Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Organic Chemistry
785 practice questions
Topics covered
Practice questions
151–160 of 785
Question 151
5 marks · Hard
Answer and see the solution →This question is about alcohols.
(a)[1 mark]State the functional group present in all alcohols.
(b)[1 mark]Give the displayed formula for the functional group found in alcohols.
(c)[2 marks]A student draws the following structural formula:
Identify the functional group in this compound and describe its role in classifying this molecule as an alcohol.
(d)[1 mark]Explain why different alcohols have similar chemical properties, referring to their structure.
Question 152
2 marks · Hard
Answer and see the solution →A student notices that the names of several compounds below all end in '-ol':
methanol, propanol, butanol
Explain what the suffix '-ol' shows about these compounds. Give a reason for your answer.
Question 153
1 mark · Easy
Answer and see the solution →State the reaction type for the process where a hydrocarbon reacts with excess oxygen to form carbon dioxide and water.
Question 154
3 marks · Easy
Answer and see the solution →Classify each of these organic reactions as addition, substitution, or combustion.
(a)[1 mark]C2H4(g) + H2(g) C2H6(g)
(b)[1 mark]CH4(g) + Cl2(g) CH3Cl(g) + HCl(g)
(c)[1 mark]C3H8(l) + 5O2(g) 3CO2(g) + 4H2O(l)
Question 155
2 marks · Easy
Answer and see the solution →Explain why the reaction between ethene (C2H4) and bromine (Br2) is classified as an addition reaction.
Question 156
3 marks · Easy
Answer and see the solution →The table shows equations for three organic reactions. Use the information to answer the questions.
Table 1: Organic reactions Equation Type (to classify) C2H6(g) + Cl2(g) → C2H5Cl(g) + HCl(g) C2H4(g) + HCl(g) → C2H5Cl(g) C2H6(g) + O2(g) → CO2(g) + H2O(l) (a)[1 mark]Reaction 1: State the reaction type.
(b)[1 mark]Reaction 2: State the reaction type.
(c)[1 mark]Reaction 3: State the reaction type.
Question 157
1 mark · Easy
Answer and see the solution →What type of reaction occurs when one atom or group in a molecule is replaced by a different atom or group?
Question 158
3 marks · Easy
Answer and see the solution →Classify each reaction below as substitution, addition, or combustion. For each, briefly state the reason for your answer.
(a)[1 mark]But-2-ene reacts with hydrogen to form butane.
(b)[1 mark]Methane reacts with fluorine to form fluoromethane and hydrogen fluoride.
(c)[1 mark]Propanol burns in excess oxygen to produce carbon dioxide and water.
Question 159
2 marks · Easy
Answer and see the solution →Propane ([31m[0m) burns in a large supply of oxygen.
(a)[2 marks]Write the balanced chemical equation for the complete combustion of propane.
Question 160
2 marks · Easy
Answer and see the solution →Consider the following reaction: [31m[0m.
(a)[2 marks]State the type of reaction shown and explain your answer.