Silver ornaments turn black by atmospheric ?

O_{2}

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N_{2}

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C l_{2}

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H_{2} S

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Solution

The correct option is D $H_{2} S$
Because of corrosion, silver ornaments turn black. This is because of formation of $H_{2} S$ on its surface as the top layer was affected by it.

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C + O_{2} \to C O_{2}

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S T P

H_{2}, N_{2}, O_{2}

H B r

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