Alumina is
Acidic
Basic
Amphoteric
None of these
Which of the following statements about ${H_3}B{O_3}$ is not correct
In the electrolytic method of obtaining aluminium from purified bauxite, cryolite is added to the charge in order to
Explain the following :
$(1)$ Gallium has higher ionisation enthalpy than aluminum.
$(2)$ Boron does not exist as $B^{3+}$ ion.
Write reactions to justify amphoteric nature of aluminium.
Give important trends and anomalous properties of boron.