a silver object turns black when kept in pen for a long time. why?

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Solution

Dear Student,
It is because, the silver undergo corrosion and gets converted into silver oxide.

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a silver object turns black when kept in pen for a long time. why?

Dear Student,It is because, the silver undergo corrosion and gets converted into silver oxide.

Dear Student,
It is because, the silver undergo corrosion and gets converted into silver oxide.