Formative Practice 9.3 – Form 4 Science (KSSM) Chapter 9


Question 1:
Name two natural polymers and synthetic polymers and their monomers.

Answer:





Question 2:
Compare the properties of natural rubber and vulcanised rubber.

Answer:



Question 3:
Describe how vulcanised rubber is produced from natural rubber.

Answer:
Heating natural rubber with sulphur
• Natural rubber is heated at a temperature between 100°C to 150°C at high pressure

• 3% to 5% sulphur is added to the heated rubber

Leave a Comment