Home > Chemistry O LevelVariant 1 May/June 2016 Report a question What’s wrong with this question? You cannot submit an empty report. Please add some details. 0% Variant 1 May/June 2016 1. The paper chromatogram below was obtained from four different dyes. Which dye has an Rf value of 0.7? A C B D 2. Steam reacts with carbon in an endothermic reaction. Which conditions of temperature and pressure would give the largest yield of hydrogen? B C D A 3. Which of the compounds shown are in the same homologous series? 1, 2 and 4 2, 3 and 4 1, 3 and 4 1, 2 and 3 4. Two statements about argon are given. Argon has a full outer shell of electrons. Argon is very reactive and is used in lamps. Which is correct? Both statements are correct but statement 2 does not explain statement 1. Both statements are correct and statement 2 explains statement 1. Statement 1 is correct but statement 2 is incorrect. Statement 2 is correct but statement 1 is incorrect. 5. A liquid X reacts with solid Y to form a gas. Which two diagrams show suitable methods for investigating the rate (speed) of the reaction? 1 and 3 2 and 4 1 and 4 2 and 3 6. Many car exhaust systems contain a catalytic converter. Which change does not occur in a catalytic converter? carbon monoxide โ carbon dioxide carbon dioxide โ carbon nitrogen oxides โ nitrogen unburnt hydrocarbons โ carbon dioxide and water 7. A sample of a dye is investigated by chromatography. A line is drawn across a piece of chromatography paper and a spot of the dye is placed on it. The paper is placed in water. Which row is correct? C D A B 8. The equation for an exothermic reaction in the Contact process is shown. 2SO2(g) + O2(g) โ 2SO3(g) Which effects do increasing the temperature and using a catalyst have on the rate of formation of sulfur trioxide, SO3? A D C B 9. Which formula represents a polyester? A D C B 10. A new planet has been discovered and its atmosphere has been analysed. The table shows the composition of its atmosphere. Which gases are present in the atmosphere of the planet in a higher percentage than they are in the Earthโs atmosphere? carbon dioxide and oxygen nitrogen only nitrogen and oxygen carbon dioxide only 11. The diagram shows the separation of petroleum into fractions. What could X, Y and Z represent? B D C A 12. Which statement about the uses of metals is correct? Aluminium is used in the manufacture of aircraft because of its strength and high density. Stainless steel is used in the construction of chemical plant because of its strength and resistance to corrosion. Mild steel is used in the manufacture of car bodies because of its strength and resistance to corrosion. Copper is used in electrical wiring because of its strength and high density. 13. Which statements about isotopes of the same element are correct? They are atoms which have the same chemical properties because they have the same number of electrons in their outer shell. They are atoms which have the same number of electrons and neutrons but different numbers of protons. They are atoms which have the same number of electrons and protons but different numbers of neutrons. 3 only 2 only 1 and 3 1 and 2 14. The diagram shows an experiment to investigate how paint affects the rusting of iron. What happens to the water level in tubes P and Q? D B C A 15. The diagram shows some properties that substances may have. To which labelled part of the diagram does 235U belong? B D A C 16. Hydrogen burns exothermically in oxygen. The equation for the reaction is: 2H2 + O2 โ 2H2O The table shows the bond energies involved. What is the energy given out during the reaction? โ442 kJ/mol โ884 kJ/mol โ486 kJ/mol โ3226 kJ/mol 17. A compound, X, contains 40.0% carbon, 6.7% hydrogen and 53.3% oxygen by mass. The relative molecular mass, Mr, of X is 60. What is the molecular formula of X? CH2O C2H4O2 C2H4O CH4O 18. Which of the following could be a transition element? B A D C 19. Which statement describes the attractive forces between molecules (intermolecular forces)? They are strong covalent bonds which hold molecules together. They are weak forces formed between covalently-bonded molecules. They are strong ionic bonds which hold molecules together. They are weak forces which hold ions together in a lattice. 20. The diagram shows a simple cell. Which statement about the process occurring when the cell is in operation is correct? Electrons travel through the solution. The zinc electrode increases in mass. The reaction Zn โ Zn2+ + 2eโ occurs. Cu2+ ions are formed in solution. 21. The structure of a monomer is shown. Which polymer can be made from this monomer? B C A D 22. Aluminium is manufactured by electrolysis of aluminium oxide. The diagram shows the electrolysis cell. Which statement about the process is not correct? Aluminium ions gain electrons during the electrolysis and are reduced. The anode and cathode are made of graphite. Cryolite is added to reduce the melting point of the aluminium oxide. The cathode has to be replaced regularly because it is burnt away. 23. Which compounds contain the same number of carbon, hydrogen and oxygen atoms? W and X W and Y Y and Z X and Z 24. Which statements explain why increasing temperature increases the rate of a chemical reaction? Heat makes the molecules move faster and collide more often. Heat makes the molecules collide with more energy so they are more likely to react. Increasing temperature lowers the activation energy for the reaction. 2 only 1 and 2 1 and 3 1 only 25. Three students, X, Y and Z, were told that solid P reacts with dilute acids and also conducts electricity. The table shows the studentsโ suggestions about the identity of P. Which of the students are correct? X only X, Y and Z Y only Z only 26. Which equation represents a reduction reaction? Fe3+ โ Fe2+ + e– Fe2+ โ Fe3+ + e– Fe2+ + e– โ Fe3+ Fe3+ + e–โ Fe2+ 27. Where in the Periodic Table is the metallic character of the elements greatest? A D B C 28. The rate of diffusion of two gases, methane, CH4, and ethene, C2H4, is measured using the apparatus shown. Which gas diffuses faster and why? C B D A 29. Ammonia is formed by a reversible reaction. The forward reaction is exothermic. Which changes in conditions would increase the yield of ammonia? C B A D 30. Which row describes whether an amphoteric oxide reacts with acids and bases? D A C B 31. 25cm3 of 0.1 mol/dm3 hydrochloric acid exactly neutralise 20cm3 of aqueous sodium hydroxide. The equation for this reaction is: NaOH + HCl โ NaCl + H2O What is the concentration of the sodium hydroxide solution? 0.800 mol/dm3 0.080 mol/dm3 1.25 mol/dm3 0.125 mol/dm3 32. Which reactions could take place at the anode during electrolysis? 1 and 4 2 and 4 3 and 4 1 and 2 33. A farmerโs soil is very low in both nitrogen (N) and phosphorus (P). Which fertiliser would improve the quality of this soil most effectively? C A D B 34. The diagram represents the general structure of a solid Z. What is Z? sulfur aluminium silicon dioxide iodine 35. Which substance reacts with dilute sulfuric acid to form a salt that can be removed from the resulting mixture by filtration? copper(II) carbonate aqueous sodium hydroxide copper aqueous barium chloride 36. What is an advantage of producing ethanol by fermentation of sugar compared to the catalytic addition of steam to ethene? The process uses renewable raw materials. The process uses high temperature. The alcohol produced is purer. The process is faster. 37. The table shows the electronic structure of four atoms. Which two atoms combine to form a covalent compound? X and Z W and Y X and Y W and X 38. Some properties of four elements, P, Q, R and S, are shown in the table. Two of these elements are in Group I of the Periodic Table and two are in Group VII. Which statement is correct? Q is above R in Group I. Q is below S in Group VII. R is below S in Group VII. P is below R in Group I. 39. Which statements are properties of an acid? reacts with ammonium sulfate to form ammonia turns red litmus blue A D C B 40. A student investigated the reactions of four metals, R, S, T and U, with solutions of their salts. The results are given in the table. What is the order of reactivity of the metals, most reactive first? A D C B Your score is The average score is 0% 0% Restart quiz
