English Medium Notes of 9th class Chemistry chapter 7 and 8

Unit 7 Oxidation is addition of oxygen or removal of hydrogen or loss of electrons by an element and as a result oxidation number increases. Reduction is addition of hydrogen or removal of oxygen or gain of electrons by an element and as a result oxidation number decreases. Oxidation number is the apparent charge on […]
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Chapter 6 notes of 9th class chemistry

Solution is a homogeneous mixture of two or more substances. Aqueous solution is formed by dissolving substances in water. The component which is lesser in quantity is called solute and the component in greater quantity is called solvent. A solution containing less amount of solute than that is required to saturate it at a given […]
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