Cambridge IGCSE · 0620 · Paper 2 · Multiple choice (Extended)
Chemistry 0620/23 Oct/Nov 2016 past paper
Cambridge IGCSE Chemistry (0620) Paper 2 (Multiple choice (Extended)), variant 3, Oct/Nov 2016: 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
- 26
File names: 0620_w16_qp_23 · 0620_w16_ms_23
Grade thresholds for 0620/23 Oct/Nov 2016
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 | F | G |
|---|---|---|---|---|---|---|
| 26 | 23 | 20 | 17 | 14 | 11 | 8 |
Topics in this paper
Which syllabus chapters 0620/23 Oct/Nov 2016 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/23 Oct/Nov 2016
- Question 1
‘Particles moving very slowly from an area of higher concentration to an area of lower concentration.’ Which process is being described? A a liquid being frozen B a solid melting C a substance diffusing through a liquid D a substance …
- Question 2
A student mixes 25 cm3 samples of dilute hydrochloric acid with different volumes of aqueous sodium hydroxide. In each case, the student measures the change in temperature to test if the reaction is exothermic. Which piece of apparatus is not …
- Question 3
A solid X is purified in five steps. The first four steps of the purification are shown in the diagram. step 1 step 2 step 3 step 4 heat solid X mixture Y In step 5, how is a pure …
- Question 4
An atom has three electron shells. There are three electrons in the outer shell. How many protons and how many neutrons are in this atom? protons neutrons …
- Question 5
Ethanol is a liquid at room temperature and boils at 78 °C. Sodium chloride is a solid at room temperature. Which statement about the bonding in ethanol and sodium chloride is not correct? A Each ethanol molecule is held together …
- Question 6
The molecules N2, C2H4, CO2 and CH3OH all have covalent bonds. These bonds consist of shared pairs of electrons. Which row gives the total number of shared pairs of electrons in the molecules shown? molecule total number of shared pairs …
- Question 7
Metals are malleable. Which statement explains why metals are malleable? A Metallic bonding is very strong. B Metals are good conductors of electricity. C Positive metal ions are arranged in a regular lattice structure. D The layers of positive metal …
- Question 8
The equation shows the complete combustion of propane. …
- Question 9
Sodium hydroxide reacts with sulfuric acid. The equation for the reaction is shown. 2NaOH + H2SO4 → Na2SO4 + 2H2O Which volume of 0.4 mol / dm3 sodium hydroxide reacts with 50.0 cm3 of 0.1 mol / dm3 sulfuric acid? …
- Question 10
Which apparatus could be used to electroplate an iron nail with copper? …
- Question 11
The diagram shows two different metal strips dipped into an electrolyte. V metal strips electrolyte Which pair of metals produces the highest voltage? A copper and iron B copper and magnesium C copper and zinc D magnesium and iron
- Question 12
10 g of ammonium nitrate are added to water at 25 °C and the mixture stirred. The ammonium nitrate dissolves and, after one minute, the temperature of the solution is 10 °C. Which word describes this change? A endothermic B …
- Question 13
The energy level diagram for a reaction is shown. energy reactants products …
- Question 14
An experiment X is carried out between a solid and a solution using the apparatus shown. gas syringe The volume of gas given off is measured at different times and the results plotted on a graph. In a second experiment …
- Question 15
Which change in conditions increases the energy of the particles in a reaction? A addition of a catalyst B increase in concentration C increase in surface area D increase in temperature
- Question 16
Chlorine can be manufactured by the following reaction. The reaction is exothermic. 4HCl …
- Question 17
Which change represents an oxidation reaction? A chlorine changes to chlorate(I) ions B chlorine changes to chloride ions C copper(II) ions change to copper D potassium manganate(VII) ions change to potassium manganate(VI) ions
- Question 18
Germanium oxide is a white powder. Germanium oxide reacts with concentrated hydrochloric acid. Germanium oxide reacts with concentrated aqueous sodium hydroxide. Germanium oxide does not dissolve when added to water. Which type of oxide is germanium oxide? A acidic B …
- Question 19
Hydrogen chloride gas reacts with water to produce an acidic solution. The equation for the reaction is shown. HCl …
- Question 20
The apparatus shown is used to prepare aqueous copper(II) sulfate. Y stirrer solid X aqueous copper(II) sulfate excess of solid X filter paper heat What are X and …
- Question 21
Information about some silver compounds is shown in the table. compound formula solubility in water silver carbonate Ag2CO3 insoluble silver chloride AgCl insoluble silver nitrate AgNO3 soluble silver oxide Ag2O insoluble Which equation shows a reaction which cannot be used …
- Question 22
What is not a property of Group I metals? A They are soft and can be cut with a knife. B They react when exposed to oxygen in the air. C They produce an acidic solution when they react with …
- Question 23
Compound T is added to dilute hydrochloric acid and warmed gently. The mixture gives off a gas which turns acidified aqueous potassium manganate(VII) from purple to colourless. A flame test on compound T gives a lilac flame. What is compound …
- Question 24
Part of the Periodic Table is shown. …
- Question 25
Basic oxides and oxygen are used to convert iron into steel. Which statement is not correct? A Carbon is converted into carbon dioxide. B Silicon is converted into silicon(IV) oxide. C The basic oxides react with acidic impurities to form …
- Question 26
The results of two experiments are given. 1 Cobalt displaces manganese from an aqueous solution of a manganese salt. 2 Manganese displaces silver from an aqueous solution of a silver salt. Three more experiments are carried out. 3 Cobalt is …
- Question 27
Cryolite, Na3Al F6, is added to aluminium oxide in the electrolytic extraction of aluminium. What is the reason for this? A to decrease the melting point of the electrolyte B to protect the anodes C to produce more aluminium D …
- Question 28
Different forms of steel contain different proportions of carbon. Steel P contains a high proportion of carbon. Steel Q contains a low proportion of carbon. Which statement is correct? A P is stronger and more brittle than …
- Question 29
Air is a mixture of gases. Which gas is present in the largest amount? A argon B carbon dioxide C nitrogen D oxygen
- Question 30
Which information about carbon dioxide and methane is correct? carbon dioxide methane A formed when vegetation decomposes key B greenhouse gas …
- Question 31
A metal, X, is used to make oil pipelines. X corrodes in air and water. X can be protected from corrosion by attaching blocks of element Y. Which statement is correct? A This process is known as galvanising. B Y …
- Question 32
The Haber process for the manufacture of ammonia occurs at 450 °C and 250 atmospheres. The nitrogen and hydrogen are supplied in a 1:3 ratio by volume. The reaction is exothermic. …
- Question 33
The following scheme shows four stages in the conversion of sulfur to sulfuric acid. In which stage is a catalyst used? oleum air air water sulfur sulfur dioxide sulfur trioxide concentrated sulfuric acid concentrated sulfuric acid stage B stage D …
- Question 34
Slaked lime is used to neutralise an acidic soil. How does the pH of the soil change? from to …
- Question 35
Which list shows the fractions obtained from distilling petroleum, in order of increasing boiling point? A bitumen → diesel oil → fuel oil → lubricating oil B diesel oil → gasoline → naphtha → kerosene C gasoline → naphtha → …
- Question 36
Butane reacts as shown. butane butene + hydrogen catalyst and heat What is this type of reaction? A combustion B cracking C polymerisation D reduction
- Question 37
Substance Z has the following characteristics. 1 It burns in an excess of oxygen to form carbon dioxide and water. 2 It is oxidised by air to form a liquid smelling of vinegar. 3 It reacts with carboxylic acids to …
- Question 38
Ethanol is manufactured by the catalytic addition of steam to ethene and by fermentation. Which row shows an advantage and a disadvantage of using the catalytic addition of steam to ethene compared to fermentation? advantage disadvantage A fast the product …
- Question 39
The organic compound shown can be polymerised. C CH3 Cl …
- Question 40
The partial structure of a polymer is shown. …
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