Bristles of tooth brushes are made of_______________?

Related Mcqs:

1. Collapsible tubes for tooth paste are produced by _____________ extrusion?

   A. Direct
   B. Indirect
   C. Impact
   D. None of these

2. Addition polymerisation is not involved in the manufacture of_______________?

   A. Low density polythene
   B. Poly vinyl chloride
   C. Polystyrene
   D. Polyhexamethylene adipamide

3. Caprolactam, a raw material for the manufacture of nylon-6, is produced from_______________?

   A. Phenol
   B. Naphthalene
   C. Benzene
   D. Pyridine

4. Which of the following is not a thermoplastic material ?

   A. Epoxy polymer
   B. PVC
   C. Polystyrene
   D. Polythene

5. Flexible plastic pipes are made of___________________?

   A. High density polyethylene (HDPE)
   B. Low density polyethylene (LDPE)
   C. Polypropylene
   D. Unsaturated polyester

6. Poly Vinyl chloride (PVC) is a ________________ material?

   A. Thermoplastic
   B. Thermosetting
   C. Fibrous
   D. Chemically active

7. Nylon-66 is a polyamide of __________________?

   A. Hexamethylene diamine and adipic acid
   B. Adipic acid and methyl amine
   C. Vinyl chloride and formaldehyde
   D. None of these

8. The starting material used for the manufacture of caprolactam is________________?

   A. Ethyl benzene
   B. Cyclohexane
   C. Ethylene glycol
   D. DMT

9. ________________ is produced by polymerisation of chloroprene?

   A. Thiokol (a polysulphide rubber)
   B. Butyl rubber
   C. Neoprene
   D. Polyurethane rubber

10. Contact lenses for eyes are made of Perspex, which is nothing but_______________?

    A. poly-methyl-methacrylate
    B. Polystyrene
    C. Unsaturated polyester
    D. Polypropylene