Q. No.If an extra electron is added to the hypothetical molecule C2, this extra electron will occupy the molecular orbital:
1. \(\pi_{2p}\)*
2. \(\pi_{2p}\)
3. \(\sigma_{2p}\)*
4. \(\sigma_{2p}\)
1. \(\pi_{2p}\)*
2. \(\pi_{2p}\)
3. \(\sigma_{2p}\)*
4. \(\sigma_{2p}\)
Subtopic: M.O.T |
55%
Level 3: 35%-60%
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The bond order and magnetic behaviour exhibited by \(\text C_2\) molecule are:
| 1. | 3 and paramagnetic | 2. | 2 and paramagnetic |
| 3. | 3 and diamagnetic | 4. | 2 and diamagnetic |
Subtopic: M.O.T |
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Level 2: 60%+
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Overlapping of orbital that does not produce bond is:
(Assume z is the internuclear axis)
| 1. | pz - pz | 2. | s - pz |
| 3. | s - s | 4. | px - px |
Subtopic: M.O.T |
64%
Level 2: 60%+
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Given below are two statements:
In the light of the above statements, choose the most appropriate answer from the options given below:
| Assertion (A): | An atomic orbital is monocentric, whereas a molecular orbital is polycentric. |
| Reason (R): | An electron in an atomic orbital is influenced by one nucleus whereas in a molecular orbital, it is influenced by two or more nuclei depending upon the number of atoms in a molecule. |
In the light of the above statements, choose the most appropriate answer from the options given below:
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: M.O.T |
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Level 1: 80%+
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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 |
52%
Level 3: 35%-60%
NEET - 2023
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Diamagnetic species are those which contain no unpaired electrons. Among the following, diamagnetic species are
| (a) | (b) | ||
| (C) | (d) |
Choose the correct option:
| 1. | (a), (d) | 2. | (b), (c) |
| 3. | (c), (d) | 4. | (b), (d) |
Subtopic: M.O.T |
79%
Level 2: 60%+
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Identify the species with identical bond orders from the following options.
(a)
(b)
(c)
(d)
Choose the correct option:
1. (a), (d)
2. (b), (c)
3. (c), (d)
4. (b), (d)
Subtopic: M.O.T |
81%
Level 1: 80%+
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Of the species, NO , NO+, NO2+ and NO– , the one with minimum bond strength is:
1. NO2+
2. NO+
3. NO
4. NO–
Subtopic: M.O.T |
69%
Level 2: 60%+
JEE
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According to molecular orbital theory, which of the following molecules is not expected to be stable?
| 1. | \(\mathrm{He}_2^{2+}\) | 2. | \(\mathrm{He}_2^{+}\) |
| 3. | \(\mathrm{H}_2^{-}\) | 4. | \(\mathrm{H}_2^{2-}\) |
Subtopic: M.O.T |
68%
Level 2: 60%+
JEE
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