SILVER COMES IN CONTACT WITH AIR IT TURNS BLACKISH IN COLOUR DUE TO--------------FORMED ON SILVER BY THE REACTION WITH HYDROGEN SULPHIDE GAS
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Answer:
Sulpher
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Answer: (a) Silver article turns black when kept in the air because silver article reacts with sulphur compounds such as hydrogen sulphide (H2S) present in air. The phenomenon is called corrosion. For silver particularly, it is called tarnishing of silver.
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