Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Organic Chemistry
785 practice questions
Topics covered
Practice questions
11–20 of 317 · Easy
Question 11
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 12
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 13
1 mark · Easy
Answer and see the solution →State the general formula for the homologous series of alcohols.
Question 14
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 15
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.
Question 16
1 mark · Easy
Answer and see the solution →State the usual number of bonds formed by a chlorine atom in a displayed formula.
Question 17
3 marks · Easy
Answer and see the solution →Draw the displayed formula for propene (\ce{C3H6}\)).
Question 18
2 marks · Easy
Answer and see the solution →An alkane molecule contains 3 carbon atoms. Calculate the total number of hydrogen atoms in its displayed formula.
Question 19
2 marks · Easy
Answer and see the solution →Explain why oxygen forms two bonds in the displayed formula of ethanol.
Question 20
3 marks · Easy
Answer and see the solution →Table 1 shows the molecular formulae of some simple alcohols. Table 1
Alcohol Molecular Formula Methanol CH3OH Ethanol C2H5OH Propanol C3H7OH (a)[1 mark]Name the functional group present in these alcohols.
(b)[1 mark]State the number of carbon atoms in a molecule of propanol.
(c)[1 mark]Draw the displayed formula for methanol.