In moist air,$AlCl_3$ fumes because:

Explain the structures of diborane and boric acid.

The reason for boric acid being polymeric is .....

In the following reaction,assign the nature of the product formed by the complete hydrolysis of the underlined atom at $R.T.$:
$H_4\underline{P}_2O_5 + H_2O \longrightarrow \text{Products}$

The number of $P-H$ bond$(s)$ in $H_3PO_2, H_3PO_3$ and $H_3PO_4$,respectively,is

Identify the correct statements about Boron.
$I.$ It has a high melting point.
$II.$ It has a high density.
$III.$ It has high electrical conductivity.
$IV.$ The $^{10}B$ isotope of it has a high ability to absorb neutrons.