What is the rxn when change in state, change in colour,evolution of gas,change in temperature
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Change in state: 2H₂(g) + O₂ (g) ---> 2H₂O(l)
Change in colour: Fe + CuSO₄ ---> FeSO₄ + Cu , where CuSO₄ was a blue solution, after reaction the solution turned pale green.
Evolution of gas: CO₂ + heat ---> C + O₂
Change in temperature: CaO + H₂O ---> Ca(OH)₂
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