Chemistry
Give a balanced chemical equation for the following :
(i) Exothermic reaction that is also a combination reaction.
(ii) A decomposition reaction involving salt of zinc.
(iii) A double decomposition reaction where a white precipitate is formed.
Chemical Reaction
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Answer
(i) When carbon burns in oxygen to form carbon dioxide, lot of heat is produced. It is also a combination reaction.
C + O2 ↑ ⟶ CO2 ↑ + Heat
(ii) Zinc carbonate decomposes to form zinc oxide and releases carbon dioxide gas.
ZnCO3 ZnO + CO2 ↑
(iii) Formation of white precipitate of silver chloride on mixing sodium chloride solution and silver nitrate solution is a double decomposition reaction.
AgNO3 + NaCl ⟶ AgCl ↓ + NaNO3
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