The coating formed on the metals such as iron | vedclass

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Question

(C) Corrosion is the process where metals are eaten away by the action of air, moisture, or chemicals.$1$. Iron $(Fe)$ reacts with oxygen and moisture

Vedclass · Accepted Answer

Brown, black and green in colour.

Vedclass · Answer

(C) Corrosion is the process where metals are eaten away by the action of air, moisture, or chemicals.$1$. Iron $(Fe)$ reacts with oxygen and moisture to form hydrated iron$(III)$ oxide $(Fe_2O_3 \cdot xH_2O)$, which is brown in colour (rust).$2$. Silver $(Ag)$ reacts with sulfur compounds in the air to form silver sulfide $(Ag_2S)$, which is black in colour (tarnish).$3$. Copper $(Cu)$ reacts with moist carbon dioxide in the air to form a green coating of basic copper carbonate $(CuCO_3 \cdot Cu(OH)_2)$.Therefore, the order of colours for iron, silver, and copper is brown, black, and green respectively.

The coating formed on the metals such as iron, silver, and copper after corrosion will be:

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