Match the column :

	I		II
(P)	${\mathrm{BH}}_4^{-}$	(I)	Linear; 2 bond pair and 3 lone pair
(Q)	${\mathrm{ICl}}_2^{+}$	(II)	Tetrahedral, 4 bond pair and no lone pair
(R)	${\mathrm{ICl}}_2^{-}$	(III)	Tetrahedral; 3 bond pair and 1 lone pair
(S)	${\mathrm{ICl}}_4^{-}$	(IV)	V shaped; 2 bond pair and 2 lone pair
		(V)	Square planar; 4 bond pair and 2 lone pair
		(VI)	Square planar; 4 bond pair and no lone pair

1. P = II, Q = IV, R = III, S = VI

2.  P = II, Q = IV, R = I, S = V

3.  P = II, Q = I, R = V, S = VI  

4.  P = II, Q = I, R = III, S = IV

The molecule/s that will have non zero dipole moments is /are : 

1. 1,2-dichloro benzene.
2. Cis-3-hexene.
3. Trans-2-pentene.
4. All of the above.

Among the following species, identify the isostructural pairs :

NF₃, , BF₃, H₃O⁺, HN₃, ${\mathrm{NO}}_3^{-}$

1. [NF₃,${\mathrm{NO}}_3^{-}$ ] and [BF₃, H₃O⁺]                  

2. [NF₃, HN₃] and [${\mathrm{NO}}_3^{-}$, BF₃]   

3. [NF₃, H₃O⁺] and [${\mathrm{NO}}_3^{-}$, BF₃]         

4. [NF₃, H₃O⁺] and [HN₃, BF₃]

The linear structure is not assumed by

1. ${\mathrm{SnCl}}_2$

2. ${\mathrm{NCO}}^{-}$

3. ${\mathrm{NO}}^{+}$

4. ${\mathrm{NO}}_2^{+}$

${\mathrm{CO}}_3^{2-}$anion does not has which of the following characteristics

1. Bonds of unequal length                               

2. sp² hybridization  of c atom

3. Resonance stabilization                                   

4. Same bond angles

Which of the following process is not associated with change of hybridization of the underlined compound

1. $\underline{\mathrm{Al}}{\left(\mathrm{OH}\right)}_3$ ppt. dissolved in NaOH

2. ${\underline{\mathrm{B}}}_2{\mathrm{H}}_6$ is dissolved in THF

3. $\underline{\mathrm{Si}}{\mathrm{F}}_4$ vapour is passed through liq. HF

4. Solidification of $\underline{\mathrm{P}}{\mathrm{Cl}}_5$ vapour

Incorrect statement among the given options is: 

Favourable conditions for electrovalency are:

The correct order of the O–O bond length in ${\mathrm{O}}_2,{\mathrm{H}}_2{\mathrm{O}}_2 \mathrm{and} {\mathrm{O}}_3$ is :-

1. ${\mathrm{O}}_2>{\mathrm{O}}_3>{\mathrm{H}}_2{\mathrm{O}}_2$

2. ${\mathrm{O}}_3>{\mathrm{H}}_2{\mathrm{O}}_2>{\mathrm{O}}_2$

3. ${\mathrm{H}}_2{\mathrm{O}}_2>{\mathrm{O}}_3>{\mathrm{O}}_2$

4. ${\mathrm{H}}_2{\mathrm{O}}_2>{\mathrm{O}}_2>{\mathrm{O}}_3$

CaO and NaCl have the same crystal structure and approximately the same ionic radii. If U is the lattice energy of NaCl, the approximate lattice energy of CaO is :-

1. U/2 

2. U 

3. 2 U 

4. 4 U