Which of the following pairs of species have similar shapes?

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

Incorrect statement about resonance is :

1. The resonating structures are hypothetical.

2. The unpaired electrons in various resonating structures are same.

3. Hybrid structure is most energetic.

4. Hybrid structure is least energetic.

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⁺

A diatomic molecule, among the following species, that only has $\mathrm{\pi }$ bonds according to the Molecular Orbital Theory (MOT) is:

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. $S{F}_4 and Xe{F}_4$

2. $S{O}_3^{2-} and N{O}_3^{-}$

3. $B{F}_3 and N{F}_3$

4. $Br{O}_3^{-} and Xe{O}_3$