What is the chemical name of the repeating monomer unit that polymerizes naturally to form natural rubber (polyisoprene)?
Answer and explanation
Correct answer: A. Isoprene (2-methylbuta-1,3-diene)
- Step 1: Recall natural rubber biochemistry: the rubber tree (Hevea brasiliensis) produces latex containing polyisoprene.
- Step 2: The monomer unit of polyisoprene is isoprene, systematically named 2-methylbuta-1,3-diene ().
Answer
Isoprene (2-methylbuta-1,3-diene).
Why not the others: 'Ethene (ethylene)' polymerizes to form polyethene (polythene); 'Chloroethene (vinyl chloride)' polymerizes to form PVC; 'Tetrafluoroethene' polymerizes to form polytetrafluoroethene (Teflon).
Practise more Nuclear Energy, Carbon Compounds, Polymers, and Industrial Chemistry.
Free questions with an explanation for every one, and full timed SPM Malaysia mock tests.
More Nuclear Energy, Carbon Compounds, Polymers, and Industrial Chemistry questions
- What nuclear process occurs when a heavy Uranium-235 nucleus is bombarded by a slow-moving thermal neutron, splitting into two lighter daugh…
- Which physical conditions are required to initiate nuclear fusion between light isotopes of hydrogen (deuterium and tritium)?
- What is the function of boron or cadmium control rods in a commercial nuclear fission reactor?
- What is the function of the moderator, such as heavy water or high-purity graphite, inside a thermal nuclear reactor?
- In Einstein's mass-energy equivalence equation , what physical quantity does the symbol denote?
- Which radioactive isotope is widely utilized in medical oncology to deliver targeted radiotherapy to destroy malignant cancer cells?