(i) How do double bonds in rubber molecules influence their structure…

Previous year question for Advanced Engineering Chemistry.

Question

(i) How do double bonds in rubber molecules influence their structures and reactivity? (5)

(ii) Why is virgin rubber considered useless as pure good? (5)

(iii) Why cannot thermosetting plastics be reused and reshaped? (5)

(iv) Why are plastics indispensable in everyday life? (5)

(v) Why are thinners used in paints. (5)