Related Questions

The polymer used in making plastic crockery is
A Decron
B Nylon
C Bakelite
D Melamine
Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres.
A Acrylic
B Polyester
C Nylon 6:6
D Polypropylene
Unbreakable crockeries are made from __________ polymers.
A Polystyrene
B Melamine
C Polystyrene
D Polyurathane
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
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
In case of wet spinning of polymers, the polymer solution is forced through spinnerates into, a coagulating bath to give a filament form. Wet spinning is not used in case of the __________ fibres.
A Viscose rayon
B Acrylic
C Polyvinyl acetate
D Saturated polyester
Improper usages of words. choose the option which indicates the sentences in which the underlined word(s) has/have been used incorrectly. i. You need to hear both sides of the story before "making up" your mind. ii. We are "making up" more beds as some unexpected guests have come. iii. The curtains are "make up" of Indian silk.
A i only
B ii only
C iii only
D ii and iii only
Size range of polymer molecules varies from __________ metre.
A 10-2 to 10-5
B 10-4 to 10-7
C 10-1 to 10-2
D 10-8 to 10-10
__________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate.
A Fibrous
B Leathery
C Rubbery
D Hard
__________ is an addition polymer
A Nylon
B Bakelite
C Polythene
D None of these

Next steps