Question

What is the reason of Silver gets tarnished on exposure to air.

Answer 1

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Background. When silver is exposed to sulfur-containing gases in the air, it discolours and then darkens as it reacts with the gas to form a surface layer of tarnish. This process is called tarnishing, as explained below in The science of silver tarnish and its cause.

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Silver articles when exposed to air become black after sometime. This is because the silver metal reacts with sulphur present in the atmosphere and forms silver sulphide (black colour). The correct option is 'C' because silver react with hydrogen sulphide present in air and formed a black layer of silver sulphide.

Answer 2

Answer:

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