Cambridge O Level · 5070 · Paper 1 · Multiple choice
Chemistry 5070/11 Oct/Nov 2020 past paper
Cambridge O Level Chemistry (5070) Paper 1 (Multiple choice), variant 1, Oct/Nov 2020: 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
- 27
File names: 5070_w20_qp_11 · 5070_w20_ms_11
Grade thresholds for 5070/11 Oct/Nov 2020
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 |
|---|---|---|---|---|
| 27 | 22 | 17 | 15 | 13 |
Topics in this paper
Which syllabus chapters 5070/11 Oct/Nov 2020 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 5070/11 Oct/Nov 2020
- Question 1
A student needs to measure 17.60 cm3 of hydrochloric acid. The student has access to the apparatus commonly found in a school laboratory. Which piece of equipment should be used to measure the 17.60 cm3 of hydrochloric acid? A a …
- Question 2
When calcium carbonate is added to dilute hydrochloric acid, carbon dioxide gas is released. Three sets of apparatus are shown. CaCO3(s) + HCl (aq) gas syringe CaCO3(s) + HCl (aq) water measuring cylinder thistle funnel mass balance tap funnel …
- Question 3
Some substances may be separated using paper chromatography. The diagram shows the results of running two mixtures in a suitable solvent. Which spot has an Rf value of 0.37? solvent front starting line …
- Question 4
Petroleum (crude oil) is separated into useful fractions by fractional distillation. The positions at which fractions X and Y are collected from the fractionating column are shown. petroleum fractions X Y Which statement is correct? A The temperature increases up …
- Question 5
Compound X is a crystalline solid at room temperature and pressure. An aqueous solution of X is tested as shown. test test result acidify with dilute nitric acid, then add aqueous barium nitrate no visible change add aqueous ammonia white …
- Question 6
When aqueous sodium hydroxide is added to a solution, a white precipitate forms which dissolves when excess sodium hydroxide is added. Which ion could be present in the solution? A Al 3+(aq) B Ca2+(aq) C Cu2+(aq) D Na+(aq)
- Question 7
Why does a balloon full of helium gas become smaller as the temperature changes from 30 C to …
- Question 8
The diagram of an ion is shown. + nucleus What can be deduced about the number of protons in this ion? A It has 9 protons. B It has 10 protons. C It has 11 protons D You cannot deduce …
- Question 9
The circuit diagram shows an experiment using a rod of copper and a rod of graphite. switch rod of copper rod of graphite bulb When the switch is closed, the bulb lights because an electric current flows through the copper …
- Question 10
Which material has the highest melting point? A ammonia B methane C sodium chloride D water
- Question 11
Which statement describes ionic bonds? A a lattice of ions in a ‘sea of electrons’ B electrostatic attraction between oppositely charged ions C the sharing of electrons between atoms to gain a noble gas configuration D the transfer of electrons …
- Question 12
The diagram shows the covalent bonds in an organic compound. …
- Question 13
Which contains the greatest mass of oxygen? A 0.2 mol of aluminium nitrate, Al (NO3)3 B 0.3 mol of potassium sulfate, K2SO4 C 0.4 mol of sodium nitrate, NaNO3 D 0.5 mol of magnesium carbonate, MgCO3
- Question 14
Compound X has a composition by mass of 63.6 % nitrogen and 36.4 % oxygen. What is the empirical formula of …
- Question 15
The table gives the relative formula mass of four compounds and the mass of each compound present in 1 dm3 of solution. Which solution has the highest concentration in mol / dm3? solution relative formula mass mass of compound in …
- Question 16
Which sample contains the most atoms? A 0.5 mol of water B 1.0 mol of carbon dioxide C 1.0 mol of methane D 2.0 mol of hydrogen chloride
- Question 17
The diagrams show the structures of ethene and propene. ethene propene …
- Question 18
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 19
Concentrated aqueous sodium chloride is electrolysed using inert electrodes. Which row shows what happens in this electrolysis and why it happens? change occurring explanation A oxygen is discharged at the anode OH–(aq) loses electrons more easily than does Cl –(aq) …
- Question 20
The energy profile 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? energy progress of …
- Question 21
Which statement describes the conversion of magnesium atoms to magnesium ions? A The change is reduction because there has been a gain of electrons. B The change is oxidation because there has been a loss of electrons. C The change …
- Question 22
When water is liquid, it ionises slightly. H2O(l) H+(aq) + OH–(aq) The forward reaction is endothermic. When the temperature of water is increased, which changes take place? 1 The water becomes acidic. 2 The water becomes alkaline. 3 More water …
- Question 23
Which row correctly describes the solubilities of both ammonium sulfate and sodium carbonate in water? solubility of ammonium sulfate solubility of sodium carbonate A insoluble insoluble B insoluble soluble C soluble insoluble D soluble soluble
- Question 24
Lead(II) chloride is an insoluble salt. Which two reagents are used to prepare a pure sample of lead(II) chloride? A lead(II) carbonate and dilute hydrochloric acid B lead metal and dilute hydrochloric acid C aqueous lead(II) nitrate and dilute hydrochloric …
- Question 25
The Haber process is used to make ammonia. Which catalyst is used in the Haber process? A iron B nickel C platinum D vanadium(V) oxide
- Question 26
Some compounds containing nitrogen are used as fertilisers. The table shows some nitrogen-containing compounds, whether they are used as a fertiliser or not and a reason for this. Which row is correct? compound used as a fertiliser reason A aqueous …
- Question 27
An atom of which element has the same electronic configuration as an atom of an ion of strontium? A calcium B krypton C rubidium D selenium
- Question 28
Metals are elements that have many similar properties because of their structure. Which statement about metals is correct? A Metals are malleable because the layers of atoms can slide over each other. B Metals conduct electricity because their ions vibrate …
- Question 29
What happens when a strip of silver is immersed in aqueous copper(II) sulfate? A Bubbles of gas will appear. B No reaction occurs. C Pink copper will be deposited on the silver strip. D The silver strip will start to …
- Question 30
Four metals and hydrogen are arranged in order of decreasing reactivity. potassium decreasing reactivity aluminium zinc hydrogen copper Which statement about these elements is correct? A Aluminium is formed when aluminium oxide is heated with hydrogen. B Copper displaces zinc …
- Question 31
Iron is extracted from haematite in a blast furnace. Coke and limestone are added to the blast furnace. What is the function of the limestone? A It decomposes and neutralises acidic impurities. B It is a fuel which heats the …
- Question 32
Carbon dioxide, methane and oxygen are gases involved in the carbon cycle. Which of these gases may contribute to global warming? A carbon dioxide only B carbon dioxide and methane C carbon dioxide and oxygen D methane only
- Question 33
Two statements about the water in lakes are given. statement 1 Fish are unable to live in some lakes because there is insufficient oxygen in the water. statement 2 Fertilisers can be washed into lakes where they cause eutrophication. What …
- Question 34
Chlorine reacts with methane. Which row is correct? chemical equation conditions required A Cl 2 + CH4 CH2Cl …
- Question 35
Which statements about alkenes are correct? 1 They have the general formula of CnH2n. 2 They undergo addition reactions with steam. 3 They burn in air to form carbon dioxide and water. A 1 and 2 only B 1 and …
- Question 36
X is a branched hydrocarbon with the ratio of carbon atoms to hydrogen atoms being …
- Question 37
The reactions listed all involve ethanol. 1 C2H5OH …
- Question 38
Ethanoic acid is reacted with propanol. What is the name and what is the structure of the ester produced? name structure A propyl ethanoate …
- Question 39
The diagram shows the partial structure of a polymer. …
- Question 40
The diagram shows the repeat unit of a polymer. …
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