Question

why lemon and tamarind is used for cleaning the copper pots or vessels

Answer 1

because of the prsence of acid in them and acid have corrosive nature because of which the acid present in lemon and trement is used for cleaning the copper pots or vessels actually the acid tarnishes the first Black layer of the copper pot



Hope you got that

Answer 2

In tarnished copper vessel there is a  formed due to  which is basic In  and this layer is dissolved in lemon or ram.....due to their acidic nature so these are used in cleaning of copper vessels.