The chemical reaction
`2AgCl_("(fused)")+H_(2(g))rarr2HCl_((aq))+2Ag_((s))`
taking place in a galvanic cell is represented by the notation

Options

A. `Pt_((g))|H_(2(g))," bar "|1MKCl_((aq))|AgCl_((x))|Ag_((g))`
B. `Pt_((x))|H_(2(g)),1" bar "|1MHCl_((aq))|1MAg_((aq))^(+)|Ag_((x))`
C. `Pt_((x))|H_(2(g)), 1" bar "|1MHCl_((aq))|AgCl_((g))|Ag_((x))`
D. `Pt_((x))|H_(2(g)),1" bar "|1MHCl_((aq))|Ag_((x))|AgCl_((x))`

Answer

B

Explanation

`2AgCl_((g))+H_(2(g))rarr2HCl_((aq))+2Ag_((x))` The activities of solids and liquids are taken as unity and at low concentrations, the activity of a solute is approximated to its molarity. The cell reaction will be
`Pt_((x))|H_(2(g))1" bar "|H_((aq))^(+)1M]AgCl_((aq))1M|Ag_((g))`