Alumina $(Al_2O_3)$ is:

Give the uses of $Al$ and its compounds.

Which of the following compounds does not produce an oxyacid of the central atom upon hydrolysis?

In a molecule of pyrophosphoric acid $(H_4P_2O_7)$,the number of $P-OH$,$P=O$ and $P-O-P$ bonds/moiety(ies) respectively are:

The correct statement$(s)$ about $B_2H_6$ is/are:

Observe the following reactions (not balanced):
$BF_3 + LiAlH_4 \xrightarrow{(C_2H_5)_2O} X + LiF + AlF_3$
$X + NaH \longrightarrow Y$
The incorrect statement about $Y$ is: