Cambridge IGCSE · 0620 · Paper 1 · Multiple choice (Core)
Chemistry 0620/12 May/June 2023 past paper
Cambridge IGCSE Chemistry (0620) Paper 1 (Multiple choice (Core)), variant 2, May/June 2023: 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
- 22
File names: 0620_s23_qp_12 · 0620_s23_ms_12
Grade thresholds for 0620/12 May/June 2023
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 |
|---|---|---|---|---|
| 22 | 19 | 16 | 14 | 12 |
Topics in this paper
Which syllabus chapters 0620/12 May/June 2023 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/12 May/June 2023
- Question 1
Four physical changes of ethanol are listed. 1 condensation 2 evaporation 3 freezing 4 boiling In which changes do the particles move further apart? A 1 and …
- Question 2
Which statement explains why water is a compound? A The hydrogen and oxygen atoms in a molecule of water can only be separated by chemical means. B The hydrogen and oxygen atoms in a molecule of water can be separated …
- Question 3
An atom of element X contains: ● 5 protons ● 6 neutrons ● 5 electrons. Which statements about element X are correct? 1 X has an atomic number of …
- Question 4
Which row describes properties of lithium fluoride? electrical conductivity when solid electrical conductivity when molten melting point A does not conduct conducts high B does not conduct does not conduct low C conducts conducts high D conducts does not conduct …
- Question 5
Ammonia, NH3, is a covalent molecule. Which diagram shows the outer-shell electron arrangement in a molecule of ammonia? …
- Question 6
Which substance has a giant covalent structure? A ethanol B graphite C methane D sodium chloride
- Question 7
Sodium burns in oxygen to form sodium oxide. What is the balanced equation for the reaction? A 4Na …
- Question 8
What is the relative formula mass of Mg(OH)2? …
- Question 9
Dilute sulfuric acid is electrolysed using inert electrodes. The apparatus is set up as shown. graphite cathode graphite anode + – dilute sulfuric acid 30 cm3 of a gas is collected at the cathode. A different gas is collected at …
- Question 10
Four statements about hydrogen fuel cells are listed. 1 The fuel cell converts chemical energy into electrical energy. 2 In the fuel cell, hydrogen combines with oxygen. 3 Carbon dioxide and water are produced in the fuel cell. 4 The …
- Question 11
5 g of four different fuels are set alight and placed under a beaker containing 50 cm3 of water. The temperature of the water is taken at the start and after five minutes. Which fuel releases the most energy? temperature …
- Question 12
Which changes increase the rate of reaction? 1 increasing the concentration of the reactants 2 increasing the particle size of a solid reactant 3 increasing the temperature …
- Question 13
Which reaction is reversible? A an iron nail rusting when left in moist air B limestone reacting with an acid to form carbon dioxide gas C magnesium burning in air to produce a white ash D white anhydrous copper(II) sulfate …
- Question 14
The equation for the reaction between iron(III) oxide and carbon is shown. 2Fe2O3 …
- Question 15
Copper(II) chloride is made when copper(II) carbonate reacts with dilute hydrochloric acid. What are the other products in this reaction? A water and carbon dioxide B carbon dioxide only C water and hydrogen D hydrogen only
- Question 16
Rubidium is in Group I and strontium is in Group II of the Periodic Table. Which row describes the nature of rubidium oxide, Rb2O, and strontium oxide, SrO? Rb2O SrO A acidic acidic B acidic basic C basic acidic D …
- Question 17
Magnesium sulfate is a soluble solid which is formed when insoluble magnesium oxide reacts with dilute sulfuric acid. Which method is used to prepare solid magnesium sulfate? A Excess sulfuric acid is reacted with magnesium oxide. The mixture is evaporated …
- Question 18
Q and R are elements in the same period of the Periodic Table. Q has 7 electrons in its outer shell and R has 2 electrons in its outer shell. Which statement about Q and R is correct? A Q …
- Question 19
Which statement about alkali metals is correct? A Lithium is more dense than sodium. B Sodium is more reactive than potassium. C Sodium has a higher melting point than potassium. D They are in Group II of the Periodic Table.
- Question 20
Aqueous bromine is added to aqueous sodium iodide. bromine + sodium iodide …
- Question 21
Which row describes the properties of a transition element? melting point density forms coloured compounds A high low no B high high yes C low low no D low low yes
- Question 22
Which row describes the properties of argon? property 1 property 2 A inert diatomic B inert monatomic C reactive diatomic D reactive monatomic
- Question 23
Which row identifies the properties of zinc? thermal conductivity reacts with dilute acid A good yes B good no C poor yes D poor no
- Question 24
Uses of metals depend on their properties. Which property is necessary for the use given? use of the metal property of the metal A car bodies ductile B cutlery conducts heat C food containers resists corrosion D overhead electrical cables …
- Question 25
Which compounds both contribute to acid rain? A carbon monoxide and carbon dioxide B carbon monoxide and oxides of nitrogen C oxides of nitrogen and sulfur dioxide D sulfur dioxide and carbon dioxide
- Question 26
P, Q, R and S are metals. P reacts with dilute hydrochloric acid, forming hydrogen. Q reacts violently with water. R reacts with water to give hydrogen. S is formed by heating its oxide with carbon. Which row identifies the …
- Question 27
Which compound is formed when iron rusts? A anhydrous iron(II) oxide B anhydrous iron(III) oxide C hydrated iron(III) hydroxide D hydrated iron(III) oxide
- Question 28
Which reaction in the blast furnace releases heat energy? …
- Question 29
A wax candle is made from a mixture of hydrocarbons. The candle is lit and placed in a gas jar along with a strip of cobalt(II) chloride test paper as shown. cobalt(II) chloride paper gas jar combustion products wax candle …
- Question 30
Urea, CO(NH2)2, is used as a fertiliser. Which element that plants need for improved plant growth is provided by urea? A carbon B hydrogen C nitrogen D oxygen
- Question 31
The percentage composition of gases on Neptune is shown. gas percentage composition / % hydrogen 80 helium 18 methane 1.5 other gases 0.5 Which statement about the atmospheres on Neptune and on the Earth is correct? A There is more …
- Question 32
Which row shows the general formula for alkenes and for alcohols? alkenes alcohols A CnH2n CnH2n+1COOH B CnH2n CnH2n+1OH C CnH2n+2 CnH2n+1COOH D CnH2n+2 CnH2n+1OH
- Question 33
A molecule has the formula C2H5Cl. What is its chemical name? A chloroethane B chloroethanol C chloroethene D chloromethanol
- Question 34
Which compound rapidly decolourises aqueous bromine? A ethane B ethanoic acid C ethanol D ethene
- Question 35
Compound Z has the molecular formula C2H6O. Which statement about compound Z is correct? A Z is unsaturated. B Z is a carboxylic acid. C Z is formed by the reaction of ethane with steam. D Z is used as …
- Question 36
What is the formula of the salt formed when aqueous ethanoic acid reacts with calcium carbonate? A Ca(CH3COOH)2 B Ca(CH3COO)2 C Ca2CH3COOH D Ca2CH3COO
- Question 37
Rock salt is a mixture of salt and sand. The method used to separate the sand from the salt is listed. step 1 Crush the rock salt, add to warm water and stir. step 2 Pour the mixture through a …
- Question 38
Chromatography is carried out on mixture Y and dyes …
- Question 39
A fractionating column is used to separate the hydrocarbon fractions in petroleum by fractional distillation. Which row describes the properties of the fractions that condense at the top of the fractionating column? size of molecule boiling point A large high …
- Question 40
When acid is added to salt X, a gas is produced which turns limewater milky. When sodium hydroxide is added to salt X, a gas is produced which turns litmus paper blue. What is X? A CaCO3 B (NH4)2CO3 C …
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