CBSE Class 12 Chemistry Polymers Assignment. Students are advised to refer to the attached assignments and practise them regularly. This will help them to identify their weak areas and will help them to score better in examination. Parents should download and give the assignments to their children for practice.
Level-1:Questions
1) What are polymers?
Ans: These are referred to as Macromolecules which are formed by joining of repeating structural units on a large scale.
2) Give two examples each of natural and of synthetic polymers.
Ans: Natural polymers e.g.:- proteins, starch
Synthetic polymers e.g.:- Polythene, Nylon-6,6
3) What are biodegradeable polymers? Give one example.
Ans: Polymers which are degraded easily by environmental processes.
e.g.: PHBV
4) How are the polymer classified on the basis of structure?
Ans: They are three types based on the structure of polymers
a) Linear polymers
b) branched polymers
c) cross linked polymers.
5) Define the term ‘polymerisation’.
Ans: The process of making polymer from monomers.
6) What are the monomers for the following polymers:
i) Polythene
ii) PVC
iii) Teflon
iv) Polystyrene
Ans: i) Ethene
ii) Vinyl chloride
iii) Tetrafluoroethene
iv)Styrene
7) In which classes, the polymers are classified on the basis of molecular forces?
Ans: Elastomers, Fibres, thermoplastic and thermosetting polymers
8) Give an example of elastomer.
Ans: Neoprene
9) Identify the polymer.
-A-A-A-A-AA:
Homopolymer
10)Define the term ” homopolymerisation”.
Ans:The process of making polymer by adding one kind of monomers
11) Identify the polymer.
-A-B-A-B-A-B-A-BA:
Copolymer
1β) →hy rubbers are called “Elastomers”?
Ans:They can be stretched and retract to its original position after the release of force.
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