$BCl_3$ and $AlCl_3$ exist in $:-$

Identify the $P$ and $Q$ of the following reaction: $P + Q \longrightarrow [B(OH)_4]^{-} + H_3O^{+}$

Identify the correct statements about $p$-block elements and their compounds.
$(A)$ Non-metals have higher electronegativity than metals.
$(B)$ Non-metals have lower ionisation enthalpy than metals.
$(C)$ Compounds formed between highly reactive non-metals and highly reactive metals are generally ionic.
$(D)$ The non-metal oxides are generally basic in nature.
$(E)$ The metal oxides are generally acidic or neutral in nature.

The correct order of melting points of $Al$,$Ga$,$In$ is

$2BF_3 + 6NaH \xrightarrow{450 \ K} X_{(g)} + 6NaF$. Which of the following statements is \textbf{Incorrect} for $X$?

Statement $I$: Boron does not exhibit allotropy.
Statement $II$: Boron is an extremely hard and black-coloured solid.