Q. No.Classify the polymers into addition and condensation polymers: Terylene, Bakelite, Polyvinyl chloride, Polythene.
1.
Addition polymers: Terylene, bakelite; Condensation polymers: Polyvinyl chloride, polythene
2.
Addition polymers: bakelite; Condensation polymers: Terylene, bakelite, Polyvinylchloride, polythene
3.
Addition polymers: polythene; Condensation polymers: Terylene, bakelite, Polyvinylchloride
4.
Addition polymers: Polyvinyl chloride, polythene; Condensation polymers: Terylene, bakelite
The difference between Buna-N and Buna-S is :
| 1. | Buna-N is a copolymer of 3−butyne, and acrylonitrile while Buna-S is a copolymer of 3−butyne, and styrene. |
| 2. | Buna-S is a copolymer of 3−butyne, and acrylonitrile while Buna-N is a copolymer of 3−butyne, and styrene. |
| 3. | Buna-N is a copolymer of 1,3−butadiene, and acrylonitrile while Buna-S is a copolymer of 1, 3−butadiene, and styrene. |
| 4. | Buna-S is a copolymer of 1,3−butadiene, and acrylonitrile while Buna-N is a copolymer of 1, 3−butadiene, and styrene. |
On the basis of molecular forces, polymer can be classified as -
1. Elastomers
2. Fibres
3. Thermoplastic polymers
4. All of the above
The term copolymerization means formation of polymer from :
1. The same monomer.
2. Two or more different monomers.
3. Acid and base.
4. Elastomer.
The examples of thermoplastics and thermosetting polymers are respectively :
| 1. | Thermoplastics:polythene, urea-formaldehyde resins ; Thermosetting : bakelite, polystyrene |
| 2. | Thermoplastics: bakelite, polystyrene; Thermosetting : polythene, urea-formaldehyde res |
| 3. | Thermoplastics:polythene, polystyrene ; Thermosetting : bakelite, urea-formaldehyde resins |
| 4. | Thermoplastics:bakelite, urea-formaldehyde resins ; Thermosetting : polythene, polystyrene |
The presence of double bonds in rubber molecules increase -
1. Viscosity
2. Elasticity
3. Surface Tension
4. Vapour pressure
The purpose of vulcanization of rubber is/are -
1. To maintain the elasticity of natural rubber.
2. To improve the tensile strength of natural rubber.
3. To use for a wide range of temperatures.
4. All of the above.
The salient feature of biodegradable polymer is:
1. Polymer that can be decomposed.
2. Polymer that cannot be decomposed.
3. Polymer that can be denatured.
4. Polymer that cannot be denatured.
The common chain initiator amongst the following in a free radical reaction is :
1. Benzoyl peroxide.
2. Ozone.
3. Chlorine.
4. None of the above.
The incorrect statement regarding condensation polymer is:
| 1. | Reaction occurs between two different bi-functional or tri-functional monomers. |
| 2. | Elimination of small molecules like water ammonia etc, takes place. |
| 3. | Nylon 6,6 is an example of condensation polymer. |
| 4. | Elimination of large molecules like butanol takes place. |
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