CBSE Class 12 Chapter 6 general principles and isolation
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Class 12 Chemistry
Class 12 Chapter 16 Chemistry in Everyday Life
INTRODUCTION The principles of chemistry have been used for the benefit of mankind. Think of cleanliness — all the materials like soaps, detergents, household bleaches, toothpaste, etc. will come to your mind: all these are products of chemistry. Take a look at the beautiful clothes — immediately chemicals of the synthetic fibres used for
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Class 12 Chapter 15 Polymers
INTRODUCTION The word ‘polymer’ is composed of two Greek words: poly means many and mer means units or parts. Polymers are very large molecules with high molecular mass (103 -107u). These are also referred to as macromolecules, which are formed by the joining of repeating structural units on a very large scale. The repeating
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Class 12 Chapter 14 Biomolecules
INTRODUCTION The main feature of a living system is that it grows, sustains and reproduces itself. The most amazing thing about a living system is that it also comprises non-living atoms and molecules. The detailed knowledge of chemical reactions taking place within a living system falls in the domain of biochemistry. Living systems are
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Class 12 Chapter 13 Amines
INTRODUCTION Amines form an important class of organic compounds which are derived by replacing one or more hydrogen atoms of ammonia molecules by alkyl/aryl group(s). In nature, they are found among proteins, vitamins, alkaloids and hormones. Synthetic examples include polymers, dyestuffs and drugs. Adrenaline and Ephedrine, are two biologically active compounds, both of which
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