to identify the ions present in aqueous solutions of compounds Q and R. The results are shown. Q coloured solution before addition of aqueous sodium hydroxide after addition of a few drops of aqueous sodium …
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