Q. No.Given below are two statements:
In the light of the above statements, choose the most appropriate answer from the options given below :
| Statement I: | A hypothetical diatomic molecule with bond order zero is quite stable. |
| Statement II: | As bond order increases, the bond length increases. |
| 1. | Statement I is True but Statement II is False. |
| 2. | Statement I is False but Statement II is True. |
| 3. | Both Statement I and Statement II are True. |
| 4. | Both Statement I and Statement II are False. |
Subtopic: M.O.T |
54%
From NCERT
NEET - 2025
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Identify the correct orders against the property mentioned
Choose the correct answer from the options given below:
1. A and C only
2. B and C only
3. A and D only
4. B and D only
| A. | \(\mathrm{H}_2 \mathrm{O}>\mathrm{NH}_3>\mathrm{CHCl}_3 -\text { }\)dipole moment |
| B. | \(\mathrm{XeF}_4>\mathrm{XeO}_3>\mathrm{XeF}_2-\text { }\)number of lone pairs on central atom |
| C. | \(\mathrm{O}-\mathrm{H}>\mathrm{C}-\mathrm{H}>\mathrm{N}-\mathrm{O}-\text { }\) bond length |
| D. | \(\mathrm{N}_2>\mathrm{O}_2>\mathrm{H}_2 \text { } -\) bond enthalpy |
1. A and C only
2. B and C only
3. A and D only
4. B and D only
Subtopic: M.O.T | Polarity | V.S.E.P.R & V.B.T |
66%
From NCERT
NEET - 2025
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Which one of the following molecules is paramagnetic?
1. \(\mathrm{H}_2\)
2. \(\mathrm{Li}_2\)
3. \(\mathrm{C_2}\)
4. \(\mathrm{O}_2\)
1. \(\mathrm{H}_2\)
2. \(\mathrm{Li}_2\)
3. \(\mathrm{C_2}\)
4. \(\mathrm{O}_2\)
Subtopic: M.O.T |
85%
From NCERT
NEET - 2024
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Match List-I with List-II:
Identify the correct answer from the option given below:
| List-I (Atom/Molecule) |
List-II (Property) |
||
| A. | Nitrogen | I. | Paramagnetic |
| B. | Fluorine molecule | II. | Most reactive element in group 18 |
| C. | Oxygen molecule | III. | Element with highest ionisation enthalpy in group 15 |
| D. | Xenon atom | IV. | Strongest oxidising agent |
| 1. | A- III, B-I, C-IV, D-II | 2. | A-I, B-IV, C-III, D-II |
| 3. | A-II, B-IV, C-I, D-II | 4. | A-III, B-IV, C-I, D-II |
Subtopic: M.O.T |
81%
From NCERT
NEET - 2024
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The correct order of energies of molecular orbitals of N2 molecule is:
| 1. | \( \sigma \text { 1s }<\sigma^* \text { 1s }<\sigma 2 s<\) \(\sigma^* 2 s<\left(\pi 2 p_x=\pi 2 p_y\right)<\) \(\left(\pi^* 2 p_x=\pi^* 2 p_y\right)<\sigma 2 p_z<\sigma^* 2 p_z\) |
| 2. | \( \sigma \text { 1s }<\sigma^* \text { 1s }<\sigma 2 s<\sigma^* 2 s<\) \(\left(\pi 2 p_x=\pi 2 p_y\right)< \) \(\sigma 2 p_z<\left(\pi^* 2 p_x=\pi^* 2 p_y\right)<\sigma^* 2 p_z \) |
| 3. | \( \sigma \text { 1s }<\sigma^* \text { 1s }<\sigma 2 s<\sigma^* 2 s<\sigma 2 p_z<\) \( \left(\pi 2 p_x=\pi 2 p_y\right)<\) \(\left(\pi^* 2 p_x=\pi^* 2 p_y\right)<\sigma^* 2 p_z \) |
| 4. | \( \sigma \text { 1s }<\sigma^* \text { 1s }\) \(<\sigma 2 s<\sigma^* 2 s<\sigma 2 p_z< \) \( \sigma^* 2 p_z<\left(\pi 2 p_x=\pi 2 p_y\right)<\) \(\left(\pi^* 2 p_x=\pi^* 2 p_y\right) \) |
Subtopic: M.O.T |
73%
From NCERT
NEET - 2023
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Which one of the following statements is incorrect related to Molecular Orbital Theory?
| 1. | The \(\pi^*\) antibonding molecular orbital has a node between the nuclei. |
| 2. | In the formation of a bonding molecular orbital, the two electron waves of the bonding atoms reinforce each other. |
| 3. | Molecular orbitals obtained from \(2P_x\) and \(2P_y\) orbitals are symmetrical around the bond axis. |
| 4. | A \(\pi-\)bonding molecular orbital has larger electron density above and below the internuclear axis. |
Subtopic: M.O.T |
51%
From NCERT
NEET - 2023
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Identify the incorrect statement among the following options:
| 1. | \(O^+_2\) ion is diamagnetic. |
| 2. | The bond orders of \(O_2^{+},O_2,O^-_2\) and \(O_2^{2-}\) are 2.5, 2, 1.5, and 1, respectively. |
| 3. | \(C_2\) molecule has four electrons in its two degenerate \(\pi \) molecular orbitals. |
| 4. | \(H^+_2 \) ion has one electron. |
Subtopic: M.O.T |
79%
From NCERT
NEET - 2022
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Which one of the following is the correct order of decreasing bond enthalpies for the given species?
1. \(\mathrm {O^{2-}_2>O^-_2>O_2>N_2 }\)
2. \(\mathrm {N_2>O_2>O^{2-}_2>O^-_2 }\)
3. \(\mathrm {N_2>O_2>O^-_2>O^{2-}_2 }\)
4. \(\mathrm {O_2>N_2>O^-_2>O^{2-}_2 }\)
Subtopic: M.O.T |
74%
From NCERT
NEET - 2022
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A diatomic molecule, among the following species, that only has bonds according to the Molecular Orbital Theory (MOT) is:
| 1. | Be2 | 2. | O2 |
| 3. | N2 | 4. | C2 |
Subtopic: M.O.T |
62%
From NCERT
NEET - 2019
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