Cambridge O Level · 5070 · Paper 1 · Multiple choice
Chemistry 5070/12 Oct/Nov 2018 past paper
Cambridge O Level Chemistry (5070) Paper 1 (Multiple choice), variant 2, Oct/Nov 2018: 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
- 30
File names: 5070_w18_qp_12 · 5070_w18_ms_12
Grade thresholds for 5070/12 Oct/Nov 2018
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 |
|---|---|---|---|---|
| 30 | 24 | 18 | 15 | 13 |
Topics in this paper
Which syllabus chapters 5070/12 Oct/Nov 2018 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 5070/12 Oct/Nov 2018
- Question 1
When heated, magnesium reacts with oxygen in the air to form magnesium oxide, a white powder. A student investigates the change in mass that occurs during this reaction. He is given a balance and the three sets of apparatus shown. …
- Question 2
Four substances are heated gently. The temperatures at which they start and finish melting are recorded. substance temperature start melting / °C finish melting …
- Question 3
A substance dissolves in water to form a colourless solution. This solution reacts with aqueous silver nitrate in the presence of dilute nitric acid to give a yellow precipitate. What is the possible identity of the substance? A calcium iodide …
- Question 4
Which statements are correct? 1 The volume of a gas at constant pressure increases as the temperature increases. 2 The rate of diffusion of a gas increases as the temperature increases. 3 The pressure of a gas at constant volume …
- Question 5
Which particle contains the greatest number of electrons? A Mg2+ …
- Question 6
Which substance has a giant covalent structure at room temperature? A methane B sand C sodium chloride D water
- Question 7
One atom of element X and two atoms of element Y react to form an ionic compound. Element X forms a positive ion. Which elements could X and Y be? …
- Question 8
An element with a high melting point forms an oxide that is gaseous at room temperature. Which type of structure or bonding is present in the element? A giant covalent B ionic C metallic D simple molecular
- Question 9
Which statement explains why aluminium is malleable? A Aluminium has layers of cations that can slide over one another. B Aluminium has layers of electrons that can slide over one another. C Aluminium has weak bonds between protons and a …
- Question 10
The incomplete equation for the reaction between ethyne, C2H2, and oxygen is shown. …
- Question 11
A compound contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen by mass. The relative molecular mass of the compound is between 55 and 65. What is the molecular formula of the compound? A CH2O …
- Question 12
What is observed during the electrolysis of aqueous copper(II) sulfate using carbon electrodes? A A pink solid is deposited on the anode. B Bubbles form on the negative electrode. C The colour of the solution fades. D The negative electrode …
- Question 13
Four processes using electrolysis are listed. 1 the electrolysis of concentrated aqueous sodium chloride 2 the electrolysis of dilute sulfuric acid 3 the extraction of aluminium from pure aluminium oxide 4 the purification of copper using aqueous copper(II) sulfate Which …
- 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
A fuel is completely burned in air. Carbon dioxide, water and heat are produced. Which energy profile diagram is correct for burning a fuel? energy progress of reaction A fuel + oxygen CO2 …
- Question 16
The equation shows the reaction for the manufacture of ammonia. …
- Question 17
Solid ammonium chloride is heated. The gases ammonia and hydrogen chloride are formed. This is reaction 1. Ammonia gas is mixed with hydrogen chloride gas. Solid ammonium chloride is formed. This is reaction 2. Which statement is correct? A Both …
- Question 18
In a closed flask, gases Q and R reach a dynamic equilibrium. …
- Question 19
Which reaction is a redox reaction? A Mg + 2HCl → MgCl …
- Question 20
Three separate mixtures of a solution and a solid are made, as shown in the table. The mixtures are warmed. In which mixtures does gas form? NaOH(aq) and NH4Cl (s) H2SO4(aq) and NH4Cl (s) H2SO4(aq) and Mg(s) …
- Question 21
The carbonate, chloride and sulfate of a metal are all soluble in water. What is the metal? A barium B calcium C potassium D silver
- Question 22
Which fertiliser contains the highest percentage of nitrogen by mass? A ammonium nitrate, NH4NO3; formula mass is 80 B ammonium phosphate, (NH4)3PO4; formula mass is 149 C ammonium sulfate, (NH4)2SO4; formula mass is 132 D potassium nitrate, KNO3; formula mass …
- Question 23
Which set of conditions is used in the contact process? temperature / °C pressure / atm catalyst …
- Question 24
The diagram shows part of the Periodic Table. …
- Question 25
The Group I metals lithium, sodium and potassium show trends in their melting points and in their reactions with water. Which statement is correct going down the group from lithium to potassium? A Their melting points decrease and their reaction …
- Question 26
From their position in the Periodic Table, which properties would you expect the elements vanadium, chromium and cobalt to have? 1 variable oxidation states 2 coloured compounds 3 high melting points …
- Question 27
The diagram shows the structure of an alloy. Which statement about alloys is correct? A Alloys can only be formed by mixing copper or iron with other metals. B High carbon steel alloys are soft and easily shaped. C In …
- Question 28
Which pair of reagents will undergo a displacement reaction? A Ag(s) and CuSO4(aq) B Cu(s) and MgSO4(aq) C Mg(s) and CaSO4(aq) D Zn(s) and CuSO4(aq)
- Question 29
The reactivity series for some metals, with two gaps labelled X and Y, is shown. most reactive least reactive K Na Ca Mg X Zn Y Pb (H) Cu Ag Which row correctly identifies metals X and Y and the …
- Question 30
Iron can be extracted from the ore haematite, Fe2O3. What is the maximum mass of iron that could be produced from 500 kg of haematite? [Ar: O, 16; Fe, …
- Question 31
Aluminium is used to make saucepans because of its apparent lack of reactivity. Which property of aluminium explains its unreactivity? A It has a layer of oxide on its surface. B It has a low density. C It is a …
- Question 32
Pollutant gases are released by the bacterial decay of vegetable matter. The bacterial decay of vegetable matter is the main source of which gas? A carbon monoxide B methane C nitrogen dioxide D sulfur dioxide
- Question 33
Several different treatments are used to purify the water supply. Which impurities can be removed by which treatment? filtration use of carbon chlorination A harmful microbes solids unpleasant odours and tastes B harmful microbes unpleasant odours and tastes solids C …
- Question 34
Which statement about the homologous series of alkanes is correct? A Alkanes are unsaturated hydrocarbons. B Alkanes all have the general formula CnH2n. C The boiling points decrease as the number of carbon atoms per molecule increases. D The liquid …
- Question 35
Which compound has the empirical formula with the greatest relative formula mass? …
- Question 36
Which statement about vegetable oil and the margarine made from it is correct? A Both are liquids at room temperature. B Both occur naturally. C Margarine has the higher melting point. D Vegetable oil has fewer carbon-carbon double bonds than …
- Question 37
When ethene reacts with steam to form ethanol, which type of reaction takes place? A addition B fermentation C polymerisation D reduction
- Question 38
An ester is formed from a carboxylic acid and an alcohol. How does the number of carbon, hydrogen and oxygen atoms in an ester differ from the total number of these atoms in the carboxylic acid and alcohol from which …
- Question 39
Poly(lactic) acid is a polymer used to make biodegradable cups. The partial structure of poly(lactic) acid is shown. …
- Question 40
Two large molecules, P and Q, both contain the same linkage. P occurs naturally but Q does not. Which row could be P and …
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