The correct statements among $I$ to $III$ regarding group $13$ element oxides are,
$I$. Boron trioxide is acidic
$II$. Oxides of aluminium and gallium are amphoteric
$III$. Oxides of indium and thallium are basic
$I, II$ and $III$
$II$ and $III$ only
$I$ and $III$ only
$I$ and $II$ only
Boric acid is an acid because its molecule
Explain ionization enthalpy and electro-negativity for elements of Boron family.
The tendency to form monovalent compounds among the Group $13$ elements is correctly exhibited in :
In some of the reactions thallium resembles aluminium, whereas in others it resembles with group $1$ metals. Support this statement by giving some evidences.
Anhydrous $AlC{l_3}$ is obtained from