Complete the following equations
(i) `PbS(s) +H_(2)O_(2) (aq) to `
(ii)`CO(g) + 2H_(2) (g) underset("catalyst")overset("cobalt")to`

Explanation

(i) When PbS react with hydrogen peroxide, then `PbSO_(4)` and water are found.
`PbS(s) + 4H_(2)O_(2)(aq) to PbSO_(4) + 4H_(2)O`
When carbon mono-oxide reacts with hydrogen, in the presence of cobalt catalyst, then methanol is formed .
`CO(g) + 2H_(2)(g)underset("Catalyst")overset("Cobalt")to CH_(3)OH(l)`