Question 1:
Diagram 1.1 shows the process of latex coagulation.


(a)(i) State one example of chemical P? [1 mark]

(ii) State one characteristic of coagulated latex in Diagram 1.1. [1 mark]

(b) Chemical P in diagram 1.1 is replaced with chemical Q to prevent latex from coagulating.
State one example of chemical Q. [1 mark]


(c) Diagram 1.2 shows the process when natural rubber is heated with Sulphur to form rubber R.

  (i) Name process X. [1 mark]
  (ii) Name rubber R. [1 mark]

(d) Mark (\/) the object which is made of rubber R. [1 mark]




Answer:
(a)(i) Methanoic acid

(a)(ii) Elastic

(b) Ammonia solution

(c)(i) Vulcanization of rubber

(c)(ii) Vulcanized rubber

(d)