Which of the following statements are correct about $Zn,\,Cd$ and $Hg$ ?
$(I)$ they exhibit high enthalpies of atomisation as the $d-$ subshell is full
$(II)$ $zn$ and $Cd$ do not show variable oxidation states while $Hg$ shows $+ I$ and $+ II$
$(III)$ Compound of $Zn,\,Cd$ and $Hg$, are paramagnetic in nature
$(IV)$ $Zn,\,Cd$ and $Hg$ are called soft metals
$I,\,II,\,III$
$I,\,III$
$II,\,IV$
$IV$ only
The transition element that has lowest enthalpy of atomisation is
If spin only magnetic moment of $VCl_X$ is $1.73\,BM$ then correct formula is
When $Cu^{2+}$ ion is treated with $KI$, a white precipitate is formed. Explain the reaction with the help of chemical equation.
'Spin only' magnetic moment is same for which of the following ions?
$A$. $\mathrm{Ti}^{3+}$ $B$. $\mathrm{Cr}^{2+}$ $C$. $\mathrm{Mn}^{2+}$ $D$.$\mathrm{Fe}^{2+}$ $E$. $\mathrm{Sc}^{3+}$
Choose the most appropriate answer from the options given below.