When borax is dissolved in water, the product formed is

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

Which of the following is a true alum?

The number of acidic protons in $H_{3}PO_{3}$ is:

On adding ammonium hydroxide solution to $Al_2(SO_4)_3$ (aq) :

Two students were given the task to prepare an adduct $NH_3 \to BH_3$ at low temperature :-
Student $I$ :- She mixed $B_2H_6$ and $NH_3$
Student $II$ :- He mixed $B_2H_6$ with $THF$ followed by addition of $NH_3$
Which student is expected to get the $CORRECT$ final product?