Question

Which of the following fibre is not a natural fibre?
A.Cotton
B.Silk
C.Nylon
D.Jute

Answer 1

Hint: Fibres which are made or synthesized artificially are synthetic fibres. Fibres like cotton, wool and jute are obtained from nature via animal, plant and mineral sources. Such fibre is known as natural fibre. Synthetic fibre is cost effective than natural fibre.

Complete step by step answer:
- Fibres are filamentous or thread-like structures. They are long, thin and flexible. They are used to make clothes or fabrics. On the basis of their origin, fibres are of two types namely natural fibres and synthetic fibres. Natural fibres as the name suggest these fibres procure from nature via animal, plant or mineral sources. Wool and silk are common animal fibres. Wool is obtained from animals like sheep, goats and camels. Woolen fabrics are used in winter as they have property to trap the air which makes them a bad conductor of heat.
- On the other hand, silk is procured from silkworm animals. The rearing of silkworms to obtain silk is known as sericulture. Cotton and jute are common plant fibres. Cotton fibres are obtained from cotton plants. They are found as bols around the seeds of cotton plants. Cotton fibres are soft fibres and widely used in summer.
- On the other hand, Jute is a vegetable fibre that is soft, shiny and is spun into coarse strong threads. Various handbags made from jute are being widely used. Synthetic fibres as the name suggest these are man-made or we can say artificial fibres synthesized to make fabric. Rayon and nylon are famous artificial fibers.
- Nylon was the first ever synthetic fibre made and it is being widely used in manufacturing of parachutes, sleeping bags for travelers, and ropes. They have very high tensile strength. Nylon is one of the strongest fibers known to us.

Thus, the correct option is C.

Note:
Synthetic fibres like nylon are cheaper than natural fibre like wool and cotton. They are easy to manufacture, use and wash. Their way of manufacturing decides their tensile strength.