Match the following columns

Answer

(a-p,r);(b-p,r);(c-q);(d-s)

Explanation

`(a)2PbS+3O_(2) to 2PbO+2SO_(2) " " ("Roasting")`
`PbS+PbO_(2) overset(Delta)to 2Pb+SO_(2)`
`" " ("Self-reduction method)"`
`(b )2Cu_(2)S+3O_(2) to 2Cu_(2)O+2SO_(2)("Roasting")`
`Cu_(2)S+2Cu_(2)O overset(Delta)to 6Cu+SO_(2)`
`" "("Self reductioin takes place in Bessemer converter")"
`(c) 2ZnS+3O_(2) to 2ZnO+2SO_(4) " " ("Roasting")`
`ZnO+C overset(Delta)to Zn+CO " "("Carbon reduction")`
Haematite ore is calcined.
`3Fe_(2)O_(3)+CO overset(Delta)to 2Fe_(2)O_(4)+CO_(2)`
`Fe_(2)O_(4)+CO overset(Delta)to 2Fe_(2)O+CO_(2)`
`FeO+CO overset(Delta)to FeO+CO_(2)`