You have collected some silver coins. After few days observe a black coating on silver coins.On rubbing with toothpaste the silver coins regain the shine. (b) Write the chemical name and formula of the black coating.
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din the correct me if I'm wrong in a
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lkjlajgla.fnkl
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You have collected some silver coins. After few days observe a black coating on silver coins.On rubbing with toothpaste the silver coins regain the shine. (b) Write the chemical name and formula of the black coating.
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