When copper reacts with moist carbon dioxide (CO2) in the air, it forms a green coating of cupric carbonate. Cupric carbonate is a chemical compound with the formula CuCO3. This green coating is commonly known as patina.

Let`s analyze the other options to have a better understanding:

Option 2: Cuprous oxide (Cu2O) is a red or reddish-brown oxide of copper. It is not the compound that forms a green coating when copper reacts with moist carbon dioxide.

Option 3: Cupric oxide (CuO) is a black oxide of copper. It does not form a green coating when copper reacts with moist carbon dioxide.

Option 4: Copper sulphate (CuSO4) is a blue compound. It is not the compound that forms a green coating when copper reacts with moist carbon dioxide.

In conclusion, the correct answer is option 1, cupric carbonate, as it is the compound that forms the green coating when copper reacts with moist carbon dioxide.