STD 12 - 3. Chemical kinetics — NEET STD 11 Science — Question

$Fe^{3+} + e \to Fe^{2+} ;$                   $E^o = 0.771\, volts$

$I_2 + 2e\to 2I^-;$                               $E^o = 0.536\, volts$

$E^o$ cell for the cell reaction

$2Fe^{3+} + 2I^-\to 2Fe^{2+} + I_2$ is

Statement-$I$: Since fluorine is more electronegative than nitrogen, the net dipole moment of $\mathrm{NF}_3$ is greater than $\mathrm{NH}_3$.

Statement-$II$: In $\mathrm{NH}_3$, the orbital dipole due to lone pair and the dipole moment of $\mathrm{NH}$ bonds are in opposite direction, but in $\mathrm{NF}_3$ the orbital dipole due to lone pair and dipole moments of $N-F$ bonds are in same direction.  In the light of the above statements. Choose the most appropriate from the options given below.