PCl₅ is highly unstable and in a solid-state, it exists as into  [PCl₄]⁺ and [PCl₆]^- ions.

The geometry of [PCl₆]^- is   

1. Octahedral

2. Tetrahedral

3. Square pyramidal

4. Square planar

Which of the following species has maximum number of lone-pair of electrons on the central atom ?

1. XeF₂

2. H₃O⁺

3. XeF₄

4. XeF₆

Which is the least polarizable gas among the following?

Correct statement among the following regarding the shape of  HgCl₂, SnCl₂ and F₂O is:

Which of the following compounds does not exhibit hydrogen bonding?

1.	CH3CH2OH	2.
3.		4.

Which of the following statement is not correct from the view point of molecular orbital theory ?

1. Be₂ is not a stable molecule

2. He₂ is not a stable but He_2⁺ is expected to exist.

3. Bond strength of N₂ is maximum amongst the homonuclear diatomic molecules belonging to the second period.

4. The order of energies of molecular orbitals in N₂ molecule is

 s2s < s*2s < s2p_z < (p2p_x=p2p_y) < (p*2p_x=p*2p_y) < s*2p_z  

The types of hybrid orbitals of nitrogen in NO₂⁺, NO₃^- and NH₄⁺ respectively are expected to be

1. sp, sp³ and sp²

2. sp, sp² and sp³

3. sp², sp and sp³

4. sp², sp³ and sp

AsF₅ molecule is trigonal bipyramidal. The hybrid orbitals used by As-atoms for bonding are

1. $d_{x^2-y^2}, d_{z^2}, s, p_x, p_y$

2. $d_{xy}, s,p_x, p_y, p_z$

3. $s, p_x, p_y, p_z, d_{xy}$

4. $d_{z^2}, s, p_x, p_y, p_z$

Equilateral shape has

1. sp hybridisation

2. sp² hybridisation

3. sp³ hybridisation

4. dsp² hybridisation

In an octahedral structure, the pair of d orbitals involved in d²sp³-hybridisation is:

1. $d_{x^2-y^2}, d_{z^2}$

2. $d_{xy}, d_{x^2\mathit{-}{y}^{\mathit{2}}}$

3. $d_{{\mathrm{z}}^2}, d_{xz}$

4. $d_{xy}, d_{yz}$