The species in which the N atom is in a state of sp hybridization is:

• NO₂^-

• NO₃^-

• NO₂
  

• NO₂
  

The ionic radii (in Å) of N^3–, O^2– and F^– are respectively:

• 1.36, 1.40 and 1.71

• 1.36, 1.71 and 1.40

• 1.71, 1.40 and 1.36

• 1.71, 1.40 and 1.36

3.

In which of the following pairs of molecules/ions, both the species are not likely exist?

• 
• 
• 
• 

Which of the following exists as covalent crystals in the solid state?

• Iodine

• Silicon

• Sulphur

• Sulphur

Stability of the species Li₂, Li₂⁻ and Li₂⁺ increases in the order of:

• Li₂ < Li₂⁺ < Li₂^-

• Li₂⁻ < Li₂⁺ < Li₂ 

• Li₂< Li₂⁻ < Li₂⁺

• Li₂< Li₂⁻ < Li₂⁺

In which of the following pairs the two species are not isostructural?

• CO₃^2- and NO₃^-

• PCl⁺₄ and SiCl₄

• PF₅ and BrF₅

• PF₅ and BrF₅

Among the following, the maximum covalent character is shown by the compound

• FeCl₂

• SnCl₂

• AlCl₃

• AlCl₃

The hybridization of orbitals of N atom in NO₃-, NO₂⁺ and NH₄⁺ are respectively

• sp, sp²,sp³

• sp₂ , sp, sp

• sp, sp³ , sp²

• sp, sp³ , sp²

The group having isoelectronic species is

• O^2– , F^–, Na⁺ , Mg²⁺

• O– , F^–, Na, Mg⁺

• O^2–, F^–, Na ,Mg²⁺

• O^2–, F^–, Na ,Mg²⁺

Using MO theory predict which of the following species has the shortest bond length?

• O₂²⁺

• O₂⁺

• O₂⁻

• O₂⁻