For the cell prepared from electrode A and B- electrode A- Cr2O2-7-Cr3- E0red-1-33V and electrode B- Fe3-Fe2- E0red-0-77V- which of the following statement is not correct-

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Gibb's Free Energy

For the cell ...

Question

For the cell prepared from electrode $A$ and $B$ , electrode $A :$ $\frac{C r_{2} O_{7}^{2 -}}{C r^{3 +}}$ , $E_{r e d}^{0} = + 1.33$ V and electrode $B :$ $\frac{F e^{3 +}}{F e^{2 +}}$ , $E_{r e d}^{0} = 0.77$ V, which of the following statement is not correct?

The electrons will flow from

B

A

(in the outer circuit) when connections are made.

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The standard e.m.f. of the cell will be

0.56

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A

will be positive electrode

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Current flows from B to A in external circuit.

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Solution

The correct option is D Current flows from B to A in external circuit.
(A) The electrons will flow from B to A when
connection are made.
This statement is wrong because electrons will move
from A to B as electrons move from higher potential
$+ 1.33 V$ to the lower potential $0.77 V .$

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For the cell prepared from electrode A and B, electrode A: Cr2O2−7Cr3+, E0red=+1.33V and electrode B: Fe3+Fe2+, E0red=0.77V, which of the following statement is not correct?

The correct option is D Current flows from B to A in external circuit.(A) The electrons will flow from B to A whenconnection are made.This statement is wrong because electrons will movefrom A to B as electrons move from higher potential+1.33V to the lower potential 0.77V.

For the cell prepared from electrode $A$ and $B$ , electrode $A :$ $\frac{C r_{2} O_{7}^{2 -}}{C r^{3 +}}$ , $E_{r e d}^{0} = + 1.33$ V and electrode $B :$ $\frac{F e^{3 +}}{F e^{2 +}}$ , $E_{r e d}^{0} = 0.77$ V, which of the following statement is not correct?

The correct option is D Current flows from B to A in external circuit.
(A) The electrons will flow from B to A when
connection are made.
This statement is wrong because electrons will move
from A to B as electrons move from higher potential
$+ 1.33 V$ to the lower potential $0.77 V .$