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Q. No.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 |
62%
Level 2: 60%+
NEET - 2023
Hints
Which pair of ions among the following list do not constitute an iso-electronic pair?
1. Mn2+, Fe3+
2. Fe2+, Mn2+
3. O2–, F–
4. Na+, Mg2+
Subtopic: Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
81%
Level 1: 80%+
NEET - 2021
Hints
Which of the following pairs of ions are isoelectronic and isostructural?
| 1. | \(\mathrm{CO}_3^{2-}, \mathrm{SO}_3^{2-} \) | 2. | \(\mathrm{ClO}_3^{-}, \mathrm{CO}_3^{2-} \) |
| 3. | \(\mathrm{SO}_3^{2-}, \mathrm{NO}_3^{-} \) | 4. | \(\mathrm{ClO}_3^{-}, \mathrm{SO}_3^{2-}\) |
Subtopic: Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
72%
Level 2: 60%+
NEET - 2015
Hints
Subtopic: Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
79%
Level 2: 60%+
AIPMT - 2013
Hints
Subtopic: Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
76%
Level 2: 60%+
AIPMT - 2013
Hints
Identify the incorrect statement among the following:
| 1. | Amongst isoelectronic species, the smaller the positive charge on the cation, the smaller is the ionic radius |
| 2. | Amongst isoelectronic species, the greater the negative charge on the anion, the larger is ionic radius |
| 3. | Atomic radius of the elements increases as one moves down the first group of the periodic table |
| 4. | Atomic radius of the elements decreases as one moves across from left to right in the 2nd period of the periodic table |
Subtopic: Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
76%
Level 2: 60%+
AIPMT - 2012
Hints
Match Column I (Molecule) with Column II (Bond enthalpy) and mark the correct option:
| Column-I (Molecule) |
Column-II (Bond enthalpy) \(\left(k J \mathrm{~mol}^{-1}\right)\) |
||
| A. | HCl | I. | 435.8 |
| B. | \(\mathrm{N_2}\) | II. | 498 |
| C. | \(\mathrm{H_2}\) | III. | 946.0 |
| D. | \(\mathrm{O_2}\) | IV. | 431.0 |
| 1. | A-III, B-IV, C-I, D-II | 2. | A-IV, B-I, C-III, D-II |
| 3. | A-IV, B-III, C-II, D-I | 4. | A-IV, B-III, C-I, D-II |
Subtopic: Types of Chemical Bond |
66%
Level 2: 60%+
NEET - 2024
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Subtopic: Types of Chemical Bond |
79%
Level 2: 60%+
NEET - 2015
Hints
Dipole-induced dipole interactions are present in which of the following pairs?
1. Cl2 and CCl4
2. HCl and He atoms
3. SiF4 and He atoms
4. H2O and Alcohol
1. Cl2 and CCl4
2. HCl and He atoms
3. SiF4 and He atoms
4. H2O and Alcohol
Subtopic: Types of Chemical Bond |
60%
Level 2: 60%+
AIPMT - 2013
Hints
Subtopic: Types of Chemical Bond |
88%
Level 1: 80%+
AIPMT - 2013
Hints
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