Hour Science С C Differentiates materials and organisms on the basis of their propertie functions. Identify the type of artificial fibres based on the properties given below (1) Strong, elastic, light as well as lustrous and easily washable fabric ca these fibres. (2) These fibres are obtained by chemical treatment of wood pulp. (3) The fabric made from these fibres is comfortable to wear, does not ge and easy to wash. (4) Different colours of sweater, shawls, and blankets made from these i winter as they are durable and affordable.
Answers
Answer:
You have read in Class VII that silk fibre
obtained from silkworm was discovered
in China and was kept as a closely
guarded secret for a long time. Fabric
obtained from silk fibre was very costly.
But its beautiful texture fascinated
everybody. Attempts were made to make
silk artificially. Towards the end of the
nineteenth century, scientists were
successful in obtaining a fibre having
properties similar to that of silk. Such a
fibre was obtained by chemical
treatment of wood pulp. This fibre was
called rayon or artificial silk. Although
rayon is obtained from a natural source,
wood pulp, yet it is a man-made fibre. It
is cheaper than silk and can be woven
like silk fibres. It can also be dyed in a
wide variety of colours. Rayon is mixed
with cotton to make bed sheets or mixed
with wool to make carpet