19393
Which one among the following is a thermosetting plastic
1 \(PVC\)
2 \(PVA\)
3 Bakelite
4 Perspex
Explanation:
(c) Bakelite is thermosetting polymer. It becomes infusible on heating and can not be remoulded
POLYMERS
19394
The basis on the mode of their formation, the polymers can be classified
1 As addition polymers only
2 As condensation polymers only
3 As copolymers
4 Both as addition and condensation polymers
Explanation:
On the basis of the mode of their formation, the polymers can be classified as addition polymers and condensation polymers. Addition polymers are formed by chain growth polymerization and condensation polymers are formed by the combination of two monomers by the elimination of a small molecule like water or methyl alcohol.
POLYMERS
19395
Thermoplastics are
1 Linear polymers
2 Highly cross-linked
3 Both \((a)\) and \((b)\)
4 Crystalline
Explanation:
A thermoplastic is a material, usually a plastic polymer, which becomes more soft when heated and hard when cooled. They have no cross-linking between chains and are made up of linear molecular chains.
POLYMERS
19396
‘Cis - \(1, 4\) - polyisoprene’ is
1 Thermoplastic
2 Thermosetting plastic
3 Elastic (rubber)
4 Resin
Explanation:
(c) Natural rubber is the only addition polymer of nature and is known as \(C \) is - \(1,\,4 - \) polyisoprene.
19393
Which one among the following is a thermosetting plastic
1 \(PVC\)
2 \(PVA\)
3 Bakelite
4 Perspex
Explanation:
(c) Bakelite is thermosetting polymer. It becomes infusible on heating and can not be remoulded
POLYMERS
19394
The basis on the mode of their formation, the polymers can be classified
1 As addition polymers only
2 As condensation polymers only
3 As copolymers
4 Both as addition and condensation polymers
Explanation:
On the basis of the mode of their formation, the polymers can be classified as addition polymers and condensation polymers. Addition polymers are formed by chain growth polymerization and condensation polymers are formed by the combination of two monomers by the elimination of a small molecule like water or methyl alcohol.
POLYMERS
19395
Thermoplastics are
1 Linear polymers
2 Highly cross-linked
3 Both \((a)\) and \((b)\)
4 Crystalline
Explanation:
A thermoplastic is a material, usually a plastic polymer, which becomes more soft when heated and hard when cooled. They have no cross-linking between chains and are made up of linear molecular chains.
POLYMERS
19396
‘Cis - \(1, 4\) - polyisoprene’ is
1 Thermoplastic
2 Thermosetting plastic
3 Elastic (rubber)
4 Resin
Explanation:
(c) Natural rubber is the only addition polymer of nature and is known as \(C \) is - \(1,\,4 - \) polyisoprene.
19393
Which one among the following is a thermosetting plastic
1 \(PVC\)
2 \(PVA\)
3 Bakelite
4 Perspex
Explanation:
(c) Bakelite is thermosetting polymer. It becomes infusible on heating and can not be remoulded
POLYMERS
19394
The basis on the mode of their formation, the polymers can be classified
1 As addition polymers only
2 As condensation polymers only
3 As copolymers
4 Both as addition and condensation polymers
Explanation:
On the basis of the mode of their formation, the polymers can be classified as addition polymers and condensation polymers. Addition polymers are formed by chain growth polymerization and condensation polymers are formed by the combination of two monomers by the elimination of a small molecule like water or methyl alcohol.
POLYMERS
19395
Thermoplastics are
1 Linear polymers
2 Highly cross-linked
3 Both \((a)\) and \((b)\)
4 Crystalline
Explanation:
A thermoplastic is a material, usually a plastic polymer, which becomes more soft when heated and hard when cooled. They have no cross-linking between chains and are made up of linear molecular chains.
POLYMERS
19396
‘Cis - \(1, 4\) - polyisoprene’ is
1 Thermoplastic
2 Thermosetting plastic
3 Elastic (rubber)
4 Resin
Explanation:
(c) Natural rubber is the only addition polymer of nature and is known as \(C \) is - \(1,\,4 - \) polyisoprene.
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POLYMERS
19393
Which one among the following is a thermosetting plastic
1 \(PVC\)
2 \(PVA\)
3 Bakelite
4 Perspex
Explanation:
(c) Bakelite is thermosetting polymer. It becomes infusible on heating and can not be remoulded
POLYMERS
19394
The basis on the mode of their formation, the polymers can be classified
1 As addition polymers only
2 As condensation polymers only
3 As copolymers
4 Both as addition and condensation polymers
Explanation:
On the basis of the mode of their formation, the polymers can be classified as addition polymers and condensation polymers. Addition polymers are formed by chain growth polymerization and condensation polymers are formed by the combination of two monomers by the elimination of a small molecule like water or methyl alcohol.
POLYMERS
19395
Thermoplastics are
1 Linear polymers
2 Highly cross-linked
3 Both \((a)\) and \((b)\)
4 Crystalline
Explanation:
A thermoplastic is a material, usually a plastic polymer, which becomes more soft when heated and hard when cooled. They have no cross-linking between chains and are made up of linear molecular chains.
POLYMERS
19396
‘Cis - \(1, 4\) - polyisoprene’ is
1 Thermoplastic
2 Thermosetting plastic
3 Elastic (rubber)
4 Resin
Explanation:
(c) Natural rubber is the only addition polymer of nature and is known as \(C \) is - \(1,\,4 - \) polyisoprene.
