Which of the following materials take the longest to degenerate?
However natural waste and products made from nature break down easily when they are disposed of as waste.
Rayon is a semi-synthetic polymer and is taken as a better choice than cotton fabric.
Mechanical and aesthetic properties of cellulose can be improved by acetylation.
Both assertion and reason are correct and the reason is the correct explanation for the assertion.
Polycot is a mixture of:
Which of the following substances is bio-degradable?
The cloth is a natural polymer made from cellulose. Cotton, silk, wool is biodegradable while plastics (thermoplastic, thermosetting plastics, PVC) are synthetic polymers and are non-biodegradable.
A yarn can be split into fine strands of a thread. StateTrue or False.
Ropes made of_______are used in cranes and lifts.
__________is not a natural fibre.
Which resembles in properties with wool?
The plastics which soften upon being heated but regain all their original properties on cooling are known as?
The plastic that is used in making uniforms of firemen is
Which plastic is called fireproof plastic?
Shellac secreted by lac insects is:
Which of the following is known as regenerated fibre?
Which of these fibres is non-biodegradable?
Incineration of plastics causes: