A. 25
B. 50
C. 70
D. 90
Related Mcqs:
- Polycaprolactam (Nylon – 6) is produced by the condensation polymerisation of caprolactam at 240-280°C in which the conversion of caprolactam is about ______________ percent?
A. 50
B. 75
C. 90
D. 99 - Caprolactam, a raw material for the manufacture of nylon-6, is produced from_______________?
A. Phenol
B. Naphthalene
C. Benzene
D. Pyridine - 90% of the caprolactam is converted to nylon-6 on its condensation polymerisation in the reactor maintained at a temperature of _____________ °C?
A. -5
B. 10-30
C. 250-280
D. 500-600 - Condensation polymerisation of caprolactam is carried out in the reactor maintained at a temperature of __________ °C for producing nylon-6?
A. -20 to 25
B. 50 to 75
C. 100 to 150
D. 250-280 - The starting material used for the manufacture of caprolactam is________________?
A. Ethyl benzene
B. Cyclohexane
C. Ethylene glycol
D. DMT - 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 - Out of all the elastomers, natural rubber has the longest elongation range & flexibility of the order of _______________ percent?
A. 1-1000
B. 1000-1500
C. 1500-2000
D. 2000-2500 - Cellulose content in bamboo fibre is about ______________ percent?
A. 10
B. 20
C. 50
D. 85 - 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 - Melt spinning of polymers involves the forcing of polymer melt through spinnerates (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
