Which of the following statements is incorrect?

1.	For isoelectronic species, a smaller positive charge on the cation results in a smaller ionic radius.
2.	For isoelectronic species, a greater negative charge on the anion results in a larger ionic radius.
3.	Atomic radius increases as you move down Group 1 of the Periodic Table.
4.	Atomic radius decreases across Period 2 from left to right.

The set of isomers of ${\mathrm{C}}_6{\mathrm{H}}_4{\mathrm{Cl}}_2$ that have an equal dipole moment with ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{Cl}$ & C₆H₆ respectively is : 

Xe F${}_2$ is isostructural with : 

1. ${\mathrm{SbCl}}_3$

2. ${\mathrm{BCl}}_3$

3. ${\mathrm{TeF}}_2$

4. ${\mathrm{ICl}}_2^{-}$

Non-Zero dipole moment is shown by : 

1. ${\mathrm{CO}}_2$

2. p-Dichlorobenzene

3. Carbontetrachloride

4. Water.

An incorrect statement regarding resonating structures is : 

Assuming that Hund's rule is violated, the bond order and magnetic nature of the diatomic molecule $B_2$ is:

The hybridization of orbitals of N atom in $N{O}_3^{-},<mspace\; width="1em"></mspace>N{O}_2^{+,\hspace{0.17em}}and<mspace\; width="1em"></mspace>N{H}_4^{+}$ are respectively:

1. $sp,<mspace\; width="1em"></mspace>s{p}^2,<mspace\; width="1em"></mspace>s{p}^3$

2. $s{p}^2,<mspace\; width="1em"></mspace>sp,<mspace\; width="1em"></mspace>s{p}^3$

3. $sp,<mspace\; width="1em"></mspace>s{p}^3,<mspace\; width="1em"></mspace>s{p}^2$

4. $s{p}^2,<mspace\; width="1em"></mspace>s{p}^3,<mspace\; width="1em"></mspace>sp$

Which of the following compounds is a planar and a polar compound?
 
1. TeCl₄
2. SO₂
3. SF₆
4. XeF₂

A molecule having the smallest bond angle among the following is :

Molecule/Ion that is diamagnetic in nature is: