Borax is used as a cleansing agent because on dissolving in water it gives:

What are the correct statements about the elements of group $13$ given below?
$(I)$ The stability of $+1$ oxidation state follows the order $Tl > In > Ga$
$(II)$ Boron has the lowest melting point and boiling point as it is a non-metal
$(III)$ Boron shows a maximum covalency of $4$ in its compounds
$(IV)$ The order of atomic radius is $Ga > Al > In$
$(V)$ Aluminium is passive to concentrated nitric acid

Diborane $(B_2H_6)$ reacts independently with $O_2$ and $H_2O$ to produce,respectively

Diborane reacts with ammonia under different conditions to give a variety of products. Which one among the following is not formed in these reactions?

Which of the following is true for an element in group $13$ of the periodic table?

Boron compounds act as Lewis acids due to .....