Periodic Table Questions

For the second period elements the correct increasing order of first ionisation enthalpy is:

The correct order of ionic radii is:

Match the oxide given in Column I with its property given in Column II:Column I: (i) ${\text{Na}}_2\text{O}$, (ii) ${\text{Al}}_2{\text{O}}_3$, (iii) ${\text{N}}_2\text{O}$, (iv) ${\text{Cl}}_2{\text{O}}_7$ Column II: (a) Neutral, (b) Basic, (c) Acidic, (d) Amphoteric

What is the correct order of electron gain enthalpy from least negative to most negative for the elements $\text{C, Ca, Al, F,}$ and $\text{O}$?