The chemical name of borax is

When orthoboric acid $({H_3}B{O_3})$ is heated, the residue left is

Colour of the bead in borax bead test is mainly due to the formation of

Give physical and chemical properties of Orthoboric acid $(H_3BO_3)$.

Identify the correct statement for $B _{2} H _{6}$ from those given below.

$(A)$ In $B _{2} H _{6}$, all $B - H$ bonds are equivalent.

$(B)$ In $B _{2} H _{6}$ there are four $3-$centre$-2-$electron bonds.

$(C)$ $B _{2} H _{6}$ is a Lewis acid.

$(D)$ $B _{2} H _{6}$ can be synthesized form both $BF _{3}$ and $NaBH _{4}$.

$(E)$ $B _{2} H _{6}$ is a planar molecule.

Choose the most appropriate answer from the options given below..... .

In the extraction of aluminium the electrolyte is