NCERT Solutions For Class 12 Chemistry Chapter 15: The CBSE Class 12 Chemistry Chapter 15 explains how polymers have completely revolutionized our daily life and the industrial scenario. The significance of this chapter makes it important for the Boards and the entrance examinations. In this article, we will provide you with the NCERT Solutions for Class 12 Chemistry Chapter 15.
Solving the NCERT questions of Class 12 Chemistry Chapter 15 will clear any doubt that you have regarding the topics covered in the chapter. This article will provide you with the completely solved NCERT Solutions for Class 12 Chemistry Chapter 15 by the top faculties at Embibe.
NCERT Solutions For Class 12 Chemistry Chapter 15: Polymers
Before getting into the detailed CBSE Class 12 Chemistry Chapter 15 Solutions for Polymers, let’s have a look at the topics covered in this chapter:
|15.1||Classification of Polymers|
|15.2||Types of Polymerisation Reactions|
|15.3||Molecular Mass of Polymers|
|15.5||Polymers of Commercial Importance|
Now, let’s look at a brief description of Class 12 Chemistry Chapter 15.
CBSE Class 12 Chemistry Chapter 15 – Polymers: Chapter Description
The word ‘polymer’ is coined from two Greek words; ‘poly’ means many and ‘ mer’ means unit or part. The term polymer is defined as huge molecules having high molecular mass. These are also referred to as macromolecules, formed by the joining of repeating structural units on a large scale.
CBSE Class 12 Chemistry Chapter 15 Polymers deals with polymers and their application in different fields. The various applications depend upon their unique mechanical properties like tensile strength, elasticity, toughness, etc. These mechanical properties are governed by intermolecular forces, e.g., Van Der Waals forces and hydrogen bonds present in the polymer. These forces also bind the polymer chains. Therefore, polymers are classified into four sub-groups based on the magnitude of their intermolecular forces.
In CBSE NCERT Class 12 Chemistry Chapter 16, students will further know two broad types of polymerization reactions. The NCERT Class 12 Chemistry Chapter 15 teaches that polymers are the backbone of four major industries viz, plastic, elastomers, fibres, and paints & varnishes.
Download the NCERT Solutions for Class 12 Chemistry Chapter 15 PDF given here and master this chapter.
NCERT Solutions For Class 12 Chemistry Chapter 15 – Polymers
Here we have provided you with the detailed NCERT Solutions for Class 12 Chemistry Chapter 15 PDF. The top academic experts prepare this PDF at Embibe, who have followed all the CBSE guidelines. This will assist you as reference material when you get stuck while solving any question.
We have provided you with some basic questions/answers to highlight our approach to its questions. If these serve you well, then you can go ahead and download the full PDF.
Q: What are natural and synthetic polymers? Give two examples of each type.
A: Polymers that are found in nature are natural polymers. Plants and animals form these polymers. Examples of natural polymers are protein, cellulose, starch, resins, etc.
Synthetic polymers are polymers made by human beings. They are derivatives of natural polymers. Examples of synthetic polymers include plastic (polythene), synthetic fibres (nylon 6, 6), synthetic rubbers (Buna – S).
Q: Define thermoplastics and thermosetting polymers with two examples of each.
A: Thermoplastic polymers are linear (slightly branched) long-chain polymers. These can be repeatedly softened on heating and hardened on cooling. Hence, they can be modified again and again. Moreover, they possess intermolecular forces of attraction whose magnitude is intermediate between elastomers and fibres. Examples of thermoplastics are polythene, polystyrene, polyvinyl etc.
Thermosetting polymers are cross-linked and heavily branched polymers that, on heating, undergo extensive cross-linking in moulds and become infusible. As a result, these polymers cannot be softened again on heating. Examples of thermosetting plastics are bakelite, urea-formaldehyde resins.
Q: Write the monomers used for getting the following polymers: (i) Polyvinyl chloride (ii) Teflon (iii) Bakelite
A: Monomers used for getting the polymers are:
- (i) Vinyl chloride (CH2 = CHCI)
- (ii) Tetrafluoroethylene (CF2 = CF2)
- (iii) Formaldehyde (HCHO) and Phenol (C6H5OH)
How To Prepare For CBSE Class 12 Chemistry Chapter 15
This article on CBSE NCERT Solutions for Class 12 Chemistry Chapter 15 Polymers will be helpful to you in clearing your doubts regarding any of the exercise questions from this chapter. You can refer to the solutions here if you get stuck while solving the questions from your textbook. Make sure you have read the chapter thoroughly and understood all the concepts before attempting the questions.
Embibe provides you with the free Polymers practice questions and Class 12 Chemistry Chapter 15 mock test to boost up your preparation. However, we advise you to finish the NCERT first before moving towards these resources.
|NCERT Solutions for Class 12 Chemistry Chapter 14||Class 12 NCERT Solutions for All Chapters Of Chemistry|
FAQs Related to NCERT Solutions for Class 12 Chemistry Chapter 15 PDF Download
Q. What is the classification of polymers?
A. The most common way of classifying polymers is to separate them into three groups – thermoplastics, thermosets, and elastomers. Thermoplastics can be divided into two types – those that are crystalline and those that are amorphous.
Q. What are the types of polymerization?
A. There are two basic types of polymerization, chain-reaction (or addition) and step-reaction (or condensation) polymerization. One of the most common types of polymer reactions is chain-reaction (addition) polymerization. This type of polymerization is a three-step process involving two chemical entities.
Q. What is the molecular mass of polymers?
A. Molecular Weight. A polymer’s molecular weight is the sum of the atomic weights of individual atoms that comprise a molecule. It indicates the average length of the bulk resin’s polymer chains. All polymer molecules of a particular grade do not have precisely the same molecular weight.
Q.What is meant by biodegradable polymer?
A. Biodegradable polymers are plastics with similar properties to conventional plastics. Still, they can be decomposed and catabolized eventually to carbon dioxide and water by microorganisms and/or enzymes.
Q. What is the importance of polymers?
A. The formation of polymers, long-chain molecules made of repeating units of monomers (the essential building… Organic polymers play a crucial role in living things, providing basic structural materials and participating in vital life processes. For example, the solid parts of all plants are made up of polymers.
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