write the two observations during chemical reaction along with chemical equation
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change in temperature. eg; calcium oxide reacts vigorously with water to produce calcium hydroxide along with evolution of large amount of heat. 2) evolution of gas. eg; Zn reacts with H2so4 to form ZnSO4 and H2.
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MARK AS BRAINLIEST
A chemical reaction is usually accompanied by easily observed physical effects, such as the emission of heat and light, the formation of a precipitate, the evolution of gas, or a color change.
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1) change in temperature. eg; calcium oxide reacts vigorously with water to produce calcium hydroxide along with evolution of large amount of heat. 2) evolution of gas. eg; Zn reacts with H2so4 to form ZnSO4 and H2.
Explanation:
MARK AS BRAINLIEST
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