Which of the following is the first artificially prepared fibre?
Arrange the following fibres in the order of increasing strength (keeping the fibre of least strength first) :
Nylon, Cotton , Wool, Polyester, Silk
Which of the following is not a thermoplastic polymer ?
(a) polyester (b) melamine (c) nylon (d) polyvinyl chloride
Which of the following has cross-linked polymer chains ?
(a) bakelite (b) polyester (c) PVC (d) nylon