Which of the following are thermoplastics ?I. Poly-vinyl chlorideII. Poly- styreneIII. PolytheneIV. Bakelite
I and II only
II and III only
I, II and III only
I, II and IV only
During long distance travel you would like to take drinking water in a bottle made up of:
Select the material that is used to make ropes for use in rock climbing.
Since plastics are not generally attacked by chemicals, so they are ideal substitutes for
All of these
Silk is obtained from ____________ of the silk moth.
Wool is obtained from _______ of sheep.
All of the above
In present times, plastics are used by majority of people becauseI. Plastics are quite cheap.II. Plastics can be handled with ease.III.Plastics are unbreakable.IV.Plastics are light-weight.
I, II, and III only
Raw materials for most of the fabrics are obtained from
None of these
Commonly used synthetic fabrics areI. RayonII. NylonIII. PolyesterIV. Acrylic
The sorter's disease is caused by a bacteria: