page 02 Total marks — 25 Attempt ALL questions 1. An element contains covalent bonding and London dispersion forces. The element could be: A boron B neon C sodium D sulfur. 2. The graph below shows the relative quantities of energy equivalent to successive ionisation energies for an element. 6th 4th 5th 3rd 2nd 1st ionisation ionisation energy (kJ mol−1) The most stable ion formed from an atom of this element has a charge of: A 2+ B 3+ C 2− D 3− 3. HCl has a higher boiling point than H2 because: A the polar covalent bonds in HCl are stronger than the covalent bonds in H2 B the polar covalent bonds in HCl are stronger than the van der Waals’ forces in H2 C the van der Waals’ forces in HCl are stronger than the van der Waals’ forces in H2 D the van der Waals’ forces in HCl are stronger than the covalent bonds in H2.