Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Organic Chemistry
785 practice questions
Topics covered
Practice questions
41–50 of 785
Question 41
2 marks · Easy
Answer and see the solution →Explain why oxygen forms two bonds in the displayed formula of ethanol.
Question 42
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.
Question 43
1 mark · Easy
Answer and see the solution →In the displayed formula below, what type of bond is shown between the two carbon atoms? C—C
Question 44
3 marks · Easy
Answer and see the solution →Answer the following about the typical bonding in displayed formulae.
(a)[1 mark]State the typical number of bonds formed by a hydrogen atom.
(b)[1 mark]State the typical number of bonds formed by a carbon atom.
(c)[1 mark]State the typical number of bonds formed by an oxygen atom.
Question 45
2 marks · Easy
Answer and see the solution →How many total bonds (lines) should be drawn in the displayed formula of ethane (\ce{C2H6}\))?
Question 46
2 marks · Normal
Answer and see the solution →Draw the displayed formula for ethene (C2H4).
Question 47
4 marks · Normal
Answer and see the solution →The displayed formula of a molecule is shown below:
(a)[1 mark]State the total number of carbon, hydrogen and oxygen atoms present in the molecule.
(b)[1 mark]Identify the functional group present in this molecule.
(c)[1 mark]Describe the connectivity of the oxygen atom in this molecule.
(d)[1 mark]State the types of bonds present between the carbon atoms and the oxygen atom in this displayed formula.
Question 48
3 marks · Normal
Answer and see the solution →Methanol is a simple alcohol. Using your knowledge of typical bonding, calculate the total number of bonds present in a molecule of methanol ().
Question 49
3 marks · Normal
Answer and see the solution →Explain why alkanes with four or fewer carbon atoms can be represented with straight-chain displayed formulae, and why each carbon has four bonds.
Question 50
4 marks · Normal
Answer and see the solution →Displayed formulae and properties of small alkenes Molecule Displayed formula Ethene C = C with each C joined to 2 H Propene C = C - C with hydrogens to fill remaining bonds Butene C = C - C - C with hydrogens to fill remaining bonds Use the displayed formulae in the table to answer the questions.
(a)[1 mark]Identify the type of bond connecting the first two carbon atoms in all molecules.
(b)[2 marks]State the total number of single and double bonds in propene.
(c)[1 mark]Describe how the displayed formula helps you determine the locations of hydrogen atoms in butene.