Chemistry, asked by priya0594sharma, 5 days ago

give two observations in an activity which may suggest that a chemical reaction has taken place. give examples to illustrate your ans

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Answered by ArpitChauhan1501

0

change in temperature. eg; calcium oxide reacts vigorously with water to produce calcium hydroxide along with evolution of large amount of heat.
evolution of gas. eg; Zn reacts with H2so4 to form ZnSO4 and H2.

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