Which of the following are polyesters?
Out of the following materials :
Cotton, Nylon, Terylene, Wool, PET, Acrylic
(a) Which materials are polyesters?
(b) Which material is a polyamide ?
(c) Which material is used as a substitute for wool ?
(d) Which material is used as a substitue for glass ?
The manufacture of one of the following artificial fibres contributes to deforestation. This fibre is :
(a) nylon (b) rayon (c) terylene (d) acrylic
The synthetic fibre which contains the organic group similar to those which give fruits their 'sweet smell' is :
(a) nylon (b) acrylic (c) terylene (d) rayon