2020 · Q100
Silver articles turn black when kept in the open for longer time due to the formation of
General KnowledgeChemistry
- AH₂S
- BAgS
- CAgSO₄
- DAg₂S
Explanation
Silver articles blacken because silver reacts with hydrogen sulphide present in the air to form silver sulphide (Ag2S), which is black in colour. H2S is the gas involved in the reaction, not the deposit itself; silver sulphate is not formed. The correct answer is Ag2S.