Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
General formulae
18 practice questions
Practice questions
1–7 of 7 · Easy
Question 1
1 mark · Easy
Answer and see the solution →State the name of the homologous series that has the general formula .
Question 2
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.
Question 3
2 marks · Easy
Answer and see the solution →An alkene contains 6 carbon atoms. Calculate the number of hydrogen atoms in this molecule. Show your working.
Question 4
2 marks · Easy
Answer and see the solution →Explain how the presence of a functional group allows chemists to predict the chemical behaviour of organic compounds in the same homologous series.
Question 5
1 mark · Easy
Answer and see the solution →State the general formula for the homologous series of alcohols.
Question 6
3 marks · Easy
Answer and see the solution →(a)[1 mark]State what is meant by a functional group.
(b)[1 mark]Name the functional group present in all alkenes.
(c)[1 mark]Explain how the functional group affects the chemical properties of the compounds in a homologous series.
Question 7
2 marks · Easy
Answer and see the solution →The general formula for alkanes is .
An alkane molecule contains 5 carbon atoms.
Calculate the number of hydrogen atoms in this molecule. Show your working.