$X-O-X$ linkage is present in $[X = P/S/Cl/Mn]$:
$(a) P_2O_7^{4-}$
$(b) S_2O_5^{2-}$
$(c) S_2O_7^{2-}$
$(d) Cl_2O_7$
$(e) Mn_2O_7$
$(f) S_2O_8^{2-}$

Determine the correct $(T)$ and incorrect $(F)$ statements for the permanganate ion $(MnO_4^-)$:
$(a)$ $MnO_4^-$ contains $\sigma$ bonds.
$(b)$ $MnO_4^-$ contains $\pi$ bonds.
$(c)$ $MnO_4^-$ contains both $\sigma$ and $\pi$ bonds.
$(d)$ $MnO_4^-$ is paramagnetic.

With what neutral molecule is $ClO^{-}$ isoelectronic? Is that molecule a Lewis base?

Match the following molecules in Column $I$ with the number of lone pairs on their central atom in Column $II$.

Column $I$ (Molecules)	Column $II$ (Number of lone pairs on central atom)
$A. \ NH_3$	$1. \ \text{Two}$
$B. \ H_2O$	$2. \ \text{Three}$
$C. \ XeF_2$	$3. \ \text{Zero}$
$D. \ CH_4$	$4. \ \text{Four}$
	$5. \ \text{One}$

Which of the following pairs of ions is isoelectronic and isostructural?

Which of the following is the correct decreasing order of bond length for $N_2$, $O_2$, and $Cl_2$?