Question

give one example each of a chemical reaction characterise by evolution of gas change in colour change in state change formation of precipitate change in temperature​

Answer 1

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Answer 2

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Evolution of gas- Zinc and sulphuric acid reaction

Change in state - burning of wax Formation of precipitate - Chemical reaction of lead and phosphorus

Change in temperature - reaction of sulphuric acid and granules of zinc

change in colour - Reaction of Citric acid and potassium permagnate.

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