Cambridge O Level · 5070 · Paper 1 · Multiple choice
Chemistry 5070/12 May/June 2019 past paper
Cambridge O Level Chemistry (5070) Paper 1 (Multiple choice), variant 2, May/June 2019: the question paper and its official mark scheme, 40 questions, with the grade thresholds. Free to open, no account needed.
- Questions
- 40
- Marks
- 40
- Grade A from
- 29
File names: 5070_s19_qp_12 · 5070_s19_ms_12
Grade thresholds for 5070/12 May/June 2019
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 |
|---|---|---|---|---|
| 29 | 23 | 17 | 14 | 12 |
Topics in this paper
Which syllabus chapters 5070/12 May/June 2019 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 5070/12 May/June 2019
- Question 1
The diagrams show four different methods of collecting gases. …
- Question 2
After acidification with dilute nitric acid, a colourless solution of X reacts with aqueous silver nitrate to give a white precipitate. What could X be? A calcium iodide B copper(II) chloride C lead(II) iodide D sodium chloride
- Question 3
The diagram represents a chromatogram of the colourless acids present in a drink. The chromatogram has been treated with a locating agent. A table of Rf values for the possible acids is given. …
- Question 4
Which gas will diffuse at the fastest rate at the same temperature and pressure? A Ar …
- Question 5
Two particles, K+ and Ar, can be written as …
- Question 6
A mineral deposit is found to contain small grains made entirely of the element carbon. Which property will definitely be true of the grains of carbon? A They will be made of atoms arranged in layers. B They will be …
- Question 7
Which diagram shows the outer electron arrangement in calcium fluoride? F F Ca F– Ca2+ an electron from calcium an electron from fluorine key …
- Question 8
How many shared pairs of electrons are there in one carbon dioxide molecule? …
- Question 9
Two statements about metals are given. 1 Metals contain a lattice of negative ions in a ‘sea of electrons’. 2 The electrical conductivity of metals is related to the mobility of the electrons in the structure. Which is correct? A …
- Question 10
Powdered calcium carbonate reacts with dilute hydrochloric acid to produce calcium chloride, water and carbon dioxide. What is the correct ionic equation, including state symbols, for this reaction? A CaCO3(s) + 2HCl (aq) → CaCl 2(aq) …
- Question 11
Which mass of carbon contains the same number of atoms as 16.0 g of sulfur? …
- Question 12
3.0 dm3 of sulfur dioxide is reacted with 2.0 dm3 of oxygen. 2SO2(g) …
- Question 13
A sample of magnesium hydroxide, Mg(OH)2, is made by adding an excess of aqueous sodium hydroxide to an aqueous solution containing 1.20 g magnesium sulfate, MgSO4. The mass of magnesium hydroxide formed is 0.26 g. What is the percentage yield …
- Question 14
When concentrated aqueous sodium chloride is electrolysed using inert electrodes, which product is formed at the cathode and which product is formed at the anode? cathode product anode product A hydrogen chlorine B hydrogen oxygen C sodium chlorine D sodium …
- Question 15
Which negative ions are present in aqueous copper(II) sulfate? A copper(II) ions and hydrogen ions B copper(II) ions only C sulfate ions and hydroxide ions D sulfate ions only
- Question 16
The diagram shows the energy profile of a chemical reaction. energy progress of reaction reactants products Which row is correct? the reaction that is endothermic the reaction with greater activation energy A backward reaction backward reaction B backward reaction forward …
- Question 17
The table shows the energy released by the complete combustion of some compounds. compound formula Mr ∆H in kJ / mol benzene …
- Question 18
An experiment is carried out to measure the rate of reaction between magnesium and dilute hydrochloric acid under two different conditions. The mass of magnesium and the number of moles of hydrochloric acid are the same in both experiments. Graphs …
- Question 19
Hydrogen peroxide decomposes slowly at room temperature. 2H2O2(aq) …
- Question 20
Reduction can be defined in terms of the gain or loss of oxygen or of hydrogen or of electrons. Which row correctly describes all three definitions of reduction? oxygen hydrogen electrons A gain loss loss B gain loss gain C …
- Question 21
Why is ethanoic acid described as a weak acid? A It is an organic acid. B It is a poor conductor of electricity. C It is only slightly dissociated in water. D It reacts only with very reactive metals.
- Question 22
What is the best method to prepare a sample of silver chloride? A Add silver nitrate to chlorine. B Add silver to hydrochloric acid. C Burn silver in chlorine. D Mix aqueous solutions of silver nitrate and sodium chloride.
- Question 23
The nitrogenous fertiliser urea has the structure shown. …
- Question 24
Ammonia is manufactured by the Haber process. …
- Question 25
Which uses for sulfuric acid are correct? 1 as a bleach in the manufacture of wood pulp for paper 2 as a food preservative in tinned foods 3 as a raw material in the manufacture of detergents 4 as a …
- Question 26
The atomic number of element X is 12. What is the formula of the chloride of X? A X2Cl B XCl C XCl 2 D XCl 4
- Question 27
Which property is common to 40Ca, 39K and 23Na? A Their atoms all have more neutrons than protons. B Their ions all have eight electrons in their outer shell. C They all sink when added to water. D They are …
- Question 28
Which statement about transition elements is correct? A Their soluble salts usually form coloured aqueous solutions. B They are all in the same group of the Periodic Table. C They are non-metals with high melting points. D They can be …
- Question 29
Three different elements react by losing electrons. The ions formed all have the electronic configuration 2,8. Which statement about these elements is correct? A They are in the same group. B They are in the same period. C They are …
- Question 30
Metal M is displaced from aqueous M nitrate by copper. Which statement about metal M and its compounds is correct? A M carbonate is stable when heated. B M oxide is reduced to M by heating with carbon. C M …
- Question 31
Which statement about some of the gases present in air is correct? A Dry air contains about 78% of oxygen. B Methane is produced by the incomplete combustion of fossil fuels. C Sulfur dioxide is released by volcanoes. D The …
- Question 32
Which treatment process is used to disinfect water? A adding carbon B chlorination C desalination D filtration
- Question 33
A molecule of compound Q has three C–C single bonds and ten C–H bonds only. It has no other bonds. Which statement about compound Q is correct? A It can be polymerised. B It decolourises bromine water. C It has …
- Question 34
Which organic compound requires the least number of moles of oxygen for the complete combustion of one mole of the compound? A C3H7OH B C3H7COOH …
- Question 35
Which reaction is an addition reaction? A making ethane and ethene from butane B making ethene and hydrogen from butane C the manufacture of margarine from a vegetable oil D the reaction between ethene and oxygen, giving carbon dioxide and …
- Question 36
Two equations involving ethanol are shown. 1 ethanol + oxygen carboxylic acid oxidation 2 glucose ethanol + carbon dioxide fermentation Which row is correct? molecular formula of carboxylic acid in 1 a catalyst is needed A CH3CO2H 1 only B …
- Question 37
What is the empirical formula of ethanoic acid? A CH2O B CH4O …
- Question 38
Which structure represents propyl methanoate? …
- Question 39
Monomer Z is used to make poly(chloroethene). monomer …
- Question 40
Terylene, a man-made fibre, is used to make clothing. Which row correctly describes how Terylene is manufactured? starting materials type of polymerisation A an acid and an alcohol addition B an acid and an alcohol condensation C an alkene addition …
Other Chemistry papers from May/June 2019
- 5070/11 Multiple choice
- 5070/21 Theory
- 5070/22 Theory
- 5070/41 Alternative to Practical
- 5070/42 Alternative to Practical