We can observe a black layer over commonly used silver jewelry. The black layer is formed due to formation of ____________.
Correct Answer : a ) Silver sulphideExplanation :
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.
Read Daily Current Affairs, Banking Awareness, Hindi Current Affairs, Word of the Day, Study Material for GK, Study Material for Quant and attempt free mock tests at PendulumEdu and boost your preparation for the actual exam.
SSC Online Coaching | SSC CGL Online Classes | SSC CHSL Online Coaching | SSC CPO Coaching Classes | SSC MTS Classes OnlineRead More