Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Other important addition reactions of alkenes
19 practice questions
Practice questions
1–8 of 8 · Normal
Question 1
2 marks · Normal
Answer and see the solution →Write a balanced chemical equation for each of the following reactions involving ethene:
(a)[1 mark]Hydrogenation of ethene to form an alkane.
(b)[1 mark]Hydration of ethene to form an alcohol.
Question 2
4 marks · Normal
Answer and see the solution →Ethene can undergo different addition reactions.
(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]Write the balanced chemical equation for the hydration of ethene (include state symbols for steam and ethanol).
(d)[1 mark]State two conditions required for the hydration of ethene.
Question 3
1 mark · Normal
Answer and check →Which product is formed when ethene reacts with steam under suitable conditions?
- A.Methanol
- B.Ethanol
- C.Propane
- D.Ethane
Question 4
2 marks · Normal
Answer and see the solution →State the type of reaction and name the product formed when ethene reacts with hydrogen.
Question 5
4 marks · Normal
Answer and see the solution →The hydration and hydrogenation of ethene are both addition reactions important in industry.
(a)[1 mark]Write the balanced equation for the hydrogenation of ethene including the structural formula of the product.
(b)[1 mark]State a use of this reaction in the food industry.
(c)[1 mark]Write the balanced equation for the hydration of ethene to form ethanol, including state symbols.
(d)[1 mark]Give one industrial use for ethanol produced in this way.
Question 6
3 marks · Normal
Answer and see the solution →Ethene is hydrogenated in industry to form ethane by adding hydrogen gas. Calculate the mass of ethane produced when 4.2 g of ethene reacts completely with excess hydrogen. (Relative atomic masses: C = 12, H = 1)
Question 7
3 marks · Normal
Answer and see the solution →The hydration of ethene is used industrially to make ethanol from ethene and steam. Write a balanced chemical equation for this reaction. Give two reasons why converting ethene to ethanol by hydration is important for industry.
Question 8
4 marks · Normal
Answer and see the solution →The table shows two important reactions of ethene.
Addition reactions of ethene Name of reaction Reactants Product Hydrogenation Ethene (), hydrogen () Hydration Ethene (), water (steam, ) (a)Complete the table by writing the balanced symbol equation for each reaction. Write the correct chemical formula for each product.
(i)[1 mark]Hydrogenation of ethene:
(ii)[2 marks]Hydration of ethene:
(b)State the names of the organic products formed in the two reactions above.
(i)[0.5 marks]Product from hydrogenation:
(ii)[0.5 marks]Product from hydration: