Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Organic Chemistry
785 practice questions
Topics covered
Practice questions
91–100 of 785
Question 91
4 marks · Normal
Answer and see the solution →(a)[1 mark]State the code letter for a six-carbon chain in organic chemistry.
(b)[2 marks]Give the name and molecular formula for the alkane with six carbon atoms.
(c)[1 mark]Explain why the arrangement of atoms may be drawn differently but still represent the same compound.
Question 92
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 93
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 94
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 95
1 mark · Easy
Answer and see the solution →What is the systematic IUPAC name for an alkane with the following skeletal structure?
Skeletal structure: four carbon chain with a methyl group at position 3. Question 96
3 marks · Easy
Answer and see the solution →A hydrocarbon molecule has a side chain attached to its main carbon chain.
(a)[1 mark]State the code for a side chain with the formula .
(b)[1 mark]State the code for a side chain with the formula .
(c)[1 mark]Explain how the codes for methyl and ethyl relate to the number of carbon atoms in the side chain.
Question 97
2 marks · Easy
Answer and see the solution →The structural formula for a hydrocarbon is shown below. The main chain is numbered from left to right.
Diagram: Main chain has five carbon atoms. A methyl group is attached to carbon 2. Give the position of the methyl side chain and write the IUPAC name for this hydrocarbon.
Question 98
2 marks · Easy
Answer and see the solution →A student names the following compound as "2-methylpropane":
Main chain of 3 carbons (numbered 1–3), with methyl groups attached to both carbon 2 and carbon 3. State if this name is correct and explain your answer.
Question 99
3 marks · Easy
Answer and see the solution →The table below shows structures of different side chains found in organic molecules. Study the table and answer the questions.
(a)[2 marks]Side chain structures and codes. Side chain Structure Code A B Complete the 'Code' column for both A and B.
(b)[1 mark]Explain how you identified the codes for the side chains.
Question 100
1 mark · Easy
Answer and see the solution →What is the position of the ethyl side chain in the compound named 3-ethylhexane?