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.Management Sciences
Category: Polymer Technology
Bakelite (phenol-formaldehyde) resin cannot be used as________________?
A. Decorative paint
B. Decorative laminates
C. Electrical insulation
D. Glass reinforced plastics
Tubeless tyres are made of ______________ rubber, which is a co-polymer of isoprene & isobutylene?
A. Nitrile
B. Silicone
C. Neoprene
D. Butyl
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.
Polystyrene is a light, transparent, thermoplastic material used for making __________________?
A. Toys and combs
B. Packaging bags
C. Non-sticking utensils
D. Electrical insulation
Elastomers are__________________?
A. Thermosetting material
B. Exemplified by protein derivatives
C. Having high flexural strength
D. Having very high tensile strength and heat resistance
Polypropylene is preferred to polythene, because the former is ____________________?
A. Non-inflammable
B. Harder
C. Stronger
D. Both B. & C.
The repeating units of PTFE are___________________?
A. Cl2CH-CH3
B. F2 C = CF2
C. F3 C-CF3
D. FClC = CF2
Thermosetting polymers as compared to thermoplastic polymers_____________________?
A. Are formed by addition polymerisation
B. Have three dimensional structure
C. Have linear structure
D. None of these
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