Silver articles become black on prolonged exposure to air. This is due to the formation of
Ag₃N
Ag₂O
Ag₂S
Ag₂S and Ag₃N

Academic Chemistry NCERT Class 10

Correct answer: (c) Ag2S

Explanation: Silver reacts with hydrogen sulphide in air and forms a black layer of silver sulphide. Therefore, the articles made of silver metal become dark on prolonged exposure to air.

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Updated on: 10-Oct-2022

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