Write one chemical equation each for the chemical reaction in which the following have taken place : (i) Change in colour (ii) Change in temperature (iii) Formation of precipitate Mention colour change/temperature change (rise/fall)/compound precipitated along with equation.

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CASE_STUDIESDefinition of Chemical ReactionCBSE PYQ3 sub-questions

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A student performs the following experiment in his school laboratory. List two observations to justify that in this experiment a chemical change has taken place.

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What is a chemical reaction ? Describe one activity each to show that a chemical change has occurred in which (i) change of colour, and (ii) change in temperature has taken place.

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