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Q. No.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
Subtopic: V.S.E.P.R & V.B.T |
87%
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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What is the formal charge on the central nitrogen in the Lewis structure of N2O?
| 1. | 0 |
| 2. | +1 |
| 3. | -1 |
| 4. | 0 in some resonance structures, –1 in other resonance structures |
Subtopic: Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
57%
Level 3: 35%-60%
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Given the following five species:
\(\mathrm{NH}_3, \mathrm{AlCl}_3, \mathrm{BeCl}_2, \mathrm{CCl}_4, \mathrm{PCl}_5 \)
The total number of these species that do not have eight electrons around the central atom in its/their outermost shell, is/are:
\(\mathrm{NH}_3, \mathrm{AlCl}_3, \mathrm{BeCl}_2, \mathrm{CCl}_4, \mathrm{PCl}_5 \)
The total number of these species that do not have eight electrons around the central atom in its/their outermost shell, is/are:
| 1. | One | 2. | Three |
| 3. | Two | 4. | Four |
Subtopic: Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
61%
Level 2: 60%+
NEET - 2023
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Which compound among the following represents an expanded octet?
1. \(\text{BeH}_2 \)
2. \(\text{LiCl}\)
3. \(\text{H}_2\text{SO}_4 \)
4. \(\text{NO} \)
1. \(\text{BeH}_2 \)
2. \(\text{LiCl}\)
3. \(\text{H}_2\text{SO}_4 \)
4. \(\text{NO} \)
Subtopic: Resonance & Nature of Compounds |
81%
Level 1: 80%+
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Non-polar molecule among the following is/are:
1. (a) and (d) only
2. (a), (b), (c) and (d)
3. (a), (b) and (d) only
4. (b) and (d) only
| a. |  |
b. |  |
| c. |  |
d. |  |
1. (a) and (d) only
2. (a), (b), (c) and (d)
3. (a), (b) and (d) only
4. (b) and (d) only
Subtopic: Polarity |
69%
Level 2: 60%+
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Repulsive interaction of electron pairs follow the order:
| 1. | LP-LP > BP-BP > LP-BP |
| 2. | LP-BP > BP-BP > LP-LP |
| 3. | LP-LP > LP-BP > BP-BP |
| 4. | BP-BP > LP-BP > LP-LP |
Subtopic: V.S.E.P.R & V.B.T |
95%
Level 1: 80%+
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Match molecules in List-I with the Corresponding shape in List-II:
Choose the correct answer from the options given below:
| List-I (Molecules) |
List-II (Shape) |
||
| (a) | NH3 | (i) | Square pyramidal |
| (b) | ClF3 | (ii) | Trigonal bipyramidal |
| (c) | PCl5 | (iii) | Trigonal pyramidal |
| (d) | BrF5 | (iv) | T-shape |
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (iii) | (iv) | (i) |
| 2. | (iii) | (iv) | (ii) | (i) |
| 3. | (iv) | (iii) | (i) | (ii) |
| 4. | (iii) | (iv) | (i) | (ii) |
Subtopic: V.S.E.P.R & V.B.T |
83%
Level 1: 80%+
NEET - 2022
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The correct order of bond angles in the following compounds/ species is:
| 1. | \(\mathrm{H}_2 \mathrm{O}<\mathrm{NH}_3<\mathrm{NH}_4^{+}<\mathrm{CO}_2 \) |
| 2. | \(\mathrm{H}_2 \mathrm{O}<\mathrm{NH}_4^{+}<\mathrm{NH}_3<\mathrm{CO}_2 \) |
| 3. | \(\mathrm{H}_2 \mathrm{O}<\mathrm{NH}_4^{+}=\mathrm{NH}_3<\mathrm{CO}_2 \) |
| 4. | \(\mathrm{CO}_2<\mathrm{NH}_3<\mathrm{H}_2 \mathrm{O}<\mathrm{NH}_4^{+} \) |
Subtopic: V.S.E.P.R & V.B.T |
68%
Level 2: 60%+
NEET - 2022
Hints
The molecules that have an overall permanent dipole moment among the following is/are:
(A) CO2
(B) H2O
(C) NH3
(A) CO2
(B) H2O
(C) NH3
| 1. | A and C only | 2. | C and B only |
| 3. | A, B, and C | 4. | None of these |
Subtopic: Polarity |
82%
Level 1: 80%+
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