Which one of the following species has the plane triangular shape?

• N₃

• NO₃^-

• NO₂^-

• NO₂^-

Magnetic moment 2.83 BM is given by which of the following ions?

(At. no.: Ti =22; Cr=24; Mn=25; Ni=28)

• Ti³⁺

• Ni²⁺

• Cr³⁺

• Cr³⁺

Which of the following organic compounds has same hybridization as its combustion product -(CO)₂?

• Ethane

• Ethyne

• Ethene

• Ethene

Bond order of 1.5 is shown by

• O₂⁺

• O₂^-

• O₂^2-

• O₂^2-

Which of the following species contains three bond pairs and one lone pair around the central atoms?

• H₂O

• BF₃

• NH₂^-

• NH₂^-

The pair of species with t he same bond order is 

• O₂^2-, B₂

• O₂⁺, NO⁺

• NO, CO

• NO, CO

Which one of the following pairs is isostructural (i.e., having the same shape and hybridization)?

• [BCl₃ and BrCl₃]

• [NH₃ and NO₃^-]

• [NF₃ and BF₃]

• [NF₃ and BF₃]

During the change of O₂ to O₂^- ion, the electron adds on which one of the following orbitals?

• π* orbital

• π orbital

• σ* orbital

• σ* orbital

Four diatomic species are listed below. Identify the correct order in which the bond order is increasing in them.

• NO< O₂^-<C₂^2- < He₂⁺

•  O₂^- <NO< C₂^2- < He₂⁺

• C₂^2- < He₂⁺ <O₂^- <NO

• C₂^2- < He₂⁺ <O₂^- <NO

Which of the two ions from the list given below have the geometry that is explained by the same hybridization of orbitals