Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Organic Chemistry
785 practice questions
Topics covered
Practice questions
661–670 of 785
Question 661
7 marks · Hard
Answer and see the solution →Some esters have pleasant smells and are widely used in everyday products.
(a)[2 marks]Give the systematic name of the ester with molecular formula C3H7COOCH3.
(b)[2 marks]State the names of the alcohol and the carboxylic acid needed to make this ester.
(c)[3 marks]Suggest one use of this ester and explain why esters are suitable for this use.
Question 662
1 mark · Easy
Answer and see the solution →State the name of the small molecules joined together to form addition polymers.
Question 663
3 marks · Easy
Answer and see the solution →Poly(ethene) can be made in the laboratory by addition polymerisation.
(a)[1 mark]State the name of the monomer used to produce poly(ethene).
(b)[2 marks]State two conditions (other than the monomer) required for the polymerisation to occur.
Question 664
2 marks · Easy
Answer and see the solution →Explain why addition polymerisation produces only the polymer and no other products.
Question 665
3 marks · Easy
Answer and see the solution →The table below shows the repeat units of three different addition polymers.
Polymer Repeat Unit (displayed formula) Poly(ethene) —CH2—CH2— Poly(propene) —CH2—CH(CH3)— Poly(tetrafluoroethene) —CF2—CF2— (a)[1 mark]Which polymer's repeat unit contains a methyl group (—CH3)?
(b)[1 mark]Give the name of the monomer used to make poly(tetrafluoroethene).
(c)[1 mark]State the general name for the small molecules from which addition polymers are made.
Question 666
3 marks · Easy
Answer and see the solution →The monomer propene has the formula .
(a)[2 marks]Draw the displayed formula of the repeat unit of poly(propene).
(b)[1 mark]Write the name of the polymer formed.
Question 667
2 marks · Easy
Answer and see the solution →A segment of the addition polymer poly(propene) contains 40 repeat units. Each repeat unit has the formula . Calculate the relative molecular mass (Mr) of this portion of the polymer. (Relative atomic masses: C = 12, H = 1)
Question 668
1 mark · Easy
Answer and see the solution →State the type of reaction used to make poly(ethene) from ethene.
Question 669
2 marks · Easy
Answer and see the solution →Poly(propene) is made by the addition polymerisation of propene monomers.
State the number of carbon atoms present in the repeat unit of poly(propene).
Question 670
2 marks · Normal
Answer and see the solution →State the name of the monomer used to make poly(chloroethene). Draw the displayed formula of the repeat unit of poly(chloroethene).