An amorphous solid (X) burns in air to form a gas ( Y) which turns lime water milky. This gas decolourises aqueous solution of acidified `KMnO_(4).` Gas (Y) reacts with oxygen to give another gas (Z) which is responsible for acid rain. X, Y and Z are

Options

A. `{:("X","Y","Z"),(C, CO,CO_(2)):}`
B. `{:("X","Y","Z"),(S, SO_(2),SO_(3)):}`
C. `{:("X","Y","Z"),(P, P_(2)O_(3),P_(2)O_(5)):}`
D. `{:("X","Y","Z"),(S, SO_(3),H_(2)SO_(4)):}`

Answer

B

Explanation

`underset((X))S+O_(2)rarrunderset((Y))(SO_(2))`
`underset((Y))(SO_(2))+Ca(OH)_(2)rarrunderset("white ppt.")(CaSO_(3))darr+H_(2)O`
`underset("Puple")(2KMnO_(4))+underset((Y))(5SO_(2))+2H_(2)OrarrK_(2)SO_(4)+underset("Colourless")(2MnSO_(4))+2H_(2)SO_(4)`
`underset((Y))(2SO_(2))+O_(2)rarrunderset((Z))(2SO_(3))`
`underset((Z))(SO_(3))+H_(2)OrarrH_(2)SO_(4)` (responsible for acid rain)