Question

When a copper is exposed to air for a long time it acquires a green coat. Because
it reacts with
​

Answer 1

Copper metal when exposed to air turns green in colour due to corrosion. When copper vessel is exposed to air in rainy season, the metal reacts with gases and moisture and atmospheric gases to form a mixture of copper carbonate and copper hydroxide.

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$\huge \pink{✿} \red {C} \green {u} \blue {t} \orange {e} \pink {/} \red {Q} \blue {u} \pink {e} \red {e} \green {n} \pink {♡}$

Answer 2

Explanation:

WHEN A COPPER OBJECT REMAINS IN DAMP SIR FOR A CONSIDERABLE TIME,THEN COPPER REACTS SLOWLY WITH THE CARBON DIOXIDE AND WATER VAPOURS OF AIR TO FORM A GREEN COATING OF BASIC COPPER CARBONATE ON THE SURFACE OF THE OBJECT.