Correct statement for $3d-$ series is
$Sc$ shows stable $+ 3$ oxidation state
$Zn$ has maximum $I.E.$
Metallic radius of $Mn > Fe$
All are correct
In which pair of ions both are diamagnetic in nature?
The ${E^\Theta }\,\left( {{M^{2 + }}/M} \right)$ value for copper is positive $(+0.34 \,V ) .$ What is possible reason for this? (Hint: consider its high $\Delta_{ a } H^{\theta}$ and low $\Delta_{ hyd } H^{\theta}$ )
Which of the following $3 d -m e t a l$ ion will give the lowest enthalpy of hydration $(\Delta_{ hyd } H )$ when dissolved in water?
The solubility of silver bromide in hypo solution is due to the formation of :
For $M ^{2+} / M$ and $M ^{3+} / M ^{2+}$ systems, the ${E^\Theta }$ values for some metals are as follows:
$Cr ^{2+} / Cr \,-0.9 \,V$
$Cr ^{3} / Cr ^{2+}\,-0.4 \,V$
$Mn ^{2+} / Mn \,-1.2\, V$
$Mn ^{3+} / Mn ^{2+}\,+1.5 \,V$
$Fe ^{2+} / Fe\, -0.4 \,V$
$Fe ^{3+} / Fe ^{2+}\,+0.8\, V$
Use this data to comment upon:
$(i)$ The stability of $Fe ^{3+}$ in acid solution as compared to that of $Cr ^{3+}$ or $Mn ^{3+}$ and
$(ii)$ The ease with which iron can be oxidised as compared to a similar process for either chromium or manganese metal.