Which of the following produce an alkaline solution when dissolved in water?
$(i)$ Borax
$(ii)$ Potash alum
$(iii)$ $SO_2$
$(iv)$ $SO_2(OH)_2$

Diborane reacts with $HCl$ in the presence of $AlCl_3$ and liberates:

Identify the correct statement for $B_2H_6$ from those given below.
$(A)$ In $B_2H_6$,all $B-H$ bonds are equivalent.
$(B)$ In $B_2H_6$ there are four $3$-centre-$2$-electron bonds.
$(C)$ $B_2H_6$ is a Lewis acid.
$(D)$ $B_2H_6$ can be synthesized from both $BF_3$ and $NaBH_4$.
$(E)$ $B_2H_6$ is a planar molecule.
Choose the most appropriate answer from the options given below.

The correct order of atomic radii of group $13$ elements is

What are the freezing and boiling points of ammonia $(NH_3)$?

Draw the structure of boric acid showing hydrogen bonding. Which species is present in water? What is the hybridization of boron in this species?