Cambridge IGCSE · 0620 · Paper 2 · Multiple choice (Extended)
Chemistry 0620/21 May/June 2019 past paper
Cambridge IGCSE Chemistry (0620) Paper 2 (Multiple choice (Extended)), variant 1, 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
- 30
File names: 0620_s19_qp_21 · 0620_s19_ms_21
Grade thresholds for 0620/21 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 |
|---|---|---|---|---|---|---|
| 30 | 25 | 21 | 18 | 15 | 13 | 11 |
Topics in this paper
Which syllabus chapters 0620/21 May/June 2019 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/21 May/June 2019
- Question 1
Which statement explains why ammonia gas, NH3, diffuses at a faster rate than hydrogen chloride gas, HCl ? A Ammonia expands to occupy all of the space available. B Ammonia has a smaller relative molecular mass than hydrogen chloride. C …
- Question 2
2.00 g of powdered calcium carbonate is added to 50.0 cm3 of hydrochloric acid. Which apparatus is used to measure the calcium carbonate and the hydrochloric acid? calcium carbonate hydrochloric acid A balance burette B balance thermometer C pipette burette …
- Question 3
The measurements from a chromatography experiment using substance F are shown. The diagram is not drawn to scale. 100 mm 55 mm 90 mm 15 mm solvent front baseline distance moved by F What is the Rf value of …
- Question 4
Which statement about an atom of fluorine, …
- 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
Propane burns in oxygen. C3H8 + xO2 → 3CO2 + yH2O Which values of x and y balance the equation? …
- Question 8
A tablet contains 0.080 g of ascorbic acid (Mr = 176). What is the concentration of ascorbic acid when one tablet is dissolved in 200 cm3 of water? …
- Question 9
Which statement about the electrolysis of copper(II) sulfate solution using carbon electrodes is correct? A A colourless gas is produced at the anode. B A colourless gas is produced at the cathode. C The colour of the electrolyte remains the …
- Question 10
Aluminium metal is extracted from aluminium oxide by electrolysis. Which ionic half-equation describes a reaction that occurs at the named electrode? ionic half-equation electrode …
- Question 11
Which statement about the hydrogen fuel cell is not correct? A Chemical energy is converted into electrical energy. B Hydrogen is oxidised. C The reaction that takes place is endothermic. D Water is the only product.
- Question 12
Nitrogen reacts with hydrogen to produce ammonia. …
- 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
The graph shows how the yield of product in a reversible reaction changes as the temperature and pressure are changed. All reactants and products are gases. reactants products yield of product pressure …
- Question 16
Which changes represent oxidation? …
- Question 17
Nitrogen(I) oxide, N2O, nitrogen(II) oxide, NO, and carbon monoxide, CO, are all non-metal oxides. They do not react with acids or bases. Which statement is correct? A They are acidic oxides. B They are amphoteric oxides. C They are basic …
- Question 18
- Question 19
Ethanoic acid is a weak acid. Hydrochloric acid is a strong acid. Which statements are correct? 1 Ethanoic acid molecules are partially dissociated into ions. 2 1.0 mol / dm3 ethanoic acid has a higher pH than 1.0 mol / …
- Question 20
The properties of an element are shown. electrical conductivity density reaction with water high low reacts violently with cold water Which element has these properties? …
- Question 21
Which statement about elements in Group I and Group VII of the Periodic Table is correct? A Bromine reacts with potassium chloride to produce chlorine. B Iodine is a monatomic non-metal. C Lithium has a higher melting point than potassium. …
- Question 22
Which statement about elements in Group VIII of the Periodic Table is correct? A They all have a full outer shell of electrons. B They all react with Group I elements to form ionic compounds. C They are all diatomic …
- 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
Three metal compounds, P, Q and R, are heated using a Bunsen burner. The results are shown. P colourless gas produced, which relights a glowing splint Q colourless gas produced, which turns limewater milky R no reaction Which row shows …
- 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
Why is aluminium used to make containers for storing food? A It conducts electricity. B It has a high melting point. C It is resistant to corrosion. D It is strong.
- 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
Oxides of nitrogen are formed in car engines and are a source of air pollution. To decrease this pollution, catalytic converters are fitted to car exhausts. What happens to the oxides of nitrogen in the catalytic converter? A combustion B …
- 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
Ammonia is manufactured by the Haber Process. …
- Question 32
The carbon cycle is shown. atmospheric carbon dioxide dead organic matter green plants animals Y death and excretion X Z decomposition respiration Which row describes processes X, Y and …
- 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
Why is ethanol a member of the homologous series of alcohols but propane is not? A Ethanol has two carbon atoms per molecule but propane has three. B Ethanol can be made from ethene but propane is obtained from petroleum. …
- Question 37
Chlorine reacts with methane. Which statements are correct? 1 The reaction takes place in the dark. 2 The reaction of chlorine with methane forms chloromethane. 3 Chloromethane reacts with chlorine to produce dichloromethane. 4 The reaction of chlorine with methane …
- Question 38
Which statements about aqueous ethanoic acid are correct? 1 Ethanoic acid contains the functional group –COOH. 2 Ethanoic acid reacts with carbonates to produce hydrogen. 3 Ethanoic acid turns Universal Indicator paper blue. 4 Ethanoic acid has a pH lower …
- Question 39
The structure of an ester is shown. C OCH2CH2CH3 O CH3 What is the name of the ester? A ethyl propanoate B methyl propanoate C propyl ethanoate D propyl methanoate
- Question 40
The structure of a polymer is shown. …
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