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

AcademicChemistryNCERTClass 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. 

Updated on 10-Oct-2022 13:27:24