1. Which of the following is a linear molecule?

2. Molecules are held together in a crystal by

3.  Sp³d² hybridization is present in [Co(NH₃)₆³⁺], find its geometry

4. Maximum bond angle is present in case of

5.  MX₆ is a molecule with octahedral geometry. How many X – M – X bonds are at 180°?

6. Hydrogen bonding is not present in

7. The maximum number of hydrogen bonds that a molecule of water can have is

8. Which of the following pairs of molecules will have a permanent dipole moment for both members?

9. Amongst H₂O, H₂S, H₂Se and H₂Te the one with the highest boiling point is

10. The structure of IF₇ is

11. Which one of the following molecules will form a linear polymeric structure due to hydrogen bonding?

12. The outer orbitals of C in ethene molecule can be considered to be hybridized to give three equivalent sp² orbitals. The total number of sigma (s) and pi (p) bonds in ethene molecule is

13. Based on lattice enthalpy and other considerations which one the following alkali metals chlorides is expected to have the higher melting point?

14. Dipole-induced dipole interactions are present in which of the following pairs?

15. C-O bond length is minimum in

16. The species having pyramidal shape is

17. The number of types of bonds between two carbon atoms in calcium carbide is

18. The formal charge and P-O bond order in PO₄^3- respectively are

19. Number of π bonds in Naphthalene is

20. Among the following mixtures, dipole-dipole as the major interaction, is present in