Chemical Bonding and Molecular Structure

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

4.46. A co-ordinate bond is formed by:

(a) Sharing of electrons contributed by both the atoms

(b) Complete transfer of electrons

(c) Sharing of electrons contributed by one atom only

(d) None of these

4.46. A co-ordinate bond is formed by:

(a) Sharing of electrons contributed by both the atoms

(b) Complete transfer of electrons

(c) Sharing of electrons contributed by one atom only

(d) None of these