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 molding so cannot be reused. |
(d). | Soften on heating and harden on cooling, can be reused |
Choose the correct option
1. (a, c)
2. (a, b)
3. (a, d)
4. (b, d)
Which of the following are addition polymers?
(a) Nylon
(b) Melamine formaldehyde resin
(c) Orlon
(d) Polystyrene
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Which of the following polymers, need atleast one diene monomer for their preparation?
(I) Dacron
(II) Buna-S
(III) Neoprene
(IV) Novolac
Choose the correct option:
1. (I, II)
2. (II, III)
3. (III, IV)
4. (I, III)
Which of the following polymers are thermoplastic?
(a) Teflon
(b) Natural rubber
(c) Neoprene
(d) Polystyrene
Choose the correct option
1. (a, d)
2. (a, b)
3. (a, c)
4. (b, d)
Which of the following polymers are used as fiber?
(a) Polytetrafluoroethane
(b) Polychloroprene
(c) Nylon
(d) Terylene
Choose the correct option
1. (a, b)
2. (c, d)
3. (a, c)
4. (a, d)
Which of the following polymers are condensation polymers?
(a) Bakelite
(b) Teflon
(c) Butyl rubber
(d) Melamine formaldehyde resin
Choose the correct option
1. (b, c)
2. (b, d)
3. (a, b)
4. (a, d)
Which of the following monomers form biodegradable polymers?
(a) S-hydroxybutanoic acid+3-hydroxypentanoic acid
(b) Glycine + aminocaproic acid
(c) Ethylene glycol + phthalic acid
(d) Caprolactam
Choose the correct option
1. (b, c)
2. (a, b)
3. (a, d)
4. (c, d)
Which of the following are examples of synthetic rubber?
(a) Polychloroprene
(b) Polyacrylonitrile
(c) Buna-N
(d) cis-polyisoprene
Choose the correct option
(1) (d, b)
(2) (b, d)
(3) (a, b)
(4) (a, c)
Which of the following polymers can have strong intermolecular forces?
(a) Nylon
(b) Polystyrene
(c) Rubber
(d) Polyesters
Choose the correct option
1. (a, d)
2. (a, c)
3. (a, b)
4. (b, c)
Which of the following polymers have vinylic monomer units?
(a) Acrilan
(b) Polystyrene
(c) Nylon
(d) Teflon
Choose the correct option
1. (b, c, d)
2. (a, b, d)
3. (a, b, c)
4. (a, c, d)