What is the product formed by the action of caustic soda on aluminum hydroxide?

What is the difference between the first member of a group and the other elements in the $s$- and $p$-block? Why?

The Lewis acid nature of $BX_3$ follows the order:

The Lewis acid strength of $BBr_3$,$BCl_3$,and $BF_3$ is in the order:

What is the formula of meta-boric acid?

Identify the correct statements about the anomalous behaviour of Boron:
$I$. Boron trihalides can form dimeric structures.
$II$. Boron shows $+1$ as a stable oxidation state.
$III$. Maximum covalency of Boron is four.
$IV$. Boron does not form $BF_{6}^{3-}$ ion.