Cambridge O Level · 5070 · Paper 1 · Multiple choice
Chemistry 5070/12 Oct/Nov 2022 past paper
Cambridge O Level Chemistry (5070) Paper 1 (Multiple choice), variant 2, Oct/Nov 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
- 25
File names: 5070_w22_qp_12 · 5070_w22_ms_12
Grade thresholds for 5070/12 Oct/Nov 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 |
|---|---|---|---|---|
| 25 | 20 | 16 | 14 | 12 |
Topics in this paper
Which syllabus chapters 5070/12 Oct/Nov 2022 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 5070/12 Oct/Nov 2022
- Question 1
Which piece of apparatus would be the most suitable for measuring exactly 37.00 cm3 of aqueous ammonia? …
- Question 2
When iron reacts with dilute hydrochloric acid, hydrogen is formed. Impurities in the iron mean that some hydrogen sulfide gas is also formed. Hydrogen sulfide gas is soluble in water. Water vapour can be removed from a mixture of gases …
- Question 3
The following tests are carried out on a sample of green crystals. The crystals are dissolved in water and the resulting solution is divided into two portions. ● Aqueous sodium hydroxide is added to the first portion. A green precipitate, …
- Question 4
Changes of state occur between solids, liquids and gases. gas liquid solid …
- Question 5
The table shows information about some oxides. structure effect of water oxide simple molecular dissolves to form an acid For which of the elements nitrogen, phosphorus, sulfur and silicon could this information about their oxides be correct? A phosphorus and …
- Question 6
Which statement about iodine atoms and iodide ions is correct? A They are both isotopes of iodine. B They undergo the same chemical reactions. C They have the same number of protons. D They have the same physical properties.
- Question 7
The table contains information about four substances. Which substance is an ionic compound? state at room temperature conducts electricity at room temperature conducts electricity when molten conducts electricity when in aqueous solution A liquid …
- Question 8
What is the nucleon number of the isotope of uranium, …
- Question 9
An ionic compound has the formula Al 2O3. What are the charges on the ions? A Al …
- Question 10
Which two pairs of atoms are held together by the same number of bonds? first pair of atoms second pair of atoms A the two carbon atoms in a C2H4 molecule the carbon atom and one oxygen atom in a …
- Question 11
Boron trifluoride, BF3, is a simple molecule. There are three covalent bonds in each BF3 molecule. Each of these bonds is made by sharing one electron from the boron atom and one electron from a fluorine atom. What is unusual …
- Question 12
Which equation is correct for the reaction between carbon dioxide and magnesium hydroxide? A CO2 + Mg(OH)2 → MgCO3 …
- Question 13
Which mass of oxygen gas combines with exactly 16 g of sulfur to form sulfur dioxide, SO2? …
- Question 14
Which compound has an empirical formula that is different from its molecular formula? A butanol, C4H10O B hydrogen peroxide, H2O2 C nitrogen dioxide, NO2 D water, H2O
- Question 15
4.0 g of sodium hydroxide, NaOH, is dissolved in 250 cm3 of water in a graduated flask. A 25 cm3 sample of this solution is titrated with 0.50 mol / dm3 hydrochloric acid. Which volume of hydrochloric acid is required …
- Question 16
Dilute aqueous solutions of potassium chloride and magnesium chloride are mixed together. A sample of the mixture is electrolysed using inert electrodes. What are possible products at each of the electrodes? anode cathode A chlorine oxygen B chlorine potassium C …
- Question 17
The table gives some statements about electrolysis and the reason why each statement is true. Which row shows a correct statement and the correct reason why the statement is true? statement reason A Aqueous copper(II) sulfate and aqueous copper(II) nitrate …
- Question 18
Students proposed four cells to produce electricity in a school laboratory. Which cell would produce the largest voltage in a safe way? V Cu Zn CuSO4(aq) …
- Question 19
Nitrogen oxides may form in the atmosphere during lightning activity. …
- Question 20
Which two processes are both endothermic? A combustion and cracking B combustion and fermentation C cracking and photosynthesis D respiration and photosynthesis
- Question 21
Magnesium reacts with dilute sulfuric acid. Mg(s) + H2SO4(aq) → MgSO4(aq) + H2(g) Which changes in the conditions will result in the lowest rate of production of hydrogen? acid concentration solid particle size temperature A decrease decrease increase B decrease …
- Question 22
Carbonates react with dilute acids to produce carbon dioxide. A student uses excess carbonate and 100 cm3 of 0.1 mol / dm3 acid and measures the volume of gas produced at regular time intervals. The results give line X on …
- Question 23
In the Contact process, sulfur is converted into sulfuric acid. A catalyst is added to the reaction mixture shown in the equation. 2SO2 + O2 2SO3 What is the purpose of the catalyst? A to lower the activation energy for …
- Question 24
Which change involves reduction? A calcium carbonate to calcium oxide B copper to brass C ethene to poly(ethene) D sand to silicon
- Question 25
Under certain conditions, iron reacts with chlorine to form iron(III) chloride. 2Fe + 3Cl 2 → 2FeCl 3 Which statement about this reaction is correct? A Chlorine is the oxidising agent. B Iron gains electrons. C Iron is reduced. D …
- Question 26
The equation shows a reaction in the Contact process. 2SO2(g) + O2(g) 2SO3(g) …
- Question 27
The table shows the pH values of some substances that can be consumed by humans. substance pH value …
- Question 28
Solution X is added to a solid salt, causing gas Y to be evolved. Gas Y dissolves in water resulting in a solution with a pH of less than 7. What are the possible identities of X and …
- Question 29
Which substance reacts with dilute sulfuric acid in the preparation of a pure sample of lead(II) sulfate? A aqueous lead(II) nitrate B lead foil C powdered lead(II) carbonate D powdered lead(II) oxide
- Question 30
A pure sample of a salt is obtained by filtration followed by evaporation of the filtrate. Which pair of reagents would produce the salt? A copper and hydrochloric acid B excess copper(II) carbonate and hydrochloric acid C aqueous silver nitrate …
- Question 31
Which set of conditions is used in the Contact process? temperature / °C pressure / atm catalyst …
- Question 32
Part of the Periodic Table is shown. Which substance is an unreactive gas found in the atmosphere? …
- Question 33
Iron is obtained in the blast furnace from the ore haematite. Which statement is correct? A Calcium carbonate is used to remove acidic impurities. B Coke is reduced to carbon dioxide. C Haematite is oxidised by carbon monoxide. D Haematite …
- Question 34
Pollution may be caused by oxides of carbon, nitrogen and sulfur. Which elements can each form more than one oxide? A carbon, nitrogen and sulfur B carbon and nitrogen only C carbon and sulfur only D nitrogen and sulfur only
- Question 35
A river runs through an area of land that is used for growing cotton. The cotton farmers applied a large amount of fertiliser to their fields. This caused eutrophication in the river water. Which statement is correct? A Decreased levels …
- Question 36
Which compound is an alkane? A CH2CHCH2CH3 B CH3CH(CH3)CH3 C CH3CHCHCH3 D (CH3)2CCH2
- Question 37
The equation shows the reaction that takes place when butanol is completely combusted in air. C4H9OH(l) + xO2(g) → yCO2(g) + zH2O(g) What are the values of x, y and …
- Question 38
Propanoic acid reacts with calcium carbonate. The products of this reaction are calcium propanoate, carbon dioxide and water. What is the equation for this reaction? A 2C2H5COOH + Ca2CO3 → 2C2H5COOCa + CO2 …
- Question 39
Which row shows all the elements present in the polymers listed? • nylon • poly(ethene) • Terylene nylon poly(ethene) Terylene …
- Question 40
The partial structure of a polyamide is shown. …
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