Class 11 Chapter 8 Redox Reactions
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Class 11 Chemistry
Class 11 Chapter 3 Classification of elements and periodicity in properties
In 1800 only 31 elements were known. By 1865 the number of elements identified were more than 63. At present 118 elements are known. With such a large number of elements, it is very difficult to study each element individually. To make it easy scientists proposed a systematic way to organise the elements. Content Why
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Class 11 Chapter 2 Structure of Atom
The existence of atoms was proposed since 400 B.C. approximately. According to the early Indian and Greek philosophers atoms are the fundamental particle of matter. ‘Atom’ is derived from the Greek word a-tomio which means not divisible further. In 1808 the atomic theory was propounded by John Dalton, which described the law of conservation of
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CLASS 11 Chapter 1 Some Basic Concepts of Chemistry
Class XI Chapter 1 Some Basic Concepts of Chemistry Chemistry is the scientific study of the properties and behaviour of matter. It is the science of molecules and their transformation. It is an important part of our life. The formation of curd from milk, rusting of iron, and the formation of vinegar from sugarcane juice
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