Polymers — Chemistry STD 12 Science — Question

(Atomic No. $Y = 39$, $La = 57$, $Eu = 63$, $Lu = 71$)

$Zn ^{2+}+2 e ^{-} \rightarrow Zn ; E ^{\circ}=-0.760 \,V$

$Ag _{2} O + H _{2} O +2 e ^{-} \rightarrow 2 Ag +2 OH ^{-} ; E ^{\circ}=0.344 \,V$

If $F$ is $96,500 C mol ^{-1}$ $\Delta G ^{\circ}$ of the cell will be $....$ (In $kJ mol ^{-1}$)

$(I)$ both the complexes can be high spin

$(II)$ $Ni(II)$ complex can very rarely be low spin.

$(III)$ with strong field ligands, $Mn(II)$ complexes can be low spin.

$(IV)$ aqueous solution of $Mn ( II )$ ions is yellow in color.