In the following reaction $2x + B_2H_6 \rightarrow [BH_2x_2]^+ [BH_4]^-$,$x$ is

Inorganic benzene is

Identify the correct statements from the following :
$I$. $Ga_2O_3$ is an amphoteric oxide.
$II$. The dimer of aluminium chloride has three $Al-Cl-Al$ bridge bonds.
$III$. Boron is a very hard refractory solid of high melting temperature.

Which of the following statements about $H_3BO_3$ is not correct?

The alloy formed from aluminum is ............ .

$B(OH)_3 + NaOH \rightleftharpoons NaBO_2 + Na[B(OH)_4] + H_2O$
How can this reaction be made to proceed in the forward direction?