1.
A silver article generally turns black when kept in the open for a few days. The article rubbed with toothpaste
again starts shining.
a) Explain the phenomenon involved in this process. b) Write the chemical reaction involved in this process.
Balance Hachemical reactions and state the tune of chemical reactions
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Answer:a)Silver metals develop a black layer of silver sulphide and reacts with hydrogen sulphide present in atmosphere.For help equation-
Ag+H₂S⇒Ag₂S+H₂
The phenomenon involved is corrosion of silver metal.
b)Silver sulphide(Ag₂S) is the black substance formed
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