Match the following:

	Oxide		Nature
(a)	CO	(i)	Basic
(b)	BaO	(ii)	Neutral
(c)	Al2O3	(iii)	Acidic
(d)	Cl2O7	(iv)	Amphoteric

Which of the following is the correct option?

	a	b	c	d
1.	(ii)	(i)	(iv)	(iii)
2.	(iii)	(iv)	(i)	(ii)
3.	(iv)	(iii)	(ii)	(i)
4.	(i)	(ii)	(iii)	(iv)

A molecule that cannot exist is:

Electron deficient species among the following is: 

1. ${\mathrm{PH}}_3$

2. ${\left(C{H}_3\right)}_2$

3. ${\mathrm{BH}}_3$

4. ${\mathrm{NH}}_3$

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 : 

An ion having  the shortest bond length among the following is -

1. $O_2^{+}$

2. $O_2^{-}$

3. $O_2^{2-}$

4. $O_2^{2+}$

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

The species having pyramidal shape is:

(1) $S{O}_3$

(2) $Br{F}_3$

(3) $Si{O}_3^{2-}$

(4) OSF₂

Among the following the maximum covalent character is shown by the compound:

(1) FeCl₂

(2) SnCl₂

(3) AlCl₃

(4) MgCl₂