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Q. No.
Subtopic: Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
86%
Level 1: 80%+
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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 |
91%
Level 1: 80%+
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Which of the following molecules or ions have one or more lone pairs of valence electrons on their central atom?
| 1. | \(\mathrm{AlCl_4^-}\) | 2. | \(\mathrm{CO_2}\) |
| 3. | \(\mathrm{PCl_4^+}\) | 4. | \(\mathrm{SO_2}\) |
Subtopic: Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
79%
Level 2: 60%+
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A molecule, among the following, that obeys the octet rule is:
| 1. | \(\mathrm{PF}_5 \) | 2. | \(\mathrm{SF}_6 \) |
| 3. | \(\mathrm{CCl}_4 \) | 4. | \(\mathrm{BH}_3\) |
Subtopic: Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
85%
Level 1: 80%+
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Match the columns and select the correct option:
1. A → 1; B → 2; C → 3; D → 4
2. A → 3; B → 1; C → 2; D → 4
3. A → 4; B → 2; C → 1; D → 3
4. A → 3; B → 2; C → 1; D → 4
| Column-I | Column-II | ||
| (A) | \(ClO^-_2\) | 1. | Linear |
| (B) | \(N^-_3 \) | 2. | Tetrahedral |
| (C) | \(NH^+_4 \) | 3. | Bent |
| (D) | \(SF_4 \) | 4. | See-saw |
1. A → 1; B → 2; C → 3; D → 4
2. A → 3; B → 1; C → 2; D → 4
3. A → 4; B → 2; C → 1; D → 3
4. A → 3; B → 2; C → 1; D → 4
Subtopic: V.S.E.P.R & V.B.T |
86%
Level 1: 80%+
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The sum of the number of lone pairs in a central atom in \(IF_5 \) and \(IF_7 \) is:
1. 2
2. 0
3. 1
4. 3
1. 2
2. 0
3. 1
4. 3
Subtopic: V.S.E.P.R & V.B.T |
87%
Level 1: 80%+
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How many of the following species have 10 electrons?
| (i) | \(\mathrm{O}^{2-}\) | (ii) | O |
| (iii) | \( \mathrm{Al}^{3+}\) | (iv) | Al |
| (v) | F | (vi) | \(\mathrm{F}^{-}\) |
| (vii) | \(\mathrm{Mg}^{2+}\) | (viii) | Mg |
| (ix) | \(\mathrm{N}^{3-}\) |
Choose the correct option:
1. Five ions have 10 electrons.
2. Six ions have 10 electrons.
3. Four ions have 10 electrons.
4. Seven ions have 10 electrons.
Subtopic: Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
82%
Level 1: 80%+
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The set of molecules having zero dipole moment is:
1. \(\mathrm{NF}_3, \mathrm{CO}_2, \mathrm{CCl}_4 \)
2. \(\mathrm{BF}_3, \mathrm{H}_2 \mathrm{S}, \mathrm{CCl}_4 \)
3. \(\mathrm{BF}_3, \mathrm{CO}_2, \mathrm{CCl}_4\)
4. \(\mathrm{BF}_3, \mathrm{CO}_2, \mathrm{CHCl}_3 \)
1. \(\mathrm{NF}_3, \mathrm{CO}_2, \mathrm{CCl}_4 \)
2. \(\mathrm{BF}_3, \mathrm{H}_2 \mathrm{S}, \mathrm{CCl}_4 \)
3. \(\mathrm{BF}_3, \mathrm{CO}_2, \mathrm{CCl}_4\)
4. \(\mathrm{BF}_3, \mathrm{CO}_2, \mathrm{CHCl}_3 \)
Subtopic: Polarity |
84%
Level 1: 80%+
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Which of the following pairs is expected to have the same bond order?
1. \(\mathrm{O}_2^{-}, \mathrm{N}_2^{-}\)
2. \(\mathrm{O}_2^{-}, \mathrm{N}_2^{+}\)
3. \(\mathrm{O}_2^{+}, \mathrm{N}_2^{-} \)
4. \(\mathrm{O}_2, \mathrm{~N}_2 \)
1. \(\mathrm{O}_2^{-}, \mathrm{N}_2^{-}\)
2. \(\mathrm{O}_2^{-}, \mathrm{N}_2^{+}\)
3. \(\mathrm{O}_2^{+}, \mathrm{N}_2^{-} \)
4. \(\mathrm{O}_2, \mathrm{~N}_2 \)
Subtopic: M.O.T |
90%
Level 1: 80%+
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Subtopic: V.S.E.P.R & V.B.T |
84%
Level 1: 80%+
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