When borax is dissolved in water, the product formed is

Give reasons: Aluminium alloys are used to make aircraft bodies.

Which of the following statements is incorrect?

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

The Lewis acid strength of $BBr_3$,$BCl_3$,and $BF_3$ is in the order:

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.