Cambridge IGCSE · 0620 · Paper 2 · Multiple choice (Extended)
Chemistry 0620/23 May/June 2019 past paper
Cambridge IGCSE Chemistry (0620) Paper 2 (Multiple choice (Extended)), variant 3, May/June 2019: 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
- 27
File names: 0620_s19_qp_23 · 0620_s19_ms_23
Grade thresholds for 0620/23 May/June 2019
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 |
|---|---|---|---|---|---|---|
| 27 | 23 | 19 | 18 | 15 | 13 | 11 |
Topics in this paper
Which syllabus chapters 0620/23 May/June 2019 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/23 May/June 2019
- Question 1
Hydrogen chloride gas (Mr = 36.5) is released at P in the apparatus shown. The Universal Indicator paper turns red after …
- Question 2
Which piece of apparatus is used to measure 24.8 cm3 of gas produced during a reaction? A beaker B conical flask C measuring cylinder D pipette
- Question 3
Rf values are used to identify unknown substances using paper chromatography. Which statements about Rf values are correct? 1 Rf values are always less than 1.0. 2 Rf value = distance travelled by solvent ÷ distance travelled by unknown substance. …
- Question 4
The structure of an atom is shown. 7p 8n key = electron = neutron n = proton p Which element is the atom an isotope of? A nitrogen B oxygen C phosphorus D titanium
- Question 5
Which row describes the formation of single covalent bonds in methane? A atoms share a pair of electrons both atoms gain a noble gas electronic structure B atoms share a pair of electrons both atoms have the same number of …
- Question 6
Which statement describes the structure of an ionic compound? A It is a giant lattice of oppositely charged ions. B It is a giant lattice of positive ions in a ‘sea’ of electrons. C It is a giant molecule of …
- Question 7
When propane burns in air, carbon dioxide and water are formed. What is the chemical equation for this reaction? …
- Question 8
What is the concentration of a solution that contains 25.0 g NaOH in 500 cm3 of water? A 0.125 mol / dm3 B 0.800 mol / dm3 C 1.25 mol / dm3 D 3.20 mol / dm3
- Question 9
An aqueous solution of copper(II) sulfate was electrolysed using copper electrodes. copper anode copper cathode aqueous copper(II) sulfate power supply + – Which equation for the reaction at the anode is correct? A Cu → Cu2+ …
- Question 10
In the manufacture of aluminium by electrolysis, aluminium oxide is dissolved in molten cryolite. Why is cryolite used? A It lowers the melting point of the aluminium. B It makes the aluminium a better conductor. C It removes impurities from …
- Question 11
Which statement about a fuel cell in a car is correct? A The fuel cell produces heat, which powers the car. B The fuel cell is supplied with hydrogen directly from the air. C The only emission from a fuel …
- Question 12
Methane burns in oxygen to form carbon dioxide and water. CH4(g) …
- Question 13
Which change in reaction conditions increases both the collision rate and the proportion of molecules with sufficient energy to react? A addition of a catalyst B increasing the concentration of a reactant C increasing the surface area of a reactant …
- Question 14
When blue-green crystals of nickel(II) sulfate are heated, water is produced and a yellow solid remains. When water is added to the yellow solid, the blue-green colour returns. Which process describes these changes? A combustion B corrosion C neutralisation D …
- Question 15
A reaction between nitrogen and oxygen is shown. The forward reaction is endothermic. …
- Question 16
Which changes represent reduction? 1 Cl …
- Question 17
Which statement about carbon monoxide and aluminium oxide is correct? A Carbon monoxide and aluminium oxide are both amphoteric. B Carbon monoxide and aluminium oxide are both neutral. C Carbon monoxide is amphoteric but aluminium oxide is neutral. D Carbon …
- Question 18
- Question 19
Solutions of acid R and acid S have the same concentration. The same volume of each acid at the same temperature is reacted with the same mass of magnesium ribbon. The volume of hydrogen produced is measured. The results are …
- Question 20
Part of the Periodic Table is shown. …
- Question 21
Which statement about the properties of elements in Group I and in Group VII is correct? A Bromine displaces iodine from an aqueous solution of potassium iodide. B Chlorine, bromine and iodine are diatomic gases at room temperature. C Lithium, …
- Question 22
Gas G has 10 electrons. Gas H has eight more electrons than gas G. Both gases are monoatomic. Which statement about G and H is correct? A Both gases are in the same group of the Periodic Table. B Both …
- Question 23
The diagrams show the structure of two substances used to make electrical conductors. X Y Which statement correctly describes X and …
- Question 24
Magnesium nitrate, magnesium hydroxide and magnesium carbonate all decompose when heated. Which statement about these decomposition reactions is correct? A Magnesium carbonate decomposes to release carbon dioxide and oxygen. B Magnesium hydroxide decomposes to release hydrogen and oxygen. C Magnesium …
- Question 25
Zinc is extracted from its ore, zinc blende, using two chemical reactions. 1 2ZnS …
- Question 26
Four metals, zinc, M, copper and magnesium, are reacted with aqueous solutions of their nitrates. The results are shown. metal magnesium nitrate M nitrate copper nitrate zinc nitrate magnesium …
- Question 27
Aluminium is used to make containers for storing food. Which property makes it suitable for this use? A conducts heat B low density C resists corrosion D shiny surface
- Question 28
Water can be treated by filtration then chlorination. Which uses do not need water of this quality? 1 water for cooling in industry 2 water for washing clothes 3 water for drinking …
- Question 29
Catalytic converters in car exhausts change polluting gases into non-polluting gases. Which statements about oxides of nitrogen and car engines are correct? 1 The nitrogen in oxides of nitrogen comes from compounds in petrol. 2 The oxygen in oxides of …
- Question 30
The diagram shows an experiment to investigate how paint affects the rusting of iron. air P Q water iron painted iron What happens to the water level in tubes P and Q? tube P tube Q A falls rises B …
- Question 31
Which row about the carbon cycle is correct? process for removing carbon dioxide from the atmosphere process for returning carbon dioxide to the atmosphere A photosynthesis combustion of hydrocarbons B photosynthesis cracking of hydrocarbons C respiration combustion of hydrocarbons D …
- Question 32
Ammonia is manufactured in an exothermic reaction. …
- Question 33
Which row shows the conditions used in the Contact process? temperature / °C pressure / atm catalyst …
- Question 34
The diagram represents a lime kiln used to heat limestone to a very high temperature. air in fuel in fuel in air in X waste gases limestone lime kiln What leaves the kiln at X? A calcium carbonate B calcium …
- Question 35
Which fuel could be gasoline? Is it obtained from petroleum? Is it used as fuel for cars? Is it used as fuel for cars? no yes no yes …
- Question 36
Which statements about homologous series are correct? 1 All members have similar chemical properties. 2 All members have the same molecular mass. 3 Ethane and ethene are members of the same homologous series. 4 Ethane and propane are members of …
- Question 37
Which type of reaction takes place when methane reacts with chlorine in the presence of ultraviolet light? A addition B cracking C polymerisation D substitution
- Question 38
Which statement about aqueous ethanoic acid is correct? A It reacts with metal carbonates to form salts, hydrogen and water. B It reacts with metal oxides to form salts and oxygen. C It reacts with reactive metals to form salts …
- Question 39
The structure of ester W is shown. …
- Question 40
A section of a polymer is shown. …
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