9
MCQ (Multiple Correct Answer)
Which of the following polymers, need atleast one diene monomer for their preparation?
A
Dacron
B
Buna-S
C
Neoprene
D
Novolac
10
MCQ (Multiple Correct Answer)
Which of the following are characteristics of thermosetting polymers?
A
Heavily branched cross linked polymers
B
Linear slightly branched long chain molecules
C
Become infusible on moulding so cannot be reused
D
Soften on heating and harden on cooling, can be reused
11
MCQ (Multiple Correct Answer)
Which of the following polymers are thermoplastic?
A
Teflon
B
Natural rubber
C
Neoprene
D
Polystyrene
12
MCQ (Multiple Correct Answer)
Which of the following polymers are used as fibre?
A
Polytetrafluoroethane
B
Polychloroprene
C
Nylon
D
Terylene
13
MCQ (Multiple Correct Answer)
Which of the following are addition polymers?
A
Nylon
B
Melamine formaldehyde resin
C
Orlon
D
Polystyrene