The basic nature of the hydroxides of group 13 increases down the group

All the Al−Cl bonds in Al₂Cl₆ are equivalent

Boron resembles more with silicon than its own family members

Aluminium is a powerful reducing agent

It exists as a dimeric Al₂Cl₆

Two different Al−Cl bond lengths are known

Its aqueous solution is basic

It fumes in moist air

B(OH)₃

Al(OH)₃

Ga(OH)₃

In(OH)₃

H₃PO₄, H₃PO₃

H₃PO₃, H₄P₂O₇

H₃PO₃, H₃PO₂

H₃PO₂, HPO₃

H₂SiCl₆, SiO₂

H₄SiO₄, Si

SiO₂, Si

H₄SiO₄, SiO₂