Class 11th

4.56. Why N₂ is more stable than O₂? Explain on the basis of molecular orbital theory.

4.55. Which is more polar CO₂ or N₂O? Give reason.

4.54. Why ethyl alcohol is completely miscible with water?

4.53. What is meant by bond pairs of electrons?

4.52. Predict the shapes of the following molecules using VSEPR theory?

(i) BeCl₂

(ii) SiCl₄

4.51. Write the type of hybridisation involved in CH₄, C₂H₄ and C₂H₂.

4.50. Relation between bond order and stability of a molecule:

(a) Lower the bond order, greater is the stability

(b) Not related to each other

(c) Higher the bond order, greater is the stability

(d) None of the above

4.49. Out of the following, intramolecular hydrogen bonding exists in:

(a) Water

(b) H₂S

(c) 4-nitrophenol

(d) 2-nitrophenol

 4.48. Which one is diamagnetic among NO+, NO and NO?

(a) NO⁺  

(b) NO           

(c) NO^–  

(d) None of these

4.47. The axial overlap between the two orbitals leads to the formation of a:

(a) Sigma bond

(b) Pi bond

(c) Multiple Bond

(d) None of these