The species that does not have unpaired electrons is:
 

Among the following, the correct order of energies of molecular orbitals of N₂ is:

1. $\left(\mathrm{\pi }2{\mathrm{p}}_{\mathrm{y}}\right)<\left(\mathrm{\sigma }2{\mathrm{p}}_{\mathrm{z}}\right)<(\mathrm{\pi }*2{\mathrm{p}}_{\mathrm{x}})\approx (\mathrm{\pi }*2{\mathrm{p}}_{\mathrm{y}})$

2. $\left(\mathrm{\pi }2{\mathrm{p}}_{\mathrm{y}}\right)>\left(\mathrm{\sigma }2{\mathrm{p}}_{\mathrm{z}}\right)>(\mathrm{\pi }*2{\mathrm{p}}_{\mathrm{x}})\approx (\mathrm{\pi }*2{\mathrm{p}}_{\mathrm{y}})$

3. $\left(\mathrm{\pi }2{\mathrm{p}}_{\mathrm{y}}\right)<\left(\mathrm{\sigma }2{\mathrm{p}}_{\mathrm{z}}\right)\approx <mspace\; width="1em"></mspace>(\mathrm{\pi }*2{\mathrm{p}}_{\mathrm{x}})\approx (\mathrm{\pi }*2{\mathrm{p}}_{\mathrm{y}})$

4. $\left(\mathrm{\pi }2{\mathrm{p}}_{\mathrm{y}}\right)>\left(\mathrm{\sigma }2{\mathrm{p}}_{\mathrm{z}}\right)<(\mathrm{\pi }*2{\mathrm{p}}_{\mathrm{x}})\approx (\mathrm{\pi }*2{\mathrm{p}}_{\mathrm{y}})$

From the perspective of molecular orbital theory, which statement is false?

What is the correct sequence of bond order for the specified species?

Match the species in Column-I with the bond order in Column-II.

Choose the correct option: 

Which of the following have identical bond order?

(a) ${\mathrm{CN}}^{-}$

(b) ${\mathrm{NO}}^{+}$

(c) ${\mathrm{O}}_2^{-}$

(d) ${\mathrm{O}}_2^{2-}$

Choose the correct option

1. (a), (b)

2. (b), (c)

3. (c), (d)

4. (b), (d)

Diamagnetic species are those which contain no unpaired electrons. Among the following, diamagnetic species are

Choose the correct option:

(a) ${\mathrm{N}}_2$

(b) ${\mathrm{N}}_2^{-}$

(c) ${\mathrm{F}}_2^{+}$

(d) ${\mathrm{O}}_2^{-}$

Choose the correct option:

1. (a), (d)

2. (b), (c)

3. (c), (d)

4. (b), (d)