write short notes on chemical reaction and equation . I will mark that
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A chemical reaction is described by a chemical equation, an expression that gives the identities and quantities of the substances involved in a reaction. A chemical equation shows the starting compound(s)—the reactants—on the left and the final compound(s)—the products—on the right, separated by an arrow.
=Chemical reaction is the 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 colour
(iii) Evolution of gas
(iv) Change in temperature
→ A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and formulae, wherein the reactant entities are given on the left-hand side and the product entities on the right-hand side.
Magnesium + oxygen → magnesium oxide
(Reactant) → (Product)
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