Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Organic Chemistry
785 practice questions
Topics covered
Practice questions
51–60 of 785
Question 51
1 mark · Normal
Answer and check →In displayed formulae, what is the usual number of bonds formed by an oxygen atom?
- A.1
- B.2
- C.3
- D.4
Question 52
2 marks · Normal
Answer and see the solution →Draw the displayed formula for butanol ().
Question 53
4 marks · Normal
Answer and see the solution →The displayed formula below represents a simple alkene:
(a)[1 mark]Identify the name of this alkene.
(b)[2 marks]Explain how you used the displayed formula to identify the molecule.
(c)[1 mark]State the total number of hydrogen atoms in this molecule.
Question 54
2 marks · Hard
Answer and see the solution →Figure 1 shows the displayed formula of an organic molecule containing three carbon atoms.
Displayed formula of an organic molecule Describe how you can use this displayed formula to: (i) identify the connectivity (how atoms are joined together) and (ii) determine the types of bonds present in the molecule.
Question 55
5 marks · Hard
Answer and see the solution →Answer the following questions about typical bonding in displayed formulae of organic compounds.
(a)[1 mark]State the typical number of bonds formed by a carbon atom in a displayed formula.
(b)[1 mark]State the typical number of bonds formed by a hydrogen atom in a displayed formula.
(c)[1 mark]State the typical number of bonds formed by an oxygen atom in a displayed formula.
(d)[1 mark]State the typical number of bonds formed by a halogen atom (such as chlorine) in a displayed formula.
(e)[1 mark]Explain why a carbon atom in organic molecules always forms this number of bonds.
Question 56
2 marks · Hard
Answer and see the solution →Draw the displayed formula for ethene ([LaTeX][\ce{C2H4}]).
Question 57
1 mark · Easy
Answer and see the solution →Give the IUPAC name for the compound with the structural formula CH3CH2CH2CH2OH.
Question 58
3 marks · Easy
Answer and see the solution →The displayed formula of a hydrocarbon is shown below:
(a)[1 mark]State the number of carbon atoms in the molecule.
(b)[1 mark]State the homologous series to which this compound belongs.
(c)[1 mark]What is the IUPAC name of this compound?
Question 59
2 marks · Easy
Answer and see the solution →Explain why the compound with the formula CH3CH2CH=CH2 is named but-1-ene according to IUPAC rules.
Question 60
3 marks · Easy
Answer and see the solution →The table shows the structural formulas of three organic compounds.
Structural formulae of compounds Compound Structural formula A CH3CH2CH2CH3 B CH2=CHCH3 C CH3CH2CH2OH (a)[1 mark]Name compound A using IUPAC rules.
(b)[1 mark]Identify the homologous series for compound B.
(c)[1 mark]State the functional group present in compound C.