Important Compounds of Group 13 Elements

Which salt does not give the borax bead test?

Which of the following is formed when borax is heated strongly.

Three centre- two electron bonds exist in:

A molecular adduct is formed between ${\mathrm{BF}}_3$ and ${\mathrm{Et}}_2\mathrm{O}.$ Which of the following values describe the coordination number$\left(\mathrm{CN}\right)$, valency $\left(\mathrm{V}\right)$and oxidation state $\left(\mathrm{OS}\right)$of $\mathrm{B}$ atom in this adduct?

The banana bond in diborane is formed by

The bonding in diborane can be described by:

${\mathrm{BF}}_3$ is planar and electron deficient compound. Hybridization and number of electrons around the central atom, respectively are:

The tendency of $\mathrm{X}$ in ${\mathrm{BX}}_3 \left(\mathrm{X}=\mathrm{F}, \mathrm{Cl}, \mathrm{OMe}, {\mathrm{NMe}}_2\right)$ to form a $\pi$-bond with boron follows the order

An unknown inorganic compound $\text{'}\mathrm{A}\text{'}$ on reduction with ${\mathrm{LiAlH}}_4$ produced a hydride product $\text{'}\mathrm{B}\text{'}$ (along with other by-products). The product $\text{'}\mathrm{B}\text{'}$ contains $21.72\%$ of hydrogen in it. The product $\text{'}\mathrm{B}\text{'}$ on exposure to air gave boron trioxide. The compounds $\text{'}\mathrm{A}\text{'}$ and $\text{'}\mathrm{B}\text{'}$ are:

With reference to diborane $\left({\mathrm{B}}_2{\mathrm{H}}_6\right),$ identify the correct statement. 

A Lewis acid $\text{'}\mathrm{X}\text{'}$ reacts with ${\mathrm{LiAlH}}_4$ in ether medium to give a highly toxic gas. This gas when heated with ${\mathrm{NH}}_3$ gives a compound commonly known as inorganic benzene. The gas is

${\mathrm{H}}_3{\mathrm{BO}}_3$ is :

${\mathrm{B}}_2{\mathrm{H}}_6$ can't be prepared by :-

The bond dissociation energy of $\mathrm{B}-\mathrm{F}$ in ${\mathrm{BF}}_3$ is $646 \mathrm{kJ} {\mathrm{mol}}^{-1}$ whereas that of $\mathrm{C}-\mathrm{F}$ in ${\mathrm{CF}}_4$ is $515 \mathrm{kJ} {\mathrm{mol}}^{-1}$. The correct reason for higher $\mathrm{B}-\mathrm{F}$ bond dissociation energy as compared to that of $\mathrm{C}-\mathrm{F}$ is:-

Which of the following is/are correct?

Which is correct for diborane :-

Borax on heating with cobalt oxide forms a blue bead of