CBSE Class 12 Chemistry Polymers Notes and Questions

CBSE Class 12 Chemistry Polymers Notes and Questions. Based on CBSE and NCERT guidelines. The students should practice these Questions to gain perfection which will help him to get more marks in CBSE examination.The preparation should be in a manner which helps the students to concentrate more in areas which carry more marks.


1. Polymer: GIST
It is a very large molecule having molecular mass 103 - 107 g mol-1. They are formed by joining together repeating structural units.
2. Classification of Polymers:
(a) Based On Source:
(i) Natural: Found in plants and animals, e.g. Proteins, cellulose, natural rubber, silk, wool.
(ii) Synthetic: Man-made e.g. Nylon, polyster, neoprene, Bakelite, Teflon, PVC, polystyrene.
(b) Based On Structure:
(i) Linear Polymers: this consist of long and straight chain repeating units e.g. Polythene (HDPE), PVC,nylon, polyester.
(ii) Branched Polymers: This contain linear chains having some branches e.g. amylopectin, glycogen etc.
(iii) Cross Linked Polymers: Strong covalent bonds are present between various linear polymer chains.
E.g. Bakelite, urea- formaldehyde polymer, melamine, formaldehyde polymer etc.
(c) Based On Mode Of Polymerization:
(i) Addition Polymers: These are formed by the repeated addition of monomer molecules possessing multiple bonds, e.g., polythene, polypropene, polystyrene, PMMA (polymethyl metha crylate)
(ii) Condensation Polymers: These are formed by the repeated condensation reaction of different bifunctional or trifunctional monomers, with the elimination of small molecules like water,HCL,NH3,alcohol etc. e.g. Bakelite,nylon,polyster,urea- formaldehyde resin.
(d) Based On Molecular Forces:
(i) Elastomers: Forces of interaction between polymer chains is weakest, e.g. natural rubber, neoprene,vulcanized rubber.
(ii) Fibers: Strong hydrogen bonds are present between the polymer chains. They have high tensile strength e.g., nylon.polyster, silk, wool, orlon, rayon etc.
(iii) Thermoplastics: They are linear/slightly branched chains molecules capable of repeated softening on heating and hardening on cooling,e.g., polythene,PVC, polystrene, polypropene.
(iv) Thermosetting Plastics: They are cross-linked or heavily branched molecules, which on heating undergo extensive cross-linkages and become infusible, e.g., bakelite,urea formaldehyde resin.

Please click on below link to download pdf file for CBSE Class 12 Chemistry Polymers Notes and Questions



Click to View or Download pdf file
Click for more Chemistry Study Material

Latest NCERT & CBSE News

Read the latest news and announcements from NCERT and CBSE below. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning

Training Programme on the Alternative Academic Calendar

In view of the extraordinary situation prevailing in the world due to COVID-19 pandemic, the CBSE Board had announced the ‘Revised Academic Curriculum for classes 9- 12 for the session 2020-21’. The reduced topics will not be part of the internal assessment or for the...

CBSE Reduced Syllabus Class 9 and 10

The prevailing health emergency in the country and at different parts of the world as well as the efforts to contain the spread of Covid-19 pandemic has resulted in loss of class room teaching due to closure of schools. Therefore the CBSE Board has decided to revise...

Board Exams helpline by CBSE

According to the recent announcement of CBSE, the pending Class 10 and 12 Board exams are going to be held from 01 July to 15 July 2020 in India. Along with this, it has also been decided to resume the free of cost tele-counseling service for students from 9.30 am to 5...

Re verification of Class 12 Board Exams Marks

Modalities and Schedule for Senior Secondary School (Class XII) Examinations, 2020 in the subjects whose examinations have been conducted by CBSE for the processes of (I) Verification of Marks (II) Obtaining Photocopy of the Evaluated Answer Book(s) (Ill) Re-evaluation...

Board Cancelled Official CBSE Statement

Keeping in view the requests received from various State Governments and the changed circumstances as on date, following has been decided- 1. Examinations for classes X and XII which were scheduled from 1st July to 15th, 2020 stand cancelled. 2. Assessment of the...

Studies Today