a student has been collecting silver coins and copper coins after some days when she took out the coin to count object a black counting on Silver coins and green coating on copper coins when a chemical phenomenon is responsible for such accounting write the chemical reaction involved.
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this is the question of chemistry but still i m answering.
Both coins get reacted with air
Ag +H2S = Ag2S + H2
Cu + co2 + H2O = CuCO3.Cu (OH)2
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3
Answer:
Ag + H2S = Ag2S + H2.
Cu + CO2 + H2O = CuCO3.Cu(OH)2.
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