We can observe a black layer over commonly used silver jewelry. The black layer is formed due to formation of ____________.
Answer
Correct Answer : a ) Silver sulphide
Explanation :When Silver get exposed to air, it react with the hydrogen sulfide present in air. It form a black layer in the form of Silver sulphide(Ag2S). Silver sulphide is an insoluble solvent, it is used as photosensitizer in photography.
Ag (s) + H2S (g) → Ag2S (s) + H2 (g)
Hence (a) is the correct answer.
Such type of question is being asked in the exams like SSC CGL, SSC CHSL, RRB NTPC, UPSC CDS, etc.
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