Which of the following fibres is an example of a semi-synthetic polymer?
Rayon
The correct answer is Rayon.
Revision Table: Polymer Classifications Term Definition Example (Fibre) Polymer Large molecule made of repeating units (monomers) N/A Semi-synthetic polymer Chemically modified natural polymer Rayon Synthetic polymer Man-made from monomers Nylon, Polyester Additional Information on Rayon and Semi-synthetic Fibres Rayon was one of the earliest man-made fibres and was initially developed as an artificial silk. Different processes like the viscose process, cuproammonium process, and saponification of cellulose acetate yield different types of rayon (viscose rayon, cuprammonium rayon, saponified cellulose acetate). Cellulose acetate is another important semi-synthetic polymer fibre, often used in textiles and cigarette filters, which is derived from cellulose by reacting it with acetic anhydride.
Important Questions from Classification of Materials
Pure graphite contains
Which statement about Curie point is correct?
Arrange the following in ascending order of their dielectric constant:
(A) Si 3N 4
(B) Ge
(C) GaAs
(D) SiO 2
Choose the correct answer from the options given below:
Arrange the following in terms of their dielectric strength in ascending order:
(A) Bakelite
(B) Mica
(C) Paper (impregnated)
(D) Teflon
Choose the correct answer from the options given below:
What type of magnetic behaviour is observed in a type I superconductor?
