The bond order of 1.5 is shown by:  

1.	\(\text O^+_2\)	2.	\(\text O^-_2\)
3.	\(\text O^{2-}_2\)	4.	\(\text O_2\)

Identify the wrong statement among the following.

Which of the following species contains three bond pairs and one lone pair around the central atom?

1. \(\text H_{2} \text O\)

2. \(\text{BF}_{3}\)

3. \(\text{NH}^-_2\)

4. \(\text{PCl}_{3}\)

The pair of species with the same bond order is:

1. $O_2^{2-},$ $B_2$

2. $O_2^{+},{NO}^{+}$

3. \(\text {NO, CO}\)

4. $N_2,O_2$

Which of the two ions from the list given below have the geometry that is explained by the same hybridisation of orbitals, ${\mathrm{NO}}_2^{-},{\mathrm{NO}}_3^{-},{\mathrm{NH}}_2^{-},{\mathrm{NH}}_4^{-},{\mathrm{SCN}}^{-}$ ?

1.  ${\mathrm{NH}}_4^{-}$ $\mathrm{and}$ ${\mathrm{NO}}_3^{-}$

2.  ${\mathrm{SCN}}_{}^{-}$ $\mathrm{and}$ ${\mathrm{NH}}_2^{-}$

3.  ${\mathrm{NO}}_2^{-}$ $\mathrm{and}$ ${\mathrm{NH}}_2^{-}$

4.  ${\mathrm{NO}}_2^{-}$ $\mathrm{and}$ ${\mathrm{NO}}_3^{-}$

Which of the following has the minimum bond length?

1.  ${\mathrm{O}}_2^{-}$

2.  ${\mathrm{O}}_2^{2-}$

3.  ${\mathrm{O}}_2$

4.  ${\mathrm{O}}_2^{+}$

In which of the following pairs of molecules/ions, the central atoms have sp² hybridization?

1. $N{O}_2^{-}$ $and$ $N{H}_3$

2. $B{F}_3$ $and$ $N{O}_2^{-}$

3. $N{H}_2^{-}and$ $H_{2}O$

4. $B{F}_3$ $and$ $N{H}_2^{-}$

A molecule/ion among the following species that does not exist under normal conditions is:

1. \(Be^+_2\)
2. \(Be_2\)
3. \(B_2\)
4. \(Li_2\)

In which one of the following species the central atom has the type of hybridization which is not the same as that present in the other three?

1. ${\mathrm{SF}}_4$

2. ${\mathrm{I}}_3^{-}$

3. ${\mathrm{SbCl}}_5^{2-}$

4. ${\mathrm{PCl}}_5$

According to the MO theory, which of the following lists ranks the nitrogen species in terms of increasing bond order?

1. $N_2^{-}<N_2<N_2^{2-}$

2. $N_2^{2-}<N_2^{-}<N_2$

3. $N_2<N_2^{2-}<N_2^{-}$

4. $N_2^{-}<N_2^{2-}<N_2$