Which of the following pairs of species have similar shapes?

1.	PCl3, NH3	2.	CF4, SF4
3.	PbCl2, CO2	4.	PF5 , IF5

Which of the following is an incorrect statement about resonance?

Which of the following species deviates from the octet rule?

1. $C{O}_3^{2-}$

2. $H_{2}S{O}_3$

3. $PC{l}_3$

4. $O_3$

 A bent T-shape molecule among the following is:

1. \(\mathrm{ICl}^-_4\)
2. \(\mathrm{PCl}_3\)
3. \(\mathrm{BrF}_3\)
4. \(\mathrm{I}^-_3\)

Among the following oxides, which has the maximum lattice energy?
1. MgO
2. CaO
3. SrO
4. BaO

Among the following, which has the maximum hydration energy?

1. OH^-

2. ${\mathrm{NH}}_4^{+}$

3. F^-

4. H⁺

According to Molecular Orbital Theory (MOT), which of the following diatomic species contains only \(\pi\) bonds in its ground state?

The number of unpaired electrons in a paramagnetic diatomic molecule of an element with atomic number 16 is:

1. 2

2. 3

3. 4

4. 1

Which of the following is the most basic oxide?

1. $A{l}_2{O}_3$

2. $S{b}_2{O}_3$

3. $B{i}_2{O}_3$

4. $Se{O}_2$

In which of the following pairs, the two species are iso-structural?

1. $S{F}_4<mspace\; width="1em"></mspace>and<mspace\; width="1em"></mspace>Xe{F}_4$

2. $S{O}_3^{2-}<mspace\; width="1em"></mspace>and<mspace\; width="1em"></mspace>N{O}_3^{-}$

3. $B{F}_3<mspace\; width="1em"></mspace>and<mspace\; width="1em"></mspace>N{F}_3$

4. $Br{O}_3^{-}<mspace\; width="1em"></mspace>and<mspace\; width="1em"></mspace>Xe{O}_3$