14.5 Alkenes. Question Paper. Subject Chemistry (0620) Cambridge International Examinations (CIE) Organic Chemistry A* A B C D E U

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1 Save My Exams! The ome of Revision For more awesome GSE and level resources, visit us at lkenes Question Paper Level IGSE Subject hemistry (0620) Exam oard ambridge International Examinations (IE) Topic rganic hemistry Sub-Topic 14.5 lkenes ooklet Question Paper Time llowed: 30 minutes Score: /25 Percentage: /100 Grade oundaries: * E U >85% 75% 60% 45% 35% 25% <25%

2 Save My Exams! The ome of Revision For more awesome GSE and level resources, visit us at 1 ompound Q decolourises bromine water. ompound Q has two carbon atoms in each molecule. Which statement about compound Q is correct? It contains carbon-hydrogen double bonds. It has six hydrogen atoms per molecule. It has two carbon-carbon double bonds. It is produced by cracking alkanes. 2 hydrocarbon W burns to form carbon dioxide and water. W decolourises bromine water. What is the name of W and what is its structure? name of W structure of W ethane ethane ethene ethene

3 Save My Exams! The ome of Revision For more awesome GSE and level resources, visit us at 3 Which reaction is used as a test for alkenes? lkenes burn in air to give carbon dioxide and water. lkenes decolourise aqueous bromine. lkenes form polymers when heated in the presence of a catalyst. lkenes react with steam to form alcohols. 4 Liquid W burns completely to give carbon dioxide and water. Liquid W is a compound containing carbon, hydrogen and oxygen. solution of liquid W in water is p 7. What is liquid W? ethanoic acid ethanol gasoline methane 5 lkenes are manufactured by cracking hydrocarbons obtained from petroleum. hydrocarbon P obtained from petroleum cracking hydrocarbon Q Which row describes the size of the molecules in hydrocarbons P and Q and the effect of Q on aqueous bromine?

4 Save My Exams! The ome of Revision For more awesome GSE and level resources, visit us at 6 ydrocarbons obtained by fractional distillation of petroleum can be cracked to make useful products. Which substance could not be obtained by cracking propane, M r 44? uring the process of cracking hydrocarbons, an is converted into an The presence of an can be shown by a visible reaction with Which words complete gaps 1, 2, 3 and 4? 8 Which statement about alkenes is not correct? They are hydrocarbons. They are saturated. They contain a = bond. They form polymers.

5 Save My Exams! The ome of Revision For more awesome GSE and level resources, visit us at 9 Which molecular structure shows hexene? 10 Which statement about alkenes is not correct? The functional group is =. The structural difference between one member and the next is 3. They form a homologous series. They turn aqueous bromine from brown to colourless. 11 The diagram shows a reaction sequence. X Y butane ethene ethanol Which row names the processes X, Y and Z? Z carbon dioxide and water X Y Z cracking fermentation respiration cracking hydration combustion distillation fermentation respiration distillation hydration combustion

6 Save My Exams! The ome of Revision For more awesome GSE and level resources, visit us at 12 lkenes are manufactured by cracking hydrocarbons obtained from petroleum. alkane X obtained from petroleum cracking alkene Y Which row describes the process of cracking? 13 X, Y and Z are three hydrocarbons. X 2 = 2 Y 3 = 2 Z 3 2 = 2 What do compounds X, Y and Z have in common? They are all alkenes. They are all part of the same homologous series. They all have the same boiling point. 1, 2 and 3 1 and 2 only 1 and 3 only 2 and 3 only

7 Save My Exams! The ome of Revision For more awesome GSE and level resources, visit us at 14 The diagram shows the cracking of substance X. cotton wool soaked in X catalyst Y heat water Which type of organic compound is found in Y, which is not present in X? acid alcohol alkane alkene

8 Save My Exams! The ome of Revision For more awesome GSE and level resources, visit us at 15 The diagram shows some properties of two organic compounds X and Y. reacts with bromine used as a fuel X steam and a catalyst Y polymerises used as a solvent What are X and Y? X ethane ethane ethene ethene Y ethanoic acid ethanol ethanoic acid ethanol

9 Save My Exams! The ome of Revision For more awesome GSE and level resources, visit us at 16 chemist carried out a cracking reaction on a hydrocarbon, X, and obtained two products, Y and Z. X + Y Z The chemist then wrote the following statements in his notebook molecule of X has 7 carbon atoms. Y is unsaturated. Z will decolourise bromine water. Which statements are correct? 3 only 1 and 2 1 and 3 1, 2 and 3 17 Molecule X is both an alkene and a carboxylic acid. Which row describes X? 18 Which hydrocarbon reacts with steam to produce ethanol?

10 Save My Exams! The ome of Revision For more awesome GSE and level resources, visit us at 19 lkenes have the general formula n 2n. Which of the following is an alkene? The structure of a compound is shown. Which functional groups are present in this compound? 21 When a long chain hydrocarbon is cracked, the following products are produced Which products would decolourise bromine water? 1 and 4 2 and 3 2 only 3 only

11 22 The diagram shows the structure of a compound. To which classes of compound does this molecule belong? 23 Which structure is incorrect? Save My Exams! The ome of Revision For more awesome GSE and level resources, visit us at

12 Save My Exams! The ome of Revision For more awesome GSE and level resources, visit us at 24 The apparatus shows an experiment used to test gas X. gas X orange bromine solution The bromine solution quickly becomes colourless. What is the structure of gas X? 25 Which element is not added to a fertiliser? aluminium nitrogen phosphorus potassium

1 Compound Q decolourises bromine water. Compound Q has two carbon atoms in each molecule. Which statement about compound Q is correct?

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