Silver artefacts get tarnished in air due to the formation of

Silver artefacts get tarnished in air due to the formation of

[amp_mcq option1=”silver chloride” option2=”silver oxide” option3=”silver sulphide” option4=”silver sulphate” correct=”option3″]

This question was previously asked in
UPSC NDA-2 – 2022
Silver artefacts get tarnished in air due to the formation of silver sulphide.
Silver tarnishes when it reacts with sulfur compounds present in the air, such as hydrogen sulfide (H2S). This reaction forms a black layer of silver sulfide (Ag2S) on the surface of the silver.
The reaction is 2Ag(s) + H2S(g) -> Ag2S(s) + H2(g). Tarnishing is accelerated in polluted air or environments with higher concentrations of sulfur gases.