A copper vessel exposed to moist air for along time is shown in figure I and sulphur powder is burnt in oxygen as shown in figure II.

1,2,3 and 4 are respectivley.

Options

A. `CuO,CO_(2),SO_(2),H_(2)SO_(3)`
B. `CuCO_(3),Cu(OH)_(2),H_(2)SO_(3),SO_(2)`
C. `Cu,CuO,H_(2)S,H_(2)SO_(4)`
D. `Cu(OH)_(2),CuCO_(3),SO_(2),H_(2)SO_(3)`

Answer

D

Explanation

`underset("Copper")(2Cu)+underset("moist air")ubrace(H_(2)O+CO_(2)+O_(2))tounderset("Green coating (basic in nature, turns red litmus paper into blue)")ubrace(Cu underset((1))(OH_(2))+underset((2))(CuCO_(3)))`
`underset("Sulphur")(S)+underset("Oxygen")(O_(2)) to underset("Sulphur dioxide (3)")(SO_(2))`
`underset("Sulphur dioxide (3)")(SO_(2))+underset("Water")(H_(2)O) to underset("Sulphurous acid (acidic in nature, turns blue litmus paper into red) (4)")(H_(2)SO_(3))`