Which of the following pairs of metals is purified by van Arkel method?

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: