We observe black coating (silver oxide) on silver articles when left open in surroundings.This is because of the

process called _____________.

Corrosion

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Reduction

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Decompositon

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Oxidation

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Solution

The correct option is A
Corrosion

Corrosion is the gradual destruction of materials by chemical reaction with their environment. Due to corrosion, black coating of silver oxide is formed on surface of silver articles due to presence of hydrogen sulphide in atmosphere. This is also called as trashing of silver.

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