Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Organic Chemistry
785 practice questions
Topics covered
Practice questions
721–730 of 785
Question 721
1 mark · Easy
Answer and see the solution →State the small molecule that is produced each time two monomers join together during polyester formation.
Question 722
3 marks · Easy
Answer and see the solution →The formation of a polyester involves two different types of monomers.
(a)[1 mark]Name the two types of organic molecules needed to make a polyester.
(b)[2 marks]Describe how these two monomers react together to form a polyester.
Question 723
2 marks · Easy
Answer and see the solution →A polyester is made by reacting 3 molecules of propane-1,3-diol (CH2OHCH2CH2OH) with 3 molecules of ethane dioic acid (HOOC–COOH). Calculate the total number of water molecules produced in this reaction.
Question 724
2 marks · Easy
Answer and see the solution →Explain why polyesters are classified as condensation polymers, not addition polymers.
Question 725
3 marks · Easy
Answer and see the solution →The table shows the names and structures of two monomers used to make a polyester.
Monomers for polyester synthesis Monomer Structural formula Butane-1,4-diol HOCH2CH2CH2CH2OH Propane-1,3-dioic acid HOOCCH2CH2COOH (a)[1 mark]Identify which monomer is a diol.
(b)[1 mark]State the functional group present in the acid monomer.
(c)[1 mark]When these two monomers react, what type of linkage forms between them in the polyester chain?
Question 726
1 mark · Easy
Answer and see the solution →Give one use of polyesters.
Question 727
3 marks · Easy
Answer and see the solution →This question is about polyester formation.
(a)[1 mark]Complete the sentence: Polyesters are made by __________ polymerisation.
(b)[2 marks]State the two functional groups needed on the monomers to form a polyester.
Question 728
2 marks · Easy
Answer and see the solution →A polyester is made from 7 molecules of hexane-1,6-dioic acid reacting completely with 7 molecules of ethan-1,2-diol. How many ester links are formed in the resulting polyester molecule?
Question 729
2 marks · Normal
Answer and see the solution →State the names of the two different types of monomers that react together to form a polyester. For each type, give one example.
Question 730
4 marks · Normal
Answer and see the solution →(a)[2 marks]Describe what is meant by condensation polymerisation in the formation of polyesters.
(b)[2 marks]Draw the displayed formula for the repeat unit of a polyester made from ethane-1,2-diol and propane-1,3-dioic acid.