Cation exchange resins used in water treatment is made from _____________ resin?

A. Urea formaldehyde
B. Epoxy
C. Amino
D. Phenolic

In case of dry spinning of polymers, the polymer solution in a volatile solvent is forced through the spinnerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry spinning is used for _______________ fibres?

A. Polythene
B. PVC
C. Rayon
D. Polyvinyl acetate

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.

Neoprene is rendered non-inflammable, because of_____________________?

A. Its cross-linked structure
B. Its linear chain structure
C. The presence of chlorine atoms in its monomer
D. The absence of chlorine atoms in its monomer

Which of the following is the most important rubber compounding ingredient which is used to improve wearing qualities of both natural rubber & SBR by imparting toughness ?

A. Phosphorous
B. Carbon black
C. Pine oil
D. Rosin

____________ polymer is used for making unbreakable crockery?

A. Thermoplastic
B. Melamine
C. Addition
D. None of these

Tubeless tyres are made of ______________ rubber, which is a co-polymer of isoprene & isobutylene?

A. Nitrile
B. Silicone
C. Neoprene
D. Butyl

Orlan fibre which is used as a wool substitute is __________________?

A. An amorphous polymer
B. A natural polymeric fibre
C. Polyacrylonitrile
D. Poly-methyl-methacrylate (PMMA)

Phosphates (e.g., tricresyl, tributyl, tetrabutyl, triphenyl etc.) are added to polymers to act as __________________?

A. Hardeners
B. Anti-shrinkage agents
C. Plasticisers
D. Transparency improver

Polyurethane cannot be used for making____________________?

A. Mattresses & foam
B. Coating material
C. Adhesives
D. Bottles