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
11–20 of 31 · Hard
Question 11
5 marks · Hard
Answer and see the solution →A student is trying to name the following organic compound. The displayed formula is shown below.
(a)[1 mark]i) State the total number of carbon atoms in the molecule.
(b)[1 mark]ii) Identify the functional group present in the molecule.
(c)[1 mark]iii) Write the structural formula for this compound using condensed notation.
(d)[1 mark]iv) State the homologous series to which this compound belongs.
(e)[1 mark]v) Give the correct IUPAC name for this compound.
Question 12
2 marks · Hard
Answer and see the solution →An organic compound has the structural formula shown below:
Give the IUPAC name for this compound.
Question 13
2 marks · Hard
Answer and see the solution →State the code letter for a three-carbon chain in organic compounds. Give the name and the displayed formula for the simplest alkene containing three carbon atoms.
Question 14
5 marks · Hard
Answer and see the solution →The name "propan-1-ol" is given to an organic compound.
(a)[1 mark]State what the code "an" in the name tells you about the carbon atoms in the chain.
(b)[2 marks]Identify the homologous series to which propan-1-ol belongs, and state the code that shows this in the name.
(c)[2 marks]Write the code letter that indicates the compound has three carbon atoms, and explain your answer.
Question 15
2 marks · Hard
Answer and see the solution →Give the code letters and the number of carbon atoms in the chain in ethene. Name the homologous series to which ethene belongs.
Question 16
2 marks · Hard
Answer and see the solution →A hydrocarbon molecule is named 4-methylhexane.
Determine from which end of the main chain numbering should start to give the position of the methyl side chain, and explain your choice.
Question 17
5 marks · Hard
Answer and see the solution →The following hydrocarbon is shown using its skeletal formula:
Skeletal formula of a branched alkane. (a)[1 mark]State the length (number of carbon atoms) in the longest chain of the molecule.
(b)[2 marks]Name the side chain and state the carbon atom number on which it is attached.
(c)[2 marks]Write the complete IUPAC name for this molecule.
Question 18
2 marks · Hard
Answer and see the solution →Give the coding (name) for each of the following side chains found in organic molecules:
Side chain structural formula Code (name) \ce{CH_3}- \ce{CH_3CH_2}- Question 19
2 marks · Hard
Answer and see the solution →Explain why two different molecules with the formula C6H14 are considered structural isomers.
Question 20
5 marks · Hard
Answer and see the solution →This question is about structural isomerism in the alkanes.
(a)[3 marks]Complete the following table for alkanes, giving the number of possible structural isomers for each formula.
Molecular formula Number of structural isomers C3H8 C4H10 C5H12 (b)[2 marks]Explain why C5H12 has more structural isomers than C3H8.