JAMB Chemistry 1987 Question 47

Question 47

Polymers

Synthetic rubber is made by polymerization of

  1. A.2 methyl buta – 1, 3 – diene
  2. B.2 methyl buta – 1,2– diene
  3. C.2 methyl but–1–ene
  4. D.2 methyl but–2–ene
Show the answer and explanation

Answer: A (2 methyl buta – 1, 3 – diene)

Explanation

Rubber is a polymer of isoprene, which is 2-methylbuta-1,3-diene. Its two double bonds allow it to form the long rubber chain.