Go through the following question and provide the answer:
 
A metal 'X', on long exposure to moist air containing carbon dioxide, forms a green layer 'Y'.
i. Identify 'X' and 'Y'.
ii. Write the balanced chemical equation.
iii. Name of the green layer formed.
 
i. 'X' is and 'Y' is .
 
ii. The balanced chemical equation is.
 
iii. The green layer is called as.