What are the geometry and magnetic behaviors of the complex [ Ni ( CO)_4]?

Which of the following is the most electronegative element?

Out of the following complex compounds, which of the compound will be having the minimum conductance in solution?

Match List-I with List-II $\begin{array}{|l|l|l|l|}\hline & \text{List - I} & & \text{List - II} \\\hline \text{A}. & \text{Haber process} & \text{(i)} & \text {Fe catalyst} \\\hline \text{B.} & \text{Wacker oxidation} & \text{(ii)} & \mathrm{PdCl}_2 \\\hline \text{C.} & \text{Wilkinson catalyst} & \text{(iii)} & \left[\left(\mathrm{PPh}_3\right)_3 \mathrm{RhCl}\right] \\\hline \text{D.} & \text{Ziegler catalyst} & \text{(iv)} & \mathrm{TiCl}_4 \text{ with } \mathrm{Al}\left(\mathrm{CH}_3\right)_3 \\\hline\end{array}$ Choose the correct answer from the options given below :

Identify the correct orders against the property mentioned (A) $\mathrm{H}_2 \mathrm{O}\gt\mathrm{NH}_3\gt\mathrm{CHCl}_3$ - dipole moment (B) $\mathrm{XeF}_4\gt\mathrm{XeO}_3\gt\mathrm{XeF}_2-$ number of lone pairs on central atom (C) $\mathrm{O}-\mathrm{H}\gt\mathrm{C}-\mathrm{H}\gt\mathrm{N}-\mathrm{O}-$ bond length (D) $\mathrm{N}_2\gt\mathrm{O}_2\gt\mathrm{H}_2$ - bond enthalpy Choose the correct answer from the options given below :

Match List - I with List - II $\begin{array}{llll} & \text{List-I} & & \text{List-II} \\A. & \mathrm{XeO}_3 & I. & \mathrm{sp}^3 \mathrm{~d}, \text{linear} \\B. & \mathrm{XeF}_2 & II. & \mathrm{sp}^3 ; \text{pyramidal} \\C. & \mathrm{XeOF}_4 & III. & \mathrm{sp}^3 \mathrm{~d}^3 ; \text{distorted octahedral} \\D. & \mathrm{XeF}_6 & IV. & \mathrm{sp}^3 \mathrm{~d}^2 ; \text{square pyramidal}\end{array}$ Choose the correct answer from the options given below: