A paramagnetic molecule among the following is:
1. | O2– | 2. | CN– |
3. | NO+ | 4. | CO |
Molecule/Ion that is diamagnetic in nature is:
1. | \(\mathrm{H}^-_2\) | 2. | \(\mathrm{H}_2\) |
3. | \(\mathrm{H}^+_2\) | 4. | \(\mathrm{He}^+_2\) |
In the option are given sequences of increasing bond order for the following species. The correct option is :
\(\mathrm{O}_2,\mathrm{N}_2,\mathrm{O}^+_2 ~\mathrm{and}~\mathrm{O}^-_2\)
1. | \(\mathrm{O}_2>\mathrm{N}_2>\mathrm{O}^+_2>\mathrm{O}^-_2\) | 2. | \(\mathrm{O}^-_2>\mathrm{O}_2>\mathrm{O}^+_2>\mathrm{N}_2\) |
3. | \(\mathrm{N}_2>\mathrm{O}^+_2>\mathrm{O}_2>\mathrm{O}^-_2\) | 4. | \(\mathrm{O}^-_2>\mathrm{O}^+_2>\mathrm{O}_2>\mathrm{N}_2\) |
Paramagnetic species among the following is:
1. CO
2.
3. CN-
4. NO+
What is the correct sequence of bond order for the specified species?
1. | \(\mathrm{O}^-_2>\mathrm{O}_2>\mathrm{O}^+_2\) | 2. | \(\mathrm{O}^-_2<\mathrm{O}_2<\mathrm{O}^+_2\) |
3. | \(\mathrm{O}^-_2>\mathrm{O}_2<\mathrm{O}^+_2\) | 4. | \(\mathrm{O}^-_2<\mathrm{O}_2>\mathrm{O}^+_2\) |
A pair in which both species are not likely to exist is:
1. | \(H^+_2,He^{2-}_2\) | 2. | \(H^-_2,He^{2+}_2\) |
3. | \(H^{2+}_2,He_2\) | 4. | \(H^+_2,He^{2+}_2\) |
The bond order of 1.5 is shown by:
1. | \(\text O^+_2\) | 2. | \(\text O^-_2\) |
3. | \(\text O^{2-}_2\) | 4. | \(\text O_2\) |
The relative order of stability of the following species: \(\mathrm{O}_2,\mathrm{O}^+_2,\mathrm{O}^-_2~\mathrm{and}~\mathrm{O}^{2-}_2\) is -
1. | \(\mathrm{O}^+_2>\mathrm{O}_2>\mathrm{O}^-_2>\mathrm{O}^{2-}_2\) | 2. | \(\mathrm{O}^{2-}_2>\mathrm{O}_2>\mathrm{O}^-_2>\mathrm{O}^{+}_2\) |
3. | \(\mathrm{O}_2>\mathrm{O}^+_2>\mathrm{O}^-_2>\mathrm{O}^{2-}_2\) | 4. | \(\mathrm{O}_2>\mathrm{O}^{2-}_2>\mathrm{O}^-_2>\mathrm{O}^{+}_2\) |
In which of the following pairs of molecules/ions, the central atoms have \(\mathrm{sp}^2\) hybridisation?
1. | \(\mathrm{NO}^-_2 ~\mathrm{and}~ \mathrm{NH}_3\) | 2. | \(\mathrm{BF}_3 ~\mathrm{and}~ \mathrm{NO}^-_2\) |
3. | \(\mathrm{NH}^-_2 ~\mathrm{and}~ \mathrm{H_2O}\) | 4. | \(\mathrm{BF}_3 ~\mathrm{and}~ \mathrm{NH}^-_2\) |