For the cell prepared from electrode A and B, electrode A:`(Cr_2O_7^(2-))/(Cr^(3+)), E_("red")^(0)=+1.33V` and electrode B :`(Fe^(3+))/(Fe^(2+)), E_("red")^(0)=0.77 V`, which of the following statement is not correct ?

Options

A. The electrons will flow B to A (in the outer circuit) when connections are made.
B. The standard e.m.f. of the cell with be 0.56 V
C. A will be positive electrode
D. None of the above

Answer

D

Explanation

A acts as cathode and B acts as anode because reduction potential of A is more.
Anode is B `implies` is negative electrode.
`implies` electrons flow from B to A .
`implies` e.m.f=(1.33-0.77) V