Which of the following statements is not true in regard to transition elements
They readily form complex compounds
They show variable valency
All their ions are colourless
Their ions contain partially filled $ d -$ electron levels
Mention the type of compounds formed when small atoms like $H$, $C$ and $N$ get trapped inside the crystal lattice of transition metals. Also give physical and chemical characteristics of these compounds.
Which of the following statements are correct about $\mathrm{Zn}, \mathrm{Cd}$ and $\mathrm{Hg}$ ?
$A$. They exhibit high enthalpy of atomization as the d-subshell is full.
$B$. $\mathrm{Zn}$ and $\mathrm{Cd}$ do not show variable oxidation state while $\mathrm{Hg}$ shows $+\mathrm{I}$ and + $II.$
$C$. Compounds of $\mathrm{Zn}, \mathrm{Cd}$ and $\mathrm{Hg}$ are paramagnetic in nature.
$D$. $\mathrm{Zn}, \mathrm{Cd}$ and $\mathrm{Hg}$ are called soft metals.
Choose the most appropriate from the options given below:
The number of unpaired electrons in $M{n^{ + 3}}$ is
Which of the following compounds show colour due to $d-d$ transition?
Most stable compound among the following is