SPM Science 2017, Paper 2 (Question 7)

Question 7:
Diagram 7.1 shows various use of synthetic rubber.

Diagram 7.1

(a) Based on Diagram 7.1, state the major use of synthetic rubber. [1 mark]

(b) State two characteristics of synthetic rubber which is used to make shoe soles. [2 marks]

(c) Diagram 7.2 shows the formation of vulcanised rubber.

Diagram 7.2

(i) What is process R? [1 mark]
(ii) Draw the structure of vulcanised rubber in the space provided on Diagram 7.2. [1 mark]
(iii) State one function of sulphur in the formation of vulcanised rubber. [1 mark]

(a) Tyre

1. Heat resistant
2. Hard
3. Water resistant
(Choose any two)



To prevent rubber polymer from sliding with each other

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