Write the half reaction for the following redox reaction
`(a) 2Fe^(3+)(aq)+2I^(-)(aq)rarr2Fe^(2+)(aq)+I_(2)(aq)`
`(b) Zn(s)+2H^(+)(aq)rarrZn^(2+)(aq)+H_(2)(g)`
(iii) `Al(s)+3Ag^(+)rarrAl^(+3)(aq)+3Ag(s)`

Explanation

`{:((a) 2I^(-)(aq) to I_(2)(aq) +2e^(-)),(ul(Fe^(3+)(aq)+e^(-) to Fe^(2+)(aq)"]"xx2)),(2Fe^(3+) (aq)+2I^(-)(aq)to2Fe^(2+)(aq)+I_(2)(aq)),((b)Zn(s)toZn^(2+)(aq)+2e^(-)),(ul(2H^(+)(q)+2e^(-)toH_(2)(g))),(Zn(s)+2H^(+)(aq)toZn^(2+)(aq)+H_(2)(g)),((c)Al(s)to Al^(3+)(aq)+3e^(-)),(ul(Ag^(+)(aq)+e^(-) to Ag(s)"]"xx3)),(Al(s)+3Ag^(+)(aq) to Al^(3+)(aq)+3Ag(s)):}`