Cambridge O Level · 5070 · Paper 1 · Multiple choice
Chemistry 5070/12 May/June 2016 past paper
Cambridge O Level Chemistry (5070) Paper 1 (Multiple choice), variant 2, May/June 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
- 30
File names: 5070_s16_qp_12 · 5070_s16_ms_12
Grade thresholds for 5070/12 May/June 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 |
|---|---|---|---|---|
| 30 | 24 | 19 | 16 | 14 |
Topics in this paper
Which syllabus chapters 5070/12 May/June 2016 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 5070/12 May/June 2016
- Question 1
Which row correctly identifies the gas? gas test observation A Cl 2 damp litmus paper the litmus paper turns blue B NH3 damp litmus paper the litmus paper turns red C O2 limewater no change is observed D SO2 acidified …
- Question 2
A student plans two experiments. experiment 1 find the concentration of a solution of sodium hydroxide by titration with dilute hydrochloric acid experiment 2 find the rate of the reaction between pieces of calcium carbonate and dilute hydrochloric acid by …
- Question 3
Q is a pure sample of a substance that has a single Rf value of 0.9. In the chromatogram shown, which letter represents …
- Question 4
Which statement about the isotopes of bromine is correct? They are atoms with the same number of A electrons and a different number of protons. B neutrons and the same number of electrons. C protons and the same chemical properties. …
- Question 5
Compound Z is made from element X and element Y. Compound Z is a good conductor of electricity when molten but not when solid. Which statement is correct? A Compound Z has strong forces of attraction between electrons and positive …
- Question 6
Copper wire is used to complete an electrical circuit. copper wire lamp What happens in the copper wire? A Electrons move along the wire to the negative terminal. Positive ions stay in position. B Electrons move along the wire to …
- Question 7
Which statement shows that graphite and diamond are different forms of the element carbon? A Both graphite and diamond have giant molecular structures. B Complete combustion of equal masses of graphite and diamond produces equal masses of carbon dioxide and …
- Question 8
Ethene, C2H4, is a covalent compound with a simple molecular structure. Which statement about ethene is correct? A Ethene is a liquid at room temperature and pressure. B Liquid ethene conducts electricity. C One ethene molecule contains sixteen protons. D …
- Question 9
An organic compound has the molecular formula C8H16O4. What is the empirical formula of the compound? …
- Question 10
Compound P is the only substance formed when two volumes of ammonia gas react with one volume of carbon dioxide gas (both volumes being measured at r.t.p.). What is the formula of P? A NH2CO2NH4 B (NH2)2CO C NH4CO2NH4 D …
- Question 11
Gases can diffuse through porous pots. The diagram shows a beaker full of nitrogen inverted over a porous pot containing carbon monoxide. beaker carbon monoxide porous pot nitrogen water The water level does not move. Which statement explains this? A …
- Question 12
Copper is purified by electrolysis. Which statement is not correct? A Both electrodes contain copper. B Copper is both oxidised and reduced in the process. C Pure copper is deposited on the positive electrode. D The electrolyte is aqueous copper(II) …
- Question 13
Concentrated aqueous sodium chloride is electrolysed using inert electrodes until no more chlorine gas is evolved. What could be the pH of the resulting solution? …
- Question 14
Ammonia can be produced industrially from nitrogen and hydrogen. …
- Question 15
The diagram shows an energy profile diagram for a chemical reaction, both with and without a catalyst. Which energy change is the activation energy for the catalysed reaction? products reactants …
- Question 16
Oil floats on water. Which statement is not true of oil and water? A Oil and water are immiscible. B Oil is less dense than water. C Some molecules in oil have a higher relative molecular mass than water. D …
- Question 17
Which process does not involve the use of a catalyst? A the extraction of iron from haematite in a blast furnace B the manufacture of sulfur trioxide C the production of ammonia from nitrogen and hydrogen D the redox reactions …
- Question 18
Which statement does not describe a reduction reaction? A Electrons are gained during the reaction. B Hydrogen is gained during the reaction. C It takes place at the negative electrode during electrolysis. D Oxygen is gained during the reaction.
- Question 19
The pH of an aqueous solution of hydrochloric acid is 2. What will be the pH of the acid after the addition of 10 g of sodium chloride? …
- Question 20
One mole samples of each of the solid carbonates of lead, calcium, barium and magnesium are reacted in turn with excess dilute sulfuric acid. excess dilute sulfuric acid solid carbonate Which sample of carbonate will release the greatest volume of …
- Question 21
In which reaction are two of the products salts? A aqueous lead(II) nitrate and aqueous copper(II) sulfate B aqueous sodium hydroxide and solid ammonium sulfate C dilute hydrochloric acid and aqueous sodium carbonate D dilute hydrochloric acid and magnesium
- Question 22
The diagram shows the structure of brass. zinc atom copper atom Why is brass harder than pure copper? A The zinc atoms form strong covalent bonds with the copper atoms. B The zinc atoms prevent layers of copper atoms from …
- Question 23
From their position in the Periodic Table, which statement is correct? A Atoms of elements in Group VII react to form ions by losing one electron. B Iodine can displace bromine from its salts. C Potassium reacts more rapidly than …
- Question 24
The table gives the melting points, densities and electrical conductivities of four elements. Which element is copper? melting point in °C density in g / cm3 electrical conductivity …
- Question 25
An atom of an element has eight electrons only. Which statement about this element is correct? A It forms an ion with two negative charges. B It has a full outer shell of electrons. C It is a metal. D …
- Question 26
The diagram shows a flow chart for the manufacture of fertiliser. cracking of hydrocarbons fractional distillation of air gas X gas W pressure Y and 450 °C product Z fertiliser In the flow chart, what are …
- Question 27
Which oxide can be reduced to the metal by roasting with powdered iron? A calcium oxide B copper(II) oxide C magnesium oxide D zinc oxide
- Question 28
Which element, if attached to iron immersed in salt water, would prevent the iron from corroding? A carbon B copper C magnesium D sulfur
- Question 29
The final reaction in the extraction of metal X is represented by the following equation. X2O3 + 3CO …
- Question 30
Hydrated sodium carbonate decomposes when heated in a Bunsen burner flame. Which equation shows this decomposition correctly? A 2Na2CO3.10H2O(s) → 4Na(s) + 2CO2(g) …
- Question 31
Aluminium is extracted from aluminium oxide by electrolysis. waste gases carbon cathode (-ve) carbon anodes (+ve) purified aluminium oxide dissolved in molten cryolite molten aluminium Which statement about this electrolysis is correct? A Aluminium ions gain electrons to form aluminium. …
- Question 32
Which ion is present in both sewage and fertilisers and can cause eutrophication when it enters rivers? A carbonate B chloride C nitrate D sulfate
- Question 33
The diagram shows an experiment to determine the percentage of oxygen in air. lit candle bell jar water Which diagram shows the correct level of water after the candle stops burning? …
- Question 34
How many of the structures show an unsaturated hydrocarbon molecule? …
- Question 35
Which statements are correct for alkenes but not for alkanes? 1 They turn aqueous bromine from brown to colourless. 2 Their general formula is CnH2n. 3 They burn in air to form carbon dioxide and water. …
- Question 36
Wine is an alcoholic drink that contains ethanol. If wine is left exposed to the air for too long, it can become acidic. This is because the ethanol is 1 to the acid 2 . Which word and formula correctly …
- Question 37
Polymer Z has the structure shown. …
- Question 38
The diagram shows the structure of poly(dichloroethene). …
- Question 39
How can the following reaction be described? …
- Question 40
The structures of four hydrocarbons, …
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