Mark the molecular species, among the following, that is not electron-deficient:

1.  ${\mathrm{AlCl}}_3$

2.  ${\mathrm{BeH}}_2$

3.  ${{\mathrm{BH}}_4}^{-}$

4.  ${\mathrm{BF}}_3$

In which of the following molecule the intramolecular hydrogen bonding is not existing.

1.  Chloral hydrate

2.  O-chlorophenol

3.  Choral

4.  Salicylic acid

For the molecule ${\mathrm{MA}}_2{\mathrm{L}}_{\mathrm{n}}$ (where A is number of single bonded surrounding atoms, L indicates lone pair and 'n' is the number of lone pair and M is the central atom of 's' or 'p' block element) the possible range of 'n' is

1.  '1' to '4'

2.  zero to '4'

3.  '1' to '3'

4.  '0' to '3'

Carbon suboxide $\left({\mathrm{C}}_3{\mathrm{O}}_2\right)$ has

1.  Linear structure

2.  Bent structure

3.  Trigonal structure

4.  Distorted tetrahedral structure

${\mathrm{PCl}}_5$ is highly unstable and in solid state it exists as into ${\left[{\mathrm{PCl}}_4\right]}^{+} \mathrm{and} {\left[{\mathrm{PCl}}_6\right]}^{-}$ ions.
The geometry of ${\left[{\mathrm{PCl}}_6\right]}^{-}$ is

1.  Octahedral

2.  Tetrahedral

3.  Square pyramidal

4.  Square planar

In ${\mathrm{PO}}_4^{3-}$ ion, the formal charge on each oxygen atom and P-O bond order respectively are : 

1.  -0.75, 0.6

2.  -0.75, 1.0

3.  -0.75, 1.25

4.  -3.1, 1.25

The correct order of increasing bond angles in the following species is

1.  ${\mathrm{Cl}}_2\mathrm{O} < {\mathrm{ClO}}_2 < {\mathrm{ClO}}_2^{-}$

2.  ${\mathrm{ClO}}_2 < {\mathrm{Cl}}_2\mathrm{O} < {\mathrm{ClO}}_2^{-}$

3.  ${\mathrm{Cl}}_2\mathrm{O} < {\mathrm{ClO}}_2^{-} < {\mathrm{ClO}}_2$

4.  ClO₂^- < Cl₂O < ClO₂

Which of the following pairs of ions is isoelectronic and isostructural?

1.  ${\mathrm{CO}}_3^{2-}, {\mathrm{NO}}_3^{-}$

2.  ${\mathrm{CIO}}_3^{-}, {\mathrm{CO}}_3^{2-}$

3.  ${\mathrm{SO}}_3^{2-}, {\mathrm{NO}}_3^{-}$

4.  ${\mathrm{CIO}}_2^{-}, {\mathrm{SO}}_3^{2-}$

The correct geometry and hybridization for XeF₄ are : 

1.  Octahedral, sp³d²

2.  Trigonal bipyramidal, sp³d³

3.  Planar triangle, sp³d³

4.  Square planar, sp³d²

Which of the following pairs of species have the same bond order?

1. $O_2^{-},N{O}^{+}$

2. $C{N}^{-},CO$

3. $N_2, O_2^{-}$

2. CO,NO