Which of the following Group 13 elements cannot form the hexafluoro complex ion [MF₆]³⁻?

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

Select the correct order of atomic radii for the elements of Group 13.

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

Which of the following pairs contain species that are not isostructural?

Which of the following represents the correct increasing order of stability of the +1 oxidation state among Al, Ga, In, and Tl?

1. Ga < ln < Al < Tl
2. Al < Ga < ln < Tl
3. Tl < ln < Ga < Al
4. ln < Tl < Ga < Al

Which of the following compounds has a structure similar to graphite?

1. B
2. B₄C
3. B₂H₆
4. BN

Which of the following is not a monomer for a high molecular mass silicone polymer?

The basic structural unit of silicates is:

1. (SiO₄)^4–

2. (SiO₃)^2–

3. (SiO₄)^2–

4. (SiO)

Which of the following is least likely to act as a Lewis base?

Al₂O₃ can be converted to anhydrous AlCl₃ by heating:

1. $A{l}_2{O}_3$ $with$ $HCl$ $gas$

2. $A{l}_2{O}_3$ $$with NaCl in solid-state

3. a mixture of $A{l}_2{O}_3$ $$ and carbon in dry $C{l}_2$ gas

4. $A{l}_2{O}_3$ $$ with $C{l}_2$ gas

Which of the following statements is incorrect?

1.  SnF₄ is ionic in nature.

2.  PbF₄ is covalent in nature.

3.  SiCl₄ is easily hydrolysed.

4.  GeX₄ (X = F, Cl, Br, I) is more stable than GeX₂