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% … Read more

Formative Practice 9.2 – Form 4 Science (KSSM) Chapter 9

Question 1:What is the main component in glass and ceramic? Answer:Glass: silicaCeramic: clay Question 2:State three applications of glass and ceramic. Answer:Glass:• to make laboratory apparatus such as beakers and conical flasks• to make cooking utensils such as glass pot, casserole dish• to make food container such as glass bottleCeramic:• to make plates and bowls• … Read more

Polymer – Part 4 (Structured Questions)

Question 6:Diagram 3 shows an experiment to compare the elasticity of a natural rubber, (Rubber P) with a natural rubber that has been soaked in sulphur monochloride solution, (Rubber Q).(a) State one hypothesis for this experiment. [1 mark](b) State the variables in this experiment.(i) Controlled variable [1 mark](ii) Manipulated variable [1 mark](c) Based on this … Read more