दिए गये सेल का वि.वा. बल होगा
`Pt|H_(2)(P_(1))|H_((aq))^(+)||H_(2)(P_(2))|Pt`

Options

A. `(RT)/f"In"(P_(1))/(P_(2))`
B. `(RT)/(2f)"In"(P_(1))/(P_(2))`
C. `(RT)/f"In"(P_(2))/(P_(1))`
D. इनमें से कोई नहीं

Answer

B

Explanation

एनोड अभिक्रिया `H_(2)(P_(1))to2H^(+)`
कैथोड अभिक्रिया `2H^(+)toH_(2)(P_(2))`
`E_("कैथोड")=-(RT)/(2F)"In"(P_(2))/([H^(+)]^(2))’E_("एनोड")=-(RT)/(2F)"In"([H^(+)]^(2))/(P_(1))`
`E_("अंत")=E_("एनोड")+E_("कैथोड")=-(RT)/(2R)"In"((H^(+))^(2))/(P_(1))-(RT)/(2F)"In"(P_(2))/((H^(+))^(2))`
`=-(RT)/(2F)"In"(P_(2))/(P_(1))=(RT)/(2F)"In"(P_(1))/(P_(2))`