Cambridge IGCSE · 0620 · Paper 2 · Multiple choice (Extended)
Chemistry 0620/21 Oct/Nov 2017 past paper
Cambridge IGCSE Chemistry (0620) Paper 2 (Multiple choice (Extended)), variant 1, Oct/Nov 2017: 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
- 29
File names: 0620_w17_qp_21 · 0620_w17_ms_21
Grade thresholds for 0620/21 Oct/Nov 2017
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 |
|---|---|---|---|---|---|---|
| 29 | 25 | 22 | 18 | 15 | 12 | 9 |
Topics in this paper
Which syllabus chapters 0620/21 Oct/Nov 2017 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 0620/21 Oct/Nov 2017
- Question 1
Which process causes the greatest increase in the distance between particles? A condensation B freezing C melting D sublimation
- Question 2
A student put 25.0 cm3 of dilute hydrochloric acid into a conical flask. The student added 2.5 g of solid sodium carbonate and measured the change in temperature of the mixture. Which apparatus does the student need to use to …
- Question 3
The results obtained from a chromatogram are shown. distance travelled / cm solvent 5.0 substance X 3.0 substance Y 2.5 Which row gives the Rf values of substance X and substance Y? Rf (X) Rf …
- Question 4
Two statements about silicon(IV) oxide are given. 1 It is a hard substance. 2 It has a macromolecular structure with strong covalent bonds. Which is correct? A Both statements are correct and statement 2 explains statement 1. B Both statements …
- Question 5
Which statement explains why isotopes of the same element have the same chemical properties? A They have a different number of neutrons in the nucleus. B They have the same number of neutrons in the nucleus. C They have the …
- Question 6
Which dot-and-cross diagram shows the outer shell electron arrangement in a molecule of nitrogen? …
- Question 7
The equation for the reaction between barium chloride solution and dilute sulfuric acid is shown. BaCl 2 + H2SO4 → BaSO4 + 2HCl Which row shows the state symbols for this equation? BaCl 2 H2SO4 BaSO4 2HCl A (aq) (aq) …
- Question 8
A compound is analysed and found to contain 85.7% carbon and 14.3% hydrogen. What is its empirical formula? A CH B CH2 …
- Question 9
Which statements about the electrolysis of concentrated copper(II) chloride are correct? 1 Electrons are transferred from the cathode to the copper(II) ions. 2 Electrons move round the external circuit from the cathode to the anode. 3 Chloride ions are attracted …
- Question 10
Which metal combination produces the highest voltage reading in the cells shown? V A Fe Cu V B Zn Cu V C Cu Cu V D Mg Cu
- Question 11
The compound hydrazine is used as a rocket fuel. It has the structural formula shown. …
- Question 12
Which statement describes an exothermic reaction? A The energy absorbed for bond breaking is greater than the energy released by bond formation. B The energy absorbed for bond breaking is less than the energy released by bond formation. C The …
- Question 13
The mass of a beaker and its contents is plotted against time. Which graph represents what happens when sodium carbonate reacts with an excess of dilute hydrochloric acid in an open beaker? mass time A mass time B mass time …
- Question 14
Copper(II) oxide reacts with hydrogen. CuO …
- Question 15
Ethanoic acid reacts slowly with calcium carbonate. Which statements explain why an increase in temperature increases the rate of the reaction? 1 The activation energy of the reaction is decreased. 2 There is an increase in collision rate. 3 The …
- Question 16
Methane reacts with steam to produce hydrogen and carbon monoxide. The equation for the reaction is shown. CH4(g) …
- Question 17
Some properties of four oxides are listed. Oxide 1 reacts with both acids and alkalis to form salts. Oxide 2 reacts with acids to form salts but does not react with alkalis. Oxide 3 reacts with alkalis to form salts …
- Question 18
What is not a typical characteristic of acids? A They react with alkalis producing water. B They react with all metals producing hydrogen. C They react with carbonates producing carbon dioxide. D They turn blue litmus paper red.
- Question 19
Zinc sulfate is made by reacting an excess of zinc oxide with dilute sulfuric acid. The excess zinc oxide is then removed from the solution. Which process is used to obtain solid zinc sulfate from the solution? A crystallisation B …
- Question 20
What is used to test for chlorine? A a glowing splint B damp litmus paper C limewater D potassium manganate(VII) solution
- Question 21
Which statements about the trends across a period of the Periodic Table are correct? 1 Aluminium is more metallic than sodium. 2 Beryllium is more metallic than carbon. 3 Boron is more metallic than lithium. 4 Magnesium is more metallic …
- Question 22
Astatine is an element in Group VII of the Periodic Table. Astatine is 1 reactive than iodine. The melting point of astatine is 2 than the melting point of iodine. Astatine is 3 in colour than bromine. Which words complete …
- Question 23
Which row describes the properties of a typical transition element? melting point forms coloured compounds can act as a catalyst A high no no B high yes yes C low no yes D low yes no
- Question 24
Why is argon gas used to fill electric lamps? A It conducts electricity. B It glows when heated. C It is less dense than air. D It is not reactive.
- Question 25
What is a property of all metals? A conduct electricity B hard C low melting points D react with water
- Question 26
Aluminium is extracted by the electrolysis of aluminium oxide. Which statement is not correct? A Aluminium ions are oxidised at the cathode. B Carbon dioxide is made at the anode. C Cryolite is added to lower the melting point of …
- Question 27
Which row describes how the metals are used? mixed with zinc to form brass used to galvanise iron A aluminium tin B aluminium zinc C copper tin D copper zinc
- Question 28
Information about the nitrates and carbonates of two metals, Q and R, is shown. appearance solubility in water effect of heat nitrate of Q white solid soluble colourless gas evolved which relights a glowing splint carbonate of Q white solid …
- Question 29
The flow chart shows stages in the treatment of river water to produce drinking water. drinking water stage Y stage X settling tank river water What occurs at stages X and …
- Question 30
Four iron nails had different metals wrapped around them. The nails were placed in an open dish filled with water and left for a week. Which iron nail has no protection against rusting? A wrapped in aluminium B wrapped in …
- Question 31
Ammonia is made by the Haber process. …
- Question 32
Which process does not produce carbon dioxide? A combustion of alkanes B photosynthesis C respiration D thermal decomposition of limestone
- Question 33
Which row shows the conditions used in the manufacture of sulfuric acid by the Contact process? temperature / °C pressure / atm catalyst …
- Question 34
Some marble chips (calcium carbonate) are heated strongly and substances X and Y are formed. Substance X is a white solid that reacts with water, giving out heat. Substance Y is a colourless gas. What are substances X and …
- Question 35
The structures of some organic molecules are shown. C C CH3 …
- Question 36
Some of the fractions obtained from the fractional distillation of petroleum are used as fuels for vehicles. Which two fractions are used as fuels for vehicles? A bitumen fraction and gasoline fraction B bitumen fraction and naphtha fraction C gasoline …
- Question 37
X, Y and Z are three hydrocarbons. X CH2=CH2 Y CH3–CH=CH2 Z CH3–CH2–CH=CH2 What do compounds X, Y and Z have in common? 1 They are all alkenes. 2 They are all part of the same homologous series. 3 They …
- Question 38
The diagram shows a reaction sequence. butane ethene ethanol carbon dioxide and water …
- Question 39
Which pair of compounds can be used to prepare CH3CH2COOCH2CH3? A ethanoic acid and ethanol B ethanoic acid and propanol C propanoic acid and ethanol D propanoic acid and propanol
- Question 40
The structure of a synthetic polymer is shown. …
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