Chemical Properties of Boron Family

Q. The stability of +1 oxidation state increases in the sequence:

Re-AIPMT 2015

1. $Al<Ga<In<Tl$
2. $In<Tl<Ga<Al$
3. $Tl<In<Ga<Al$
4. $Ga<In<Al<Tl$

Q.

Aluminium vessels should not be washed with materials containing washing soda because:

1. Washing soda is expensive

2. Washing soda reacts with aluminium to form soluble aluminate

3. Washing soda is easily decomposed

4. Washing soda reacts with aluminium to from insoluble aluminium oxide

Q.

$Tl+H_{2}O+O_2\to A$. A is

1. Tl₂O₃

2. Tl(OH)₃

3. 
4. 

Q.

Element M + $N_2$ $\stackrel{H_{2}O}{\to }$ $N{H}_3$ Element M belong to group 13 can be

1. Mg or Al or B

2. B or Al

3. Ga or Al

4. Mg or B

Q. $BN+H_{2}O\to A+B.A\&B$ are as follows

1. H₃BO₃, NH₃

2. B₂O₃, N₂

3. B₂O₃, NH₃

4. H₃BO₃, N₂

Q. Pick out the diamagnetic species

1. B₂Cl₄

2. GaCl₂

3. GaS

4. All of these

Q.

The relative stability of the different oxidation states,

$T{I}^{+}>T{I}^{3+},>G{a}^{3+}>G{a}^{+}T{I}^{+}>I{n}^{+}>G{a}^{+}\text{is because of}$

1. Redox potential

2. Disproportionation

3. Inert pair effect

4. Electron - afinity

Q.

$N_2$ gas is passed or heated Mg and B. Products formed are

1. Mg₃N₂, BN and Mg₃B₂

2. MgN, BN

3. NO Reaction

4. Mg₃N₂, BN

Q.

An aqueous solution of potash alum is -

1. Acidic

2. Alkaline

3. Neutral

4. None of these

Q.

Concentrated aqueous sodium hydroxide can separate mixture of

1. Al³⁺ and Fe³⁺

2. Al³⁺ and Sn²⁺

3. Zn³⁺ and Pb²⁺

4. Al³⁺ and Zn³⁺