Upon hetaing with `Cu_(2)S` the regants that give copper metel are
(i) `CuFeS_(2)` (ii) `CuO`
(iii) `Cu_(2)O`(iv) `CuSO_(4)`

Options

A. `(ii),(iii),(iv)
B. (ii),(iii)
C. (i),(ii),(iii),(iv)
D. (ii),(iv)

Answer

a

Explanation

(i) `2CuFeS_(2) + O_(2) rarr Cu_(2)S + 2FeS + SO_(2)`
(ii) ` 4CaO rarr 2Cu_(2)O + O_(2)`
`2Cu_(2)O + Cu_(2)S rarr 6Cu + SO_(2)`
(iii) ` Cu_(2)SO_(4) rarr CaO + SO_(2)`
(iv) `CuSO_(4) + rarr CaO + SO_(2) + (1)/(2) O_(3)`
`4CuO rarr 2Cu_(2)O + O_(2)`
`2Cu_(2)O + CuS rarr 6Cu + SO_(2)`