What is produced upon the hydrolysis of $AlCl_3$?

Which of the following properties describes the diagonal relationship between boron and silicon?

Inorganic graphite is

Consider the compounds,$BCl_3$ and $CCl_4$. How will they behave with water? Justify.

Boric acid,$H_3BO_3$,is a/an ....

Boron trifluoride on reaction with lithium aluminium hydride in ether gives $LiF$, $AlF_3$ and $X$. $X$ on reaction with $NH_3$ gives $Y$. $Y$ on further heating gives a compound $Z$. The number of $\sigma$-bonds and $\pi$-bonds in $Z$ are $x$ and $y$ respectively. $(x+y)$ is equal to