How the following conversions are made?
(a). Copper chloride from copper nitrate.
(b). Cuprous oxide from copper sulphate.
(c). Cuprous oxide from copper.

Explanation

`Cu(NO_3)_2+2NaOHtounderset(ppt.)(Cu(OH)_2)+2NaNO_3`
`Cu(OH)_2+2HCitoCuCl_2+2H_2O`
(b). `CuSO_4+2NaOHtounderset(ppt.)(Cu(OH)_2)+Na_2SO_4`
`Cu(OH)_2underset(heated)overset(strongly)toCuO+H_2O`
`CuO+Cuoverset(heat)toCu_2O`
or `CuSO_4to` Fehling['s solution
`C_6H_(12)O+6+` fehling's soln. `Cu_2O+C_6H_(12)O_7`
(c) `Cu+4HNO_3(conc.)toCu(NO_3)_2+2NO_2+2H_2O`
`2Cu(NO_3)_2overset(heat)to2CuO+2CuO+4NO_2+O_2`
`CuO+Cuoverset(heat)toCu_2O`