Synthetic fibres and plastics Worksheet-1
A. Wool B. Rayon
C. Acrylic (orlon or acrilon) D. Polywool
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 fibres.
These objects are made up of _____.
A. Polystyrene B. Acrilan
C. Polyethylene D. PVC
A. Melamine B. Bakelite
C. P.V.C D. Polypropylene
A. Is a thermosetting plastic B. Is a thermoplastic
C. Is a low density plastic D. Is resistant to heat
B. High density polyethylene
A. Polyester and cotton B. Rayon and cotton
C. Orlon and cotton D. Jute and cotton
Explanation: Rayon is obtained by chemical treatment of wood pulp. It is a semi synthetic fibre.
Explanation: Bakelite is a thermosetting polymer. It is hard and is poor conductor of heat and electricity.
Explanation: Melamine is a thermosetting plastic.
Explanation: Polyvinyl chloride is used for making artificial floor covering.
Explanation: Terrylene is a polyester which is mixed with cotton to make terycot. Terylene is highly resistant to the action of chemicals. It is quite strong and durable. Terycot has a better absorbing capacity as compared to terylene.