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प्रश्न
Which of the following polymers are thermoplastic?
(i) Teflon
(ii) Natural rubber
(iii) Neoprene
(iv) Polystyrene
उत्तर
(i) Teflon
(iv) Polystyrene
Explanation:
These are the linear or slightly branched long-chain molecules capable of repeatedly softening on heating and hardening on cooling. These polymers possess intermolecular forces of attraction intermediate between elastomers and fibres. Some common thermoplastics are polythene, polystyrene, polyvinyls, etc.
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संबंधित प्रश्न
Write the name of monomers used for getting the following polymers : Neoprene
Arrange the following polymers in increasing order of their intermolecular forces.
(i) Nylon 6, 6, Buna-S, Polythene.
(ii) Nylon 6, Neoprene, Polyvinyl chloride.
Define thermoplastics with two examples of each.
Define thermosetting polymers with two examples of each.
Which of the following are characteristics of thermosetting polymers?
(i) Heavily branched cross linked polymers.
(ii) Linear slightly branched long chain molecules.
(iii) Become infusible on moulding so cannot be reused.
(iv) Soften on heating and harden on cooling, can be reused.
Which of the following polymers are used as fibre?
(i) Polytetrafluoroethane
(ii) Polychloroprene
(iii) Nylon
(iv) Terylene
Why are rubbers called elastomers?
Can enzyme be called a polymer?
Among the following polymers, the strongest intermolecular forces of attraction are present in:
The polymer, which can be stretched and retains its original status on releasing the force is ______.
