Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Organic Chemistry
785 practice questions
Topics covered
Practice questions
161–170 of 335 · Normal
Question 161
1 mark · Normal
Answer and check →Which observation confirms that a compound is an alkane, rather than an alkene, when tested with bromine water?
- A.The solution becomes colourless.
- B.The solution stays orange.
- C.A gas is given off.
- D.The solution turns milky.
Question 162
2 marks · Normal
Answer and see the solution →State the displayed formula of the product formed when but-1-ene reacts with bromine water, and give its name.
Question 163
4 marks · Normal
Answer and see the solution →(a)[1 mark]State what is meant by an unsaturated compound.
(b)[2 marks]Describe a chemical test to distinguish between hexane and hex-1-ene.
(c)[1 mark]Predict and state the result for each compound.
Question 164
3 marks · Normal
Answer and see the solution →When 28 g of ethene () gas reacts completely with bromine () solution in an addition reaction, calculate the maximum mass of 1,2-dibromoethane () that can be formed.
Give your answer to the nearest whole number. (Relative atomic masses: H = 1, C = 12, Br = 80)
Question 165
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 166
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 167
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 168
2 marks · Normal
Answer and see the solution →State the type of reaction and name the product formed when ethene reacts with hydrogen.
Question 169
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 170
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)