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

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

Low pressure Zeigler process for the manufacture of polythene uses a catalyst which is_______________________?

A. Ni
B. V2O5
C. Fe
D. Aluminium triethyl combined with titanium tetrachloride

Plastic articles are normally produced by _____________ moulding?

A. Green sand
B. Injection
C. Shell
D. Dry sand

Temperature maintained in the emulsion polymerisation reactor for PVC manufacture is about ______________ ° C?

A. -20
B. 50
C. 250
D. 500

Diphenylamine is added to rubber to_________________?

A. Vulcanise it
B. Protect it from deterioration on exposure to air
C. Make it non-inflammable
D. Make it thermosetting

Plastic tubes & pipes are generally made by ______________ moulding?

A. Injection
B. Transfer
C. Extrusion
D. Compression

Which of the following is an elastomer ?

A. Thiokol
B. Phenol formaldehyde
C. Urea formaldehyde
D. Polystyrene

______________ is an addition polymer ?

A. Nylon
B. Bakelite
C. Polythene
D. None of these

Liners of bags are usually made of ____________________?

A. Polythene
B. PVC
C. Polypropylene
D. Polyesters