Since plastics are not generally attacked by chemicals, so they are ideal substitutes for
wood
Metals
Glass
All of these
Which of the following properties are possessed by synthetic fibres ?I. They have low tensile strength.II. They show the property of elasticity.III.They do not wrinkle.
I and II only
I and III only
II and III only
All of the above.
Select the one that is a natural fibre.
Cellulose
Nylon
Dacron
Terylene
To which of the following 4R principle apply most?
Synthetic fibre
Natural fibre
Plastic
Which of the following are correct about acrylic?I. It is synthetic fibre that resembles wool.II. It is also called lycra.III.It is also known as orlonIV.It is used in making T-shirts and caps.
II and IV only
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
I, II and IV only
The sorter's disease is caused by a bacteria:
Anthrax
Bacillus
Virus
Aedes
Silk is obtained from ____________ of the silk moth.
Pupa
Larva
Cocoon
Caterpillar
Which of the following is true for plastics ?
Like synthetic fibres, plastics are also polymers.
Thermo-plastics are harder and stronger than thermosetting plastics.
Bakelite is a thermoplastic.
None of the above
Commonly used synthetic fabrics areI. RayonII. NylonIII. PolyesterIV. Acrylic
I, II and III only