NCERT Exercise 3.1 — Q13 - Metals and Non-metals
Question: You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice. Explain why these sour substances are effective in cleaning the vessels.
Answer: 1. Copper vessels react slowly with carbon dioxide and moisture in air. 2. This reaction forms a green layer of basic copper carbonate on the vessel surface. 3. This green coating is basic in natur...
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