Plus Two Chemistry Chapter Wise Previous Questions Chapter 15 Polymers is part of Kerala Plus Two Chemistry Chapter Wise Previous Year Questions and Answers. Here we have given Plus Two Chemistry Chapter Wise Questions and Answers Chapter 15 Polymers.
Kerala Plus Two Chemistry Chapter Wise Previous Questions and Answers Chapter 15 Polymers
What is the crosslinked polymer obtained by the polymerisation of phenol and formaldehyde? [March-2018]
Match the Following:
|b. 1,3-Butadien-Acrylonitrile||ii. Natural Rubber|
|c. Ethyleneglycol-Terephthalic acid||iii. Buna-N|
|d. cis-1,4-polyisoprene||iv. Acrilan|
|b. 1,3-Butadien-Acrylonitrile||ii. Buna-N|
|c. Ethyleneglycol-Terephthalic acid||iii. Terylene|
|d. cis-1,4-polyisoprene||iv. Natural Rubber|
Which of the following is not applicable to Nylon 6, 6?
i. Synthetic polymer
iii. Addition polymer
b. Differentiate between thermoplastics and thermosetting plastics. Write one example each to them. [March-2017]
a.iii. Addition polymer
b. Thermoplastic polymers 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.
Thermosetting polymers These polymers are cross linked or heavily branched molecules, which on heating undergo extensive cross linking in moulds and again become infusible. These cannot be reused. Some common examples are bakelite, urea- formaldelyde resins, etc
Polymers can be classified based on molecular forces.
a. Classify the following polymers into elastomers and fibres: Rubber, Nylon 6, 6, Buna-S, Terylene
b. What do you mean by thermosetting polymers? Give one example. [March-2016]
a. Elastomers: Rubber, Buna-S Fibres: Nylon 6,6, Terylene
b. These are cross-linked or heavily branched molecules. On heating they undergo extensive cross-linking. They cannot be reshaped, eg., bakelite.
Polymers are macro-molecules formed by Union of monomers.
a. Name natural polymer and synthetic polymer.
a. Natural polymer: cellulose, starch Synthetic polymer: PVC, Nylon,
The process by which monomers are converted to polymer is called polymerization.
Ia. Write the names of monomers of the following polymers,
i. (NH – (CH2)6 – NH-CO-(CH2) – CO)n
ii. (CO- (CH2)5 – NH)n
b. Explain the terms co-polymerisation, [Model-2014]
a. i. Hexamethelene diamine & adipic acid
b. Co-polymerisation is an addition polymer of two different monomer, eg.. Buna-S, Buna-N.
a. Synthetic rubber is a vulcanisable rubber like polymer
i. Write one example for synthetic rubber.
ii. Write the method of preparation of the above synthetic rubber
b. Which are the monomers of Nylon – 6 and Nylon-66? [March-2013]
a. i. Neoprene.
ii. By the polymerisation of chloroprene.
b. Nylon-6 – Caprolactum
Nylone-66 – Rexamethylene diamine and adipic acid
a. What are the monomers of the following?
ii. Nylon – 6
b. Write any two differences between step growth polymerisation and chain growth polymerisation. [March-2014]
|Step growth||Chain growth|
|Polymer is formed by repeated codensation of monomer.||Polymer is formed by repeated addition of monomer|
|Small molecules are released during polymerization.||Small molecules are released during released during|
PVC, Bakelite and Polyethene are plastics.
a. Classify the above plastics into thermoplastics and thermosetting plastics.
i. Name the monomer units of PVC and Bakelite. [day-2012]
a. Thermo plastics – PVC, Polyethene Thermosetting plastics – Bakelite.
b. PVC – Vinyl chloride
Bakelite – Phenol and formaldehyde
a. Rubber is a natural polymer obtained from the bark of rubber trees.
i. Name the monomer of natural rubber.
ii. Vulcanisation improves elasticity of rubber. What is vulcanisation ?
b. Write two examples for synthetic rubber. [March-2012]
i. Isoprene or 2-methyl-1, 3-butadiene
ii. The process of heating natural rubber with sulphur at about 373 K to 415 K to improve its physical properties is called vulcanisation of rubber.
a. LDPE is a homopolymer, while Nylon- 66 is a co-polymer. Explain?
b. Classify the following into homopolymers and co-polymers. Nylon-6 and HDPE. [March-2011]
a. If the polymer is formed only one type of monomer units, then it is a homopolymer. LDPE is low density polyethy- lene whose monomer is ethylene. Hence it is a homo-polymer, Nylon-66 is the polymer containing two different monomer units hexamethylene diamine and adipic acid. Hence it is a co-polymer,
b. Nylon-6 : Homopolymer
HDPE : Homopolymer
Based on the mode of polymerisation we can
a. Classify polymers into addition polymers and condensation polymers. Terylene, Polyvinyl chloride, Bakelite,
b. How will you prepare Nylon-66? Terylene, Polyvinylchloride, Bakelite, Polyethene. [March-2010]
a. Addition polymers: Polyvinylchloride (PVC), Polyethene
Condensation polymers : Terylene, Bakelite
b. Nylon-66 is prepared by the condensation of hexamethylene diamine with adipic acid.
Teflon is a commonly used an addition polymer.
a. What is Teflon?
b. Mention any two uses of it?
c. Name two addition polymers.[Say-2009]
a. Teflon is polytetraflouro ethylene.
(CF2– CF2)n ‘
b. It is used in non-stick utensils and in
c. PVC and polystyrene
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