Identify the statement that is not correct as far as structure of diborane is concerned

Write balanced equations for:

$(i)$ $BF _{3}+ LiH \rightarrow$

$(ii)$ $B _{2} H _{6}+ H _{2} O \rightarrow$

$(\text { iii }) NaH + B _{2} H _{6} \rightarrow$

$(i v) H_{3} B O_{3} \stackrel{\Delta}{\longrightarrow}$

$( v ) Al + NaOH \rightarrow$

$( v i ) B _{2} H _{6}+ NH _{3} \rightarrow$

The correct statements from the following are :

$(A)$ The decreasing order of atomic radii of group $13$ elements is $\mathrm{Tl}>\mathrm{In}>\mathrm{Ga}>\mathrm{Al}>\mathrm{B}$.

$(B)$ Down the group $13$ electronegativity decreases from top to bottom.

$(C)$ $\mathrm{Al}$ dissolves in dil. $\mathrm{HCl}$ and liberate $\mathrm{H}_2$ but conc. $\mathrm{HNO}_3$ renders Al passive by forming a protective oxide layer on the surface.

$(D)$ All elements of group 13 exhibits highly stable +1 oxidation state.

$(E)$ Hybridisation of $\mathrm{Al}$ in $\left[\mathrm{Al}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$ ion is $\mathrm{sp}^3 \mathrm{~d}^2$.

Choose the correct answer from the options given below:

Heating an aqueous solution of aluminium chloride to dryness will give:

The incorrect stability order of $+3$ and $+1$ states of $13^{th}$ group elements (boron family) is

The number of $2-$ centre $-2-$ electron and $3-$ centre $-2-$ electron bonds in $B_2H_6$, respectively, are