Aluminium chloride in acidified aqueous solution forms a complex 'A'. The formula of A and hybridisation state of Al in 'A' is respectively-

1. [Al(H₂O)₆]³⁺, sp³d²

2. [Al(H₂O)₄]³⁺, sp³

3. [Al(H2O)4]3+, dsp2

4. [Al(H₂O)]³⁺, d²sp³

The correct order of atomic radii among the group 13 elements is-

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

AlF₃ is soluble in HF only in the presence of KF due to the formation of-

1.  ${\mathrm{K}}_3\left({\mathrm{AIF}}_3{\mathrm{H}}_3\right)$
2.  ${\mathrm{K}}_3\left({\mathrm{AIF}}_6\right)$
3.  ${\mathrm{AIH}}_3$
4.  $\mathrm{K}\left({\mathrm{AIF}}_3\mathrm{H}\right)$

The stability of +1 oxidation state among Al, Ga, In and Tl increases in the sequence
1. Ga<ln<Al<Tl
2. Al<Ga<ln<Tl
3. Tl<ln<Ga<Al
4. ln<Tl<Ga<Al

Which of the following statements is incorrect?

1. NaHCO₃ on heating gives Na₂CO₃
2. Pure sodium metal dissolves in liquid ammonia to give a blue solution.
3. NaOH reacts with glass to give sodium silicate
4. Aluminium reacts with excess NaOH to give Al(OH)₃

The stability of +1 oxidation state increases in the sequence

1. Al <Ga<In<Tl

2. Tl<In<Ga<Al

3. In<Tl<Ga<Al

4. Ga<In<Al<Tl

Incorrect statement among the following about zeolites is:-

1. They have an open structure which enables them to take up small molecules.

2. Zeolites are aluminosilicates having a three-dimensional network.

3. Some of the ${\mathrm{SiO}}_4^{4-}$ units are replaced by ${\mathrm{AlO}}_4^{5-}\text{ and }{\mathrm{AlO}}_6^{9-}$ ions in zeolites.

4. They are used as cation exchangers.

In Borax bead test which compound is formed : 

1. Orthoborate

2. Metaborate

3. Double oxide

4. Tetraborate