The number of water molecules present in borax,kernite and bauxite respectively are

In which of the following molecules is a hydrogen bridge bond present?

When $AlCl_3 \cdot 6H_2O$ is strongly heated,then it forms

Give the uses of $Al$ and its compounds.

Which one of the following oxides dissolves in both hydrochloric acid and sodium hydroxide?

The correct formula of borax is $Na_2[B_4O_5(OH)_4] \cdot 8H_2O$. If the formula is represented as $Na_2[B_4O_5(OH)_x] \cdot yH_2O$, then the sum of $x$ and $y$ is: