Chemical Properties of Group 13 Elements

Group-$13$ elements react with ${\mathrm{O}}_2$ in amorphous form to form oxides of type ${\mathrm{M}}_2{\mathrm{O}}_3$ ($\mathrm{M}=$ element). Which among the following is the most basic oxide?

Which of the following is most basic?

Which of the following metallic oxides exhibit amphoteric nature?

Why boron exhibit anomalous behaviour? Give some such properties in which it differ from rest of the members of the group. Also give the similarities between $\mathrm{B}$ and $\mathrm{Si}$.

Write short note on the following, 

Halides of elements of group-$13$.

The correct decreasing order of stabilities of $+3$ oxidation state of group-$13$ elements is:

Which metal dissolves in $\mathrm{NaOH}$:

Which of the following statement is wrong?

Which of the following is wrongly matched?

${\mathrm{AlF}}_3$ is soluble in $\mathrm{HF}$ only in the presence of $\mathrm{KF}$. It is due to the formation of 

Which of the following statements is incorrect?

Concentrated ${\mathrm{HNO}}_3$ is stored in containers made up of

For ${\mathrm{BCl}}_3, {\mathrm{AlCl}}_3$and ${\mathrm{GaCl}}_3$ the increasing order of ionic character is

Predict the correct shape of ${\mathrm{BH}}_4^{-}$.

Thallium shows different oxidation state because _____.

Which of the following statements is incorrect?

Which of the following is correct, related to change in aluminium oxide?

In Borax analyse these given statement and find the value of $\mathrm{x}+\mathrm{y}+\mathrm{z}$

(i) Number of B-O-B bond is $\mathrm{x}$

(ii) Number of B-B bond is $\mathrm{y}$

(iii) Number of ${\mathrm{sp}}^2$ hybridized B atom is $\mathrm{z}$

 

Among the following, how many statements are CORRECT?

(i) $\mathrm{CaCN}{}_2$ on treating with steam gives ${\mathrm{NH}}_3.$

(ii) ${\mathrm{S}}_2{\mathrm{O}}_8^{2-}$ is a better oxidant than ${\mathrm{SO}}_4^{2-}$.

(iii) ${\mathrm{BrF}}_3$ is a better oxidant than fluorine.

(iv) When ${\mathrm{XeF}}_4$ reacts with ${\mathrm{BF}}_3$ the 's' character of hybrid orbitals of 'Xe' decreases.

(v) HF is more volatile than $\mathrm{HCl}$ .

(vi) ${\mathrm{ClO}}_4^{-}$ is a better oxidant than ${\mathrm{ClO}}^{-}.$

(vii) ${\mathrm{F}}_2$ absorbs shorter wavelength than ${\mathrm{I}}_2$ from visible light

(viii) all $\mathrm{\prime }\mathrm{Cl}-\mathrm{O}\mathrm{\prime }$ bond lengths in ${\mathrm{Cl}}_2{\mathrm{O}}_7$ are same.

The maximum covalency of Boron is ____.