`TI^(3+)//TI` इलेक्ट्रोड का मानक विभव क्या होगा ?
`{:(TI^(3+) + 2e^(+)"," E^(@) = 1.26 V),(TI^(+) + e^(-) rarr TI"," E^(@) = - 0.336 V):}`

Options

A. 0.924 वोल्ट
B. `-0.924` वोल्ट
C. 0.728 वोल्ट
D. `- 0.728` वोल्ट

Answer

B

Explanation

दिया है,
`TI^(3+) + 2e^(-) rarr TI^(+),E^(@) = 126 V" "...(i)`
`TI^(+) + e^(-) rarr TI, E^(@) =- 0.336 V" "...(ii)`
आवश्यक समीकरण
`TI^(3+) + 3e^(-) rarr TI, E^(@) = ? " "...(iii)`
`because" "Delta G^(@) = nFE^(@)`
`therefore" "Delta G_(3)^(@) = Delta G^(@) + Delta G_(2)^(@)`
`-nFE^(@) = [(-nE^(@))_(1) - (nE^(@))_(2)]F`
`-3F^(@) = [-(2 xx 1.26) - (-0.336)]`
`- 3F^(@) = [-2.52 + 0.336]`
`3E^(@) =- 2.184`
`E^(@) =- (2.184)/(3)`
`=- 0.728 V`