Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Chapter
Introduction to Organic Chemistry
185 practice questions
Topics covered
- Types of formula for organic molecules19 practice questions
- General formulae18 practice questions
- Displayed formulae19 practice questions
- Naming organic compounds19 practice questions
- Coding for the type of compound19 practice questions
- Coding for branched chains19 practice questions
- Structural isomerism in the alkanes19 practice questions
- A quick introductory look at the alcohols20 practice questions
- Some chemical reactions of organic compounds21 practice questions
Practice questions
1–10 of 74 · Easy
Question 1
1 mark · Easy
Answer and see the solution →State the molecular formula of ethene.
Question 2
3 marks · Easy
Answer and see the solution →(a)[1 mark]Draw the displayed formula of methane.
(b)[1 mark]Write the molecular formula of methane.
(c)[1 mark]Give the empirical formula of methane.
Question 3
2 marks · Easy
Answer and see the solution →A compound has the empirical formula CH2. Its relative molecular mass is 56. Calculate its molecular formula. Show your working.
Question 4
2 marks · Easy
Answer and see the solution →Explain the difference between a structural formula and a molecular formula for an organic compound. Give an example for each.
Question 5
3 marks · Easy
Answer and see the solution →The table shows information about three organic compounds.
Compound Type of formula Formula ethane molecular C2H6 propene empirical CH2 butane displayed (a)[1 mark]State the type of formula shown for propene.
(b)[1 mark]Complete the table: Give the displayed formula for butane.
(c)[1 mark]Write the empirical formula for ethane.
Question 6
1 mark · Easy
Answer and see the solution →Name the type of formula that shows all the bonds between atoms in a molecule.
Question 7
3 marks · Easy
Answer and see the solution →(a)[1 mark]State the empirical formula of ethene.
(b)[1 mark]Write the molecular formula of ethene.
(c)[1 mark]Draw the displayed formula of ethene.
Question 8
2 marks · Easy
Answer and see the solution →A hydrocarbon has the empirical formula CH. If the molar mass of the compound is 78 g/mol, calculate its molecular formula. Show your working.
Question 9
1 mark · Easy
Answer and see the solution →State the name of the homologous series that has the general formula .
Question 10
3 marks · Easy
Answer and see the solution →(a)[1 mark]What is meant by the term "functional group" in organic chemistry?
(b)[1 mark]State the functional group found in carboxylic acids.
(c)[1 mark]Explain why the functional group is important in a homologous series.