Complete and balance the following chemical reactions :
i) `PbS_((s))+H_(2)O_(2(aq))to`
ii) `MnO_(4(aq))^(-)+H_(2)O_(2(aq))to`
iii) `CaO_((s))+H_(2)O_((g))to`
iv) `Ca_(3)N_(2(s))+H_(2)O_((l))to`
Classify the above into a) hydrolysis b) redox and c) hydration reactions.

Explanation

i) `underset(("black"))(PbS_((s)))+H_(2)O_(2(aq))tounderset(("white")["Hydration reaction"])(PbsO_(4(s))+4H_(2)O_((l)))`
ii) `2MnO_(4(aq))^(-)+3H_(2)O_(2)to2MnO_(2)+underset("[Redox reaction]")(3O_(2)+2H_(2)O+2OH^(Ө))`
iii) `CaO_((s))+H_(2)O_((g))toCa(OH)_(2)`
iv) `Ca_(3)N_(2)+6H_(2)Oto3Ca(OH)_(2)+2NH_(3)`
(iii) and (iv) reactions are hydrolysis reactions