Q.1. : Explain why some fibres are called synthetic.
Q.2: Mark the correct answer: Rayon is different from synthetic fibres because(a) It has a silk-like appearance(b) It is obtained from wood pulp(c) Its fibres can also be woven like those of natural fibre.
Q.3: Fill in the blanks:(a) Synthetic fibres are also called _____________ or ________________ fibres.(b) Synthetic fibres are synthesised from raw material called ______________.(c) Like synthetic fibres, plastic is also a _____________ .
Q.4: Give examples that indicate that nylon fibres are very strong.
Q.5: Explain why plastic containers are favoured for storing food
Q.6: Explain the differences between thermoplastics and thermosetting plastics.