Which of the following cell can produce maximum electrical work?
`["Given" : P_(H_(2))=1 atm, K_(a)(CH_(3)COOH)=K_(b)(NH_(4)OH)=10^(-5)]`

Options

A. `Pt|H_(2)(g)|0.1MNH_(4)Cl(aq.)||0.1MCH_(3)COOH(aq.)|H_(2)(g)|Pt`
B. `Pt|H_(2)(g)|0.1MHNO_(3)(aq.)||0.1MKOH(aq)|H_(2)(g)|Pt`
C. `Pt|H_(2)(g)|0.1MHCl(aq.)||0.1MCH_(3)COOK(aq.)|H_(2)(g)|Pt`
D. `Pt|H_(2)(g)|0.1MCH_(3)COONa(aq.)||0.1MHCl(aq.)|H_(2)(g)|Pt`

Answer

D

Explanation

For maximum electrical work `E_("cell")` = Maximum
`E_("cell") = 0.0591"log" ([H^(+)]_(c))/([H^(+)]_(a))" "[H^(+)]_(c)gt[H^(+)]_(a)`
`therefore` Anodic compartment should be more basic and cathodic compartment should be more acidic.