Cambridge O Level · 5070 · Paper 1 · Multiple choice
Chemistry 5070/11 May/June 2019 past paper
Cambridge O Level Chemistry (5070) Paper 1 (Multiple choice), 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
- 29
File names: 5070_s19_qp_11 · 5070_s19_ms_11
Grade thresholds for 5070/11 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 |
|---|---|---|---|---|
| 29 | 23 | 18 | 15 | 13 |
Topics in this paper
Which syllabus chapters 5070/11 May/June 2019 tested, by marks. Each chapter links to every past-paper question on it.
Questions in 5070/11 May/June 2019
- Question 1
An experiment is done to measure the rate of reaction between calcium carbonate and dilute hydrochloric acid. The gas formed is collected in a gas syringe. Which additional pieces of apparatus are essential to measure how the rate of the …
- Question 2
After acidification with dilute nitric acid, a colourless solution of X reacts with aqueous silver nitrate to give a white precipitate. What could X be? A calcium iodide B copper(II) chloride C lead(II) iodide D sodium chloride
- Question 3
A paper chromatography experiment is carried out to separate and identify the mixture of amino acids produced from the hydrolysis of a protein. Which apparatus is needed? A chromatography paper, locating agent, marker pen, solvent B chromatography paper, locating agent, …
- Question 4
Which conditions will give the highest rate of diffusion of a gas? molecular mass of gas temperature A large high B large low C small high D small low
- Question 5
Cobalt is a transition element. A particle of cobalt contains 24 electrons and has a nucleon number of 60. Which statement about this particle is correct? A It is a 3+ ion. B It is a 3– ion. C It …
- Question 6
Diamond and graphite are two different forms of the element carbon. They each have different uses. Which row is correct? use to cut glass as an electrode as a lubricant A diamond diamond graphite B diamond graphite graphite C graphite …
- Question 7
Which diagram shows the outer electron arrangement in calcium fluoride? F F Ca F– Ca2+ an electron from calcium an electron from fluorine key …
- Question 8
What is the number of shared pairs of electrons in an ammonia molecule? …
- Question 9
Two statements about metals are given. 1 Metals contain a lattice of negative ions in a ‘sea of electrons’. 2 The electrical conductivity of metals is related to the mobility of the electrons in the structure. Which is correct? A …
- Question 10
Powdered calcium carbonate reacts with dilute hydrochloric acid to produce calcium chloride, water and carbon dioxide. What is the correct ionic equation, including state symbols, for this reaction? A CaCO3(s) + 2HCl (aq) → CaCl 2(aq) …
- Question 11
In a volumetric experiment, 25.0 cm3 of 0.100 mol / dm3 sodium hydroxide reacts exactly with 20.0 cm3 of sulfuric acid. 2NaOH + H2SO4 → Na2SO4 + 2H2O What is the concentration of the sulfuric acid? A 0.0625 mol / …
- Question 12
The reaction for the conversion of bromoethane to ethanol is shown. C2H5Br + NaOH → C2H5OH + NaBr In an experiment, 10.90 g of bromoethane is converted into 3.45 g of ethanol. What is the percentage yield of ethanol? [Mr: …
- Question 13
One mole of a sugar, (CH2O)6, is burned. Which volume of oxygen, measured at room temperature and pressure, is required for complete combustion of the sugar? A 24 dm3 B 36 dm3 C 144 dm3 D 216 dm3
- Question 14
Which statement about the purification of copper by electrolysis is correct? A A pure copper anode is used. B A pure copper cathode is used. C The colour of the electrolyte fades throughout the process. D The electrolyte used is …
- Question 15
Which negative ions are present in aqueous copper(II) sulfate? A copper(II) ions and hydrogen ions B copper(II) ions only C sulfate ions and hydroxide ions D sulfate ions only
- Question 16
The diagram shows the energy profile for a reaction. products reactants energy progress of reaction …
- Question 17
The table shows the energy released by the complete combustion of some compounds. compound formula Mr ∆H in kJ / mol benzene …
- Question 18
Three experiments are carried out in which the same mass of magnesium is reacted with the same volume of dilute sulfuric acid at room temperature. The magnesium is in excess. experiment 1 Large pieces of magnesium are used. experiment 2 …
- Question 19
The equations show four reversible reactions. For which reaction would the equilibrium move to the right for both an increase in pressure and an increase in temperature? reaction enthalpy change …
- Question 20
Gas X turns acidified potassium manganate(VII) from purple to colourless. Gas Y turns aqueous potassium iodide from colourless to brown. What do these observations show about gas X and gas Y? gas X gas Y A oxidising agent oxidising agent …
- Question 21
Why is ethanoic acid described as a weak acid? A It is an organic acid. B It is a poor conductor of electricity. C It is only slightly dissociated in water. D It reacts only with very reactive metals.
- Question 22
What is the best method to prepare a pure sample of copper(II) sulfate? A Add copper to aqueous zinc sulfate. B Add copper to dilute sulfuric acid. C Add copper(II) carbonate to aqueous sodium sulfate. D Add copper(II) oxide to …
- Question 23
What is the percentage by mass of nitrogen in ammonium nitrate, NH4NO3? …
- Question 24
A student makes three suggestions about the Haber process and the Contact process. 1 Only one process uses a raw material obtained by fractional distillation of air. 2 Only one process involves the use of a catalyst. 3 The product …
- Question 25
Which uses for sulfuric acid are correct? 1 as a bleach in the manufacture of wood pulp for paper 2 as a food preservative in tinned foods 3 as a raw material in the manufacture of detergents 4 as a …
- Question 26
Element X forms: • a covalent compound, H2X • an ionic compound, Na2X • oxides XO2 and XO3. To which group of the Periodic Table does X belong? A II B III C IV D VI
- Question 27
Which property is common to 40Ca, 39K and 23Na? A Their atoms all have more neutrons than protons. B Their ions all have eight electrons in their outer shell. C They all sink when added to water. D They are …
- Question 28
Palladium is an element, atomic number 46. Some of its properties, and the properties of its compounds, can be predicted from its position in the Periodic Table. Which row is correct? predicted property of palladium predicted property of palladium compounds …
- Question 29
Three different elements react by losing electrons. The ions formed all have the electronic configuration 2,8. Which statement about these elements is correct? A They are in the same group. B They are in the same period. C They are …
- Question 30
A power cable requires an element that: 1 conducts electricity 2 has a relatively low density 3 is resistant to aerial oxidation. Which of these conditions does aluminium satisfy? …
- Question 31
Some atmospheric pollutants are listed. 1 sulfur dioxide 2 methane 3 nitrogen dioxide 4 unburned hydrocarbons Which substances could be removed by reacting with calcium carbonate? A 1 and …
- Question 32
River water contains many impurities. Which process alone can produce pure water from river water? A adding chlorine B distillation C filtering D passing through carbon
- Question 33
Compound Q is a hydrocarbon that has no isomers. Compound Q does not decolourise bromine in the dark. Which compound could be …
- Question 34
Which organic compound requires the least number of moles of oxygen for the complete combustion of one mole of the compound? A C3H7OH B C3H7COOH …
- Question 35
When a molecule of a saturated hydrocarbon is cracked, it forms two molecules X and Y. Which row is correct? …
- Question 36
The structures and names of three alcohols, P, Q and R are shown. The structures may not be named correctly. …
- Question 37
What is the empirical formula of ethanoic acid? A CH2O B CH4O …
- Question 38
What is the structure of propyl methanoate? A CH3COOCH2CH2CH3 B CH3COOCCH2CH3 C CH3CH2COOCH3 D CH3CH2CH2OOCH
- Question 39
Which substance, on combustion, produces oxides of nitrogen? A fat B protein C starch D Terylene
- Question 40
The monomer used to manufacture polystyrene is shown. …
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