1.

Write the following in the form of balanced chemical equations:- (a) Calcium carbonate decomposes on heating to form calcium oxide and carbon – di – oxide. (b) When ammonium hydroxide is added to a solvent of iron (ll) Sulphate, a green ppt of iron (ll) hydroxide and ammonium Sulphate are formed. (c) When a nail of iron is added to a solution of copper Sulphate, iron (ll) Sulphate and copper metal are formed. (d) Zinc reacts with dil hydrochloric acid to form zinc chloride and hydrogen gas is liberated.

Answer»

a. CaCO3 = CaO + CO2

b. 2NH4OH + FeSO4 = Fe(OH)2 + (NH4)2SO4

c. Fe + CuSO4 = FeSO4 + Cu

d. Zn + 2HCl = ZnCl2 + H2



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