CBSE Class 12 Chapter 6 general principles and isolation
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Class 12 Chapter 6 General Principles and Processes of Isolation of Elements
CLASS XII CHAPTER 6 General Principles and isolation INTRODUCTION We have archaeological evidence of the use of different metals since ancient times. Evidence shows that different metals were used in different parts of the country. For example, Harappans used gold, silver and their alloys for making ornaments etc. Recent excavation by the archaeological department
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CLASS 10 CHAPTER 3 – Metal and Non- Metals
Elements are classified as Metals and Non-Metals based on their physical and chemical properties. A comparative study of their physical properties is as follows: Chemical Properties of Metals The metal reacts with air or oxygen to form metal oxide. For example, Copper reacts with oxygen to form Copper Oxide.
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