Question

When a copper is exposed to air for a long time it acquires a green coat. Because it reacts with A. sulphur C. moist oxygen B. nitrogen D. moist carbondioxide​

Answer 1

Answer:

Moist Oxygen..

Explanation:

hope it'll help you

Answer 2

Answer:

c. moist oxygen

Explanation:

when copper is exposed to air so the air contains oxygen so the answer is MOIST OXYGEN