Vulcanisation of raw rubber makes it__________________?
Vulcanisation of raw rubber makes it__________________?
A. Soft
B. Less elastic
C. Plastic
D. Tacky
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Vulcanisation of rubber does not increase its_________________?
Vulcanisation of rubber does not increase its_________________?A. Elasticity
B. Plasticity
C. Ductility
D. None of theseBakelite (phenol-formaldehyde) resin cannot be used as________________?
Bakelite (phenol-formaldehyde) resin cannot be used as________________?A. Decorative paint
B. Decorative laminates
C. Electrical insulation
D. Glass reinforced plasticsPolyhexamethylene adipamide is also known as______________?
Polyhexamethylene adipamide is also known as______________?A. Bakelite
B. Nylon-66
C. Epoxy resin
D. Silicone rubberPolythene is a/an________________?
Polythene is a/an________________?A. Addition polymerisation product
B. Condensation polymerisation product
C. Thermosetting material
D. None of theseThe organic acid monomer in nylon-66 is __________________?
The organic acid monomer in nylon-66 is __________________?A. Sebacic acid
B. Terephthalic acid
C. Adipic acid
D. Benzoic acidPolycaprolactam (Nylon – 6) is produced by the condensation polymerisation of caprolactam at 240-280°C in which the conversion of caprolactam is about ______________ percent?
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