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Lemon or tamarind is used for cleaning copper vessels turned greenish.
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  • Copper reacts with carbon dioxide in the air to form copper carbonate.
  • As a result, copper loses its shiny brown surface forming a green layer of copper carbonate.
  • The citric acid present in the lemon or tamarind neutralizes the basis copper carbonate and dissolves the layer.
  • Therefore, greenish copper vessels are cleaned with lemon or tamarind juice to give luster to the surface of the copper vessel.
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