1.

Silverware turns black after a period of time due to formation of

Answer»

nitrate coating on SILVER
SULPHIDE coating on silver
chloride coating on silver
oxide coating on silver

Solution :Silver comes in contact with `H_(2)S` of air and forms silver sulphide which is black in colour.
`2Ag + H_(2)S to Ag_(2)underset("black")(S + ) H_(2)`


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