Which of the following does not show optical isomerism - (en = Ethylenediamine)

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?

Which among the following electronic configurations belong to main group elements? A. $[\mathrm{Ne}] 3 \mathrm{~s}^1$ B. $[\operatorname{Ar}] 3 \mathrm{~d}^3 4 \mathrm{~s}^2$ C. $[\mathrm{Kr}] 4 d^{10} 5 s^2 5 p^5$ D. $[\mathrm{Ar}] 3 \mathrm{~d}^{10} 4 \mathrm{~s}^1$ E. $[R n] 5 f^0 6 d^2 7 s^2$ Choose the correct answer from the option given below:

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 :