A. Thiokol
B. Phenol formaldehyde
C. Urea formaldehyde
D. Polystyrene
Related Mcqs:
- Which of the following is not an elastomer ?
A. Polyisoprene
B. Neoprene
C. Nitrile-butadiene
D. None of these - Acrylonitrile-butadiene-styrene (ABS) copolymer, which is produced by blending styreneacrylonitrile copolymer with butadiene based elastomer, is a/an__________________?
A. Rigid foam
B. Engineering plastic
C. Thermosetting polymer
D. Spongy rubber - Polymers are classified into four categories namely thermosetting, thermoplastic, elastomer and fibre depending upon their________________?
A. Molecular sizes
B. Magnitude of intermolecular forces
C. Resistance to heat
D. Polymerisation mechanism
Answer: Option B - Natural rubber is obtained from latex, which is a colloidal dispersion of rubber in water. Which of the following is used as a coagulant in latex ?
A. Ammonium alum
B. Potassium alum
C. Both A. & B.
D. Neither A. nor B. - In a cross linked polymer, the monomeric units are linked together to constitute a three dimensional network. Which of the following is a cross-linked polymer ?
A. Bakelite (phenol formaldehyde)
B. Polyester
C. Polythene
D. Nylon-6 - Which of the following polymers belong to the class of formaldehyde resin ?
A. Melamine resins
B. Teflon
C. Dacron
D. None of these - Which of the following is generally not used as eord for synthetic rubber tyre casing ?
A. Dacron
B. Nylon
C. Cellulose
D. None of these - Which of the following is not the commercial name of poly-methyl-methacrylate (PMMA) ?
A. Perspex
B. Lucite
C. Plexiglass
D. Teflon - Which of the following is stretched into fibers ?
A. Saturated polyester
B. Unsaturated polyester
C. Isoprene
D. Bakelite - Cellulose acetate has very high film permeability among all the polymers of the order of 5000 gm/100 m2. Which of the following polymers has the maximum film elongation (of the order of 100%) ?
A. Water impermeable cellophane
B. Polythene
C. Cellulose acetate
D. Teflon
