Group 13

The electronegativity of a group 13 element 'E' is same as that of Ge (on Pauling scale and upto one decimal point). The CORRECT statements about $\ce{E^{3+}}$ are

A. It can act as a reducing agent.

B. It can act as an oxidizing agent.

C. $\ce{E^{3+}}$ is more stable than $\ce{E+}$.

D. The standard electrode potential value for $\ce{E^{3+}}$/E is positive.

Choose the correct answer from the options given below:

Given below are two statements :

Statement I: Aluminium upon reaction with NaOH forms $\ce{[Al(OH)6]^3-}$ ion.

Statement II: The geometry of $\ce{ICl4-}$, $\ce{ClO3-}$ and $\ce{IBr2-}$ is square planar, pyramidal and linear respectively.

In the light of the above statements, choose the correct answer from the options given below :

Given below are two statements:

Statement I: Aluminium is more electropositive than thallium as the standard electrode potential value of $E^\circ_{\ce{Al^3+}/\ce{Al}}$ is negative and $E^\circ_{\ce{Tl^3+}/\ce{Tl}}$ is positive.

Statement II: The sum of first three ionization enthalpies of boron is very high when compared to that of aluminium. Due to this reason boron forms covalent compounds only and aluminium forms $\ce{Al^3+}$ ion.

In the light of the above statements, choose the correct answer from the options given below

The compound(s) which react(s) with $\ce{NH3}$ to give boron nitride (BN) is(are)

Identify the correct statement for $\mathrm{B_2H_6}$ from those given below.

(A) In $\mathrm{B_2H_6}$, all B-H bonds are equivalent.

(B) In $\mathrm{B_2H_6}$, there are four 3-centre-2-electron bonds.

(C) $\mathrm{B_2H_6}$ is a Lewis acid.

(D) $\mathrm{B_2H_6}$ can be synthesized from both $\mathrm{BF_3}$ and $\mathrm{NaBH_4}$.

(E) $\mathrm{B_2H_6}$ is a planar molecule.

Choose the most appropriate answer from the options given below :

Number of electron deficient molecules among the following $\mathrm{PH_3}$, $\mathrm{B_2H_6}$, $\mathrm{CCl_4}$, $\mathrm{NH_3}$, LiH and $\mathrm{BCl_3}$ is

Choose the correct stability order of group 13 elements in their +1 oxidation state.

Match List - I with List - II.

Choose the most appropriate answer from the options given below :

Aqueous solution of which of the following boron compounds will be strongly basic in nature?

The metal that has very low melting point and its periodic position is closer to a metalloid is

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: Boric acid is a weak acid.

Reason R: Boric acid is not able to release $\mathrm{H^+}$ ion on its own. It receives $\mathrm{OH^-}$ ion from water and releases $\mathrm{H^+}$ ion.

In the light of the above statements, choose the most appropriate answer from the options given below.

Given below are two statements.

Statement I: The chlorides of Be and Al have Cl-bridged structure. Both are soluble in organic solvents and act as Lewis bases.

Statement II: Hydroxides of Be and Al dissolve in excess alkali to give beryllate and aluminate ions.

In the light of the above statements, choose the correct answer from the options given below.

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Boron is unable to form $\mathrm{BF_6^{3-}}$.

Reason (R) : Size of B is very small.

In the light of the above statements, choose the correct answer from the options given below :

Among the following, the correct statement(s) is(are)

Consider the following standard electrode potentials (E° in volts) in aqueous solution :

Element	$\ce{M^3+/M}$	$\ce{M+/M}$
Al	−1.66	+0.55
Tl	+1.26	−0.34

Based on these data, which of the following statements is correct ?

The increasing order of atomic radii of the following Group 13 elements is

The crystalline form of borax has

Three moles of $\ce{B2H6}$ are completely reacted with methanol. The number of moles of boron containing product formed is

The correct statement(s) for orthoboric acid is/are

In the following sets of reactants which two sets best exhibit the amphoteric character of $\ce{Al2O3.xH2O}$ ?

Set 1 : $\ce{Al2O3.xH2O(s)}$ and $\ce{OH-(aq)}$

Set 2 : $\ce{Al2O3.xH2O(s)}$ and $\ce{H2O(l)}$

Set 3 : $\ce{Al2O3.xH2O(s)}$ and $\ce{H+(aq)}$

Set 4 : $\ce{Al2O3.xH2O(s)}$ and $\ce{NH3(aq)}$