For which one of the following elements,the $M^{3+} / M^{2+}$ standard electrode potential is more positive?

The highest magnetic moment is shown by the transition metal ion with the outer electronic configuration

The incorrect relationship in the following pairs in relation to ionisation enthalpies is $:$

Which among the following elements has the lowest density and is the lightest?

Which of the following statements are correct about $Zn, Cd$ and $Hg$?
$A$. They exhibit high enthalpy of atomization as the d-subshell is full.
$B$. $Zn$ and $Cd$ do not show variable oxidation state while $Hg$ shows $+I$ and $+II$.
$C$. Compounds of $Zn, Cd$ and $Hg$ are paramagnetic in nature.
$D$. $Zn, Cd$ and $Hg$ are called soft metals.
Choose the most appropriate from the options given below:

Based on the given outer electronic configurations,which element will exhibit the highest oxidation state?