Important Compounds of Group 13 Elements

Which of the following statement is not correct about diborane?

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:

$$\begin{gathered} {\mathrm{BCl}}_3+{\mathrm{LiAlH}}_4\to \mathrm{A}+\mathrm{LiCl}+{\mathrm{AlCl}}_3 \\ \mathrm{A}+{\mathrm{H}}_2\mathrm{O}\to \mathrm{B}+{\mathrm{H}}_2 \end{gathered}$$

In this reaction sequence $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$ compounds respectively are

In the compound ${\mathrm{Na}}_2\left[{\mathrm{B}}_4{\mathrm{O}}_5(\mathrm{OH}{)}_4\right]·8{\mathrm{H}}_2\mathrm{O},$ if the

(i) number of $\mathrm{B}-\mathrm{O}-\mathrm{B}$ bonds are $\mathrm{x}$

(ii) number of $\mathrm{B}-\mathrm{B}$ bonds are $\mathrm{y}$

(iii) number of ${\mathrm{sp}}^2$ hybridized $\mathrm{B}$ atoms are $\mathrm{z}$

Calculate the value of $\mathrm{x}+\mathrm{y}+\mathrm{z}$.

How many number of the following substances contains hexagonal planar rings in their structures?

Graphite, $(\mathrm{BN}{)}_{\mathrm{x}}, {\mathrm{B}}_3{\mathrm{N}}_3{\mathrm{H}}_6, {\mathrm{C}}_6{\mathrm{H}}_6$, ${\mathrm{B}}_2{\mathrm{H}}_6, {\mathrm{H}}_3{\mathrm{P}}_3{\mathrm{O}}_9$

Two moles of sodium borohydride is treated with two moles of orthophosphoric acid. The total number of moles of gaseous products formed in the reaction is:

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. 

Borax reacts with concentrated $\mathrm{HCl}$ to produce a boron containing compound $\mathrm{X}$. Heating $\mathrm{X}$ with ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$ converts it into $\mathrm{Y}$, which gives green edged flame. Identify $\mathrm{X}$ and $\mathrm{Y}$.

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