Question

solve this problem

Simplify the following ​

Answer 1

♦♦♦Give two example for each of the following reaction in which♦♦♦

★Precipitate is formed

• AgNO3(aqueous) + NaCl(aqueous) —- AgCl↓ + NaNO3 (aqueous)
• Mg(OH)2(s) + 2HCl (aqueous) ———MgCl2(aqueous) + 2H2O(l)

★heat is liberated

• when coal is burnt in oxygen, carbondioxide is produced and heat is liberated.....C+O2---------CO2+heat
• slaked lime is prepared by adding water to quick lime. in this reaction also heat is give out........CaO(s) + H2O (l) → Ca(OH)2(s

★colour is changed

• Blue to green CuSO4 + Fe --> FeSO4 + Cu · 2)
• Green to colourless - Fe( OH)2 + Zn --> Zn(OH)2

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