Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Chapter
Alkenes
106 practice questions
Topics covered
Practice questions
31–40 of 44 · Easy
Question 31
3 marks · Easy
Answer and see the solution →Hept-1-ene is reacted with bromine water.
(a)[1 mark]Write the structural formula of the product formed.
(b)[1 mark]Name the type of reaction that takes place.
(c)[1 mark]State the name of the organic product.
Question 32
2 marks · Easy
Answer and see the solution →A sample of an alkene is tested with bromine water. The orange colour remains. Calculate the number of carbon–carbon double bonds present in one molecule of the alkene and explain your answer.
Question 33
1 mark · Easy
Answer and see the solution →State the product formed when ethene reacts with steam.
Question 34
3 marks · Easy
Answer and see the solution →(a)[1 mark]Write the balanced chemical equation for the hydrogenation of ethene.
(b)[1 mark]Name the product formed in this reaction.
(c)[1 mark]State the type of reaction taking place.
Question 35
2 marks · Easy
Answer and see the solution →Calculate the mass of water needed to react completely with 7.0 g of ethene in the hydration reaction. (M_r of C2H4 = 28, M_r of H2O = 18)
Question 36
2 marks · Easy
Answer and see the solution →Explain, with reference to the products formed, why the reactions of ethene with hydrogen and with steam are both called addition reactions.
Question 37
3 marks · Easy
Answer and see the solution →Addition reactions of ethene Reactant Product Type of Reaction Hydrogen Water (steam) (a)[2 marks]Complete the table by naming the products of these reactions.
(b)[1 mark]State the type of reaction for both cases.
Question 38
1 mark · Easy
Answer and see the solution →Write the molecular formula of the product when ethene is hydrogenated.
Question 39
3 marks · Easy
Answer and see the solution →(a)[1 mark]Name the starting materials used in the industrial production of ethanol from ethene.
(b)[1 mark]Write the balanced equation for this process.
(c)[1 mark]State one condition required for this reaction.
Question 40
2 marks · Easy
Answer and see the solution →How many moles of hydrogen are needed to react with 0.60 mol of ethene during hydrogenation?