Synthetic Fibres And Plastics Test - 2

Group I - Nylon is a synthetic fibre, but all others are natural.
Group II - PVC is a thermoplastic where as all others are thermosetting plastics.
Group III - Acrylic is not a blended fibre.

Silk is a protein fibre made up of fibroin protein secreted by the silkworm to make its cocoon.
Linen is a cellulose fibre, whereas spandex is a synthetic fibre.
Kente cloth is the name given to fabric woven in a particular style.

I. Natural fibres are produced by plants, animals and geological processes. They are biodegradable over time.
II. Wood fibre is used for making paper.
III. Asbestos is a naturally occurring mineral fibre.
IV. Cotton and hemp are examples of cellulose fibres.

Vulcanisation is a chemical process for converting natural rubber or related polymers into more durable materials by heating them with sulphur.

Nylon fibre has a lot of tensile strength and is stronger than a steel wire.
This property makes it a suitable material for making parachutes and ropes for mountain climbers.

Polyethylene Terephthalate, known commonly as PET or PETE, is the clear plastic used for water and soda bottle containers.
It is an example of polyesters as it is formed by the linking together of ester molecules.

The repeating units in polyesters are esters, which are organic compounds having a fruity odour.

Both statements I and II are correct and statement II is the correct reason for statement I.
Some biodegradable synthetic polymers have been designed which can be broken down by the enzymes in the bodies of living organisms and are used to make medicine capsules and to give internal stitches during surgeries.