Give an example each where change of colour and change of temperature indicates a chemical reaction
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Change in colour:
Reaction between lead nitrate solution and potassium iodide solution.
Pb(NO3)2(aq) +2KI -------> PbI2(s) + 2KNO3(aq)
In this reaction colour changes from colourless to yellow.
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Answer:litmus
Explanation:
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