Read the following question and answer:
A shiny metal 'X', when kept in the open, reacts slowly with sulphur compounds in the air to form a black coating 'Y'.
i. Identify 'X' and 'Y'.
ii. Write the balanced chemical equation.
iii. Name the process involved.
i. Identify 'X' and 'Y'.
ii. Write the balanced chemical equation.
iii. Name the process involved.
i. 'X' is and 'Y' is .
ii. The balanced chemical equation is.
iii. The process is called as.