Question

why we clean the vessels of brass and copper with lemon?​

Answer 1

Answer:

Tarnished copper vessels are being cleaned with lemon or tamarind because copper vessel forms a basic layer of copper oxide which is greenish in color and it is cleaned by lemon. ... The tarnish dissolves into the acid and is washed away. The acidic nature of lemon removes the oxidation on the copper vessel.

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Answer 2

$\huge\star\mathfrak\red{{Hey Mate...!!}}$

Ans: 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.