Question

The standard electrode potential for the two electrode `A^(+)//A and B^(+)//B` are respectively 0.5V and 0.75V. The emf of the given cell `A|A^(+)(a=1)||B^(+)(a=1)|` B will be
A. 1.25V
B. `-1.25V`
C. `-0.25V`
D. `0.25V`

Answer 1

Correct Answer - D
`A|overset("anode")(A^(+)(a=1))||overset("cathode")(B^(+)(a=1))|B`
`EMF=E_("cathode")-E_("anode")=0.75-(0.5),EMF=0.25V`