Which reactions can be used to prepare diborane
$I.\,\,NaBH_4 + BF_3$ (in ether) $\to $
$II.\,\, NaBH_4 + I_2 \to $
$III.\,\, BF_3 + NaH \to $
A compound $(A)$ of boron reacts with $NMe_3$ to give an adduct $(B)$ which on hydrolysis gives a compound $(C) $ and hydrogen gas. Compound $(C)$ is an acid. Identify the compounds $A, B$ and $C.$ Give the reactions involved.
The most acidic of the following compounds is
Colour of the bead in borax bead test is mainly due to the formation of
$Be ( OH )_2$ react with $Sr ( OH )_2$ to yield an ionic salt. Choose the incorrect option related to this reaction from the following: