Question

you must have seen tarnished copper vessels being cleaned with lemon or tamarind juice.

explain why the source of energy are effective in cleaning the vessels.

Answer 1

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ANSWER ➡

as we know that the copper articles get tarnished due to formation of basic copper carbonate .

the sour items like lemon and tamarind juice contains acid.

these acids can clean the tarnished copper by neutralising them.

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Answer 2

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Copper reacts with moist carbon dioxide in air to form copper carbonate and as a result, copper vessel loses its shiny brown surface forming a green layer of copper carbonate. The citric acid present in the lemon or tamarind neutralises the basis copper carbonate and dissolves the layer. That is why, tarnished copper vessels are cleaned with lemon or tamarind juice to give the surface of the copper vessel its characteristic lustre.