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1. |
2) Why the turmeric stain on a cloth becomes reddish while washing with soap ? |
Answer» <p>The copper vessels are tarnished due to the formation of copper oxide due to oxidation of the metal. </p><p>Copper oxide is basic in nature. </p><p>The lemon or tamarind juice contains citric or tartaric acid which reacts with the basic oxide and the neutralization reaction takes place. Due to neutralization, the vessels are cleaned</p> | |