class 10 chapter- Electricity Notes
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KINEMATICS PRACTICE SET-1
KINEMATICS PRACTICE SET-1 ANSWERS
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class 10 chemistry chapter 1 notes
CHAPTER-1 INTRODUCTION 1. Most of the substance around us undergoes various changes.Some of these changes are temporary with no new substance being formed . They are called physical changes . 2. In certain other changes the new substances formed in which the reactant loses its identity to form new substance called product . These changes are permanent as we wan't get the reactant back. CHEMICAL REACTION Chemical reaction process by which two or more substance react with each other to form new substance with different properties. These are the following changes to determine that the chemical reaction has taken place: (i) change in state (ii) change in color (iii) evolution of gas (iv) change in ...
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