Select Chapter Topics:
Q. No.Which of the following statements are true?
Choose the correct answer from the options given below:
| A. | Unlike Ga that has a very high melting point, Cs has a very low melting point. |
| B. | On Pauling scale, the electronegativity values of N and Cl are not the same. |
| C. | \(Ar, K^+, Cl^-, Ca^{2+}\) and \(S^{2-}\) are all isoelectronic species. |
| D. | The correct order of the first ionization enthalpies of Na, Mg, Al, and Si is Si > Al > Mg > Na |
| E. | The atomic radius of Cs is greater than that of Li and Rb. |
| 1. | C and D only |
| 2. | A, C and E only |
| 3. | A, B and E only |
| 4. | C and E only |
Subtopic: Ionization Energy (IE) | Electronegativity |
52%
Level 3: 35%-60%
NEET - 2025
Please attempt this question first.
Hints
Please attempt this question first.
Which among the following electronic configurations belong to main group elements?
Choose the correct answer from the option given below:
1. D and E only.
2. A, C and D only.
3. B and E only.
4. A and C only.
| A. | \([\mathrm{Ne}] 3 \mathrm{~s}^1\) | B. | \([\mathrm{Ar}] 3d^3 \mathrm{~4s}^2\) |
| C. | \([\mathrm{Kr}] 4 \mathrm{~d}^{10} 5 \mathrm{~s}^2 5 \mathrm{p}^5\) | D. | \([\mathrm{Ar}] 3 \mathrm{~d}^{10} 4 \mathrm{~s}^1\) |
| E. | \(\mathrm{[R n] }5 f^0 6 d^2 7 s^2\) | ||
1. D and E only.
2. A, C and D only.
3. B and E only.
4. A and C only.
Subtopic: Modern Periodic Table & Periodicity |
58%
Level 3: 35%-60%
NEET - 2025
Please attempt this question first.
Hints
Please attempt this question first.
Arrange the elements Li, Be, B, C, and N in increasing order of their first ionization enthalpies:
| 1. | Li < B < Be < C < N | 2. | Li < Be < C < B < N |
| 3. | Li < Be < N < B < C | 4. | Li < Be < B < C < N |
Subtopic: Ionization Energy (IE) |
75%
Level 2: 60%+
NEET - 2024
Hints
Arrange the following elements in increasing order of electronegativity N, O, F, C, Si.
Choose the correct answer from the options given below:
Choose the correct answer from the options given below:
| 1. | Si < C < O < N < F | 2. | O < F < N < C < Si |
| 3. | F < O < N < C < Si | 4. | Si < C < N < O < F |
Subtopic: Electronegativity |
78%
Level 2: 60%+
NEET - 2024
Hints
Identify the incorrect statement:
| 1. | The oxidation state and coordination number (or covalency) of \(\mathrm{Al}\) in\( \left[\mathrm{AlCl}\left(\mathrm{{H}_2 {O}}\right)_5\right]^{2+} \) are +3 and 6, respectively. |
| 2. | \(\mathrm{Na}_2 \mathrm{O}\) is a basic oxide and \(\mathrm{Cl}_2 \mathrm{O}_7\) is an acidic oxide |
| 3. | The following four species are called isoelectronic species: \( \mathrm{O}^{2-}, \mathrm{F}^{-}, \mathrm{Na}^{+} \mathrm{and}~ \mathrm{Mg}^{2+}\) |
| 4. | Among the four species \(\mathrm{Mg}, \mathrm{Al}, \mathrm{Mg}^{2+}\) and \(\mathrm{A l^{3+},}\) the smallest one is \(\mathrm{Al}.\) |
Subtopic: Ionization Energy (IE) |
80%
Level 1: 80%+
NEET - 2024
Hints
Match List-I with List-II :
Choose the correct answer from the options given below:
| List-I (IUPAC official name) |
List-II (IUPAC Symbol) |
||
| A. | Mendelevium | I. | Mt |
| B. | Meitnerium | II. | Mc |
| C. | Moscovium | III. | No |
| D. | Nobelium | IV. | Md |
| 1. | A-III, B-I, C-II, D-IV | 2. | A-IV, B-II, C-I, D-III |
| 3. | A-IV, B-I, C-II, D-III | 4. | A-I, B-IV, C-II, D-III |
Subtopic: Modern Periodic Table & Periodicity |
92%
Level 1: 80%+
NEET - 2024
Hints
The correct decreasing order of atomic radii (pm) of Li, Be, B and C is:
1. Be > Li > B > C
2. Li > Be > B > C
3. C > B > Be > Li
4. Li > C > Be > B
1. Be > Li > B > C
2. Li > Be > B > C
3. C > B > Be > Li
4. Li > C > Be > B
Subtopic: Atomic Size |
82%
Level 1: 80%+
NEET - 2024
Hints
Match List-I with List-II
Choose the correct answer from the options given below:
1. A-I, B-II, C-IV, D-III
2. A-I, B-IV, C-III, D-II
3. A-I, B-IV, C-II, D-III
4. A-IV, B-I, C-II, D-III
| List-I (Block/group in periodic table) |
List-II (Element) |
||
| A. | Lanthanoid | I. | Ce |
| B. | d-Block element | II. | As |
| C. | p-Block element | III. | Cs |
| D. | s-Block element | IV. | Mn |
1. A-I, B-II, C-IV, D-III
2. A-I, B-IV, C-III, D-II
3. A-I, B-IV, C-II, D-III
4. A-IV, B-I, C-II, D-III
Subtopic: Modern Periodic Table & Periodicity |
85%
Level 1: 80%+
NEET - 2024
Hints
The element expected to form the largest ion to achieve the nearest noble gas configuration is:
| 1. | Sodium(Na) | 2. | Oxygen(O) |
| 3. | Fluorine(F) | 4. | Nitrogen(N) |
Subtopic: Atomic Size |
57%
Level 3: 35%-60%
NEET - 2023
Hints
Which one of the following represents all isoelectronic species?
1. \(\mathrm{Na^+ , Cl^-, O^- , NO^+}\)
2. \(\mathrm{N_2O, N_2O_4 , NO^+, NO}\)
3. \(\mathrm{Na^+ , Mg^{2+} , O^- , F^-}\)
4. \(\mathrm{Ca^{2+} , Ar, K^+, Cl^-}\)
1. \(\mathrm{Na^+ , Cl^-, O^- , NO^+}\)
2. \(\mathrm{N_2O, N_2O_4 , NO^+, NO}\)
3. \(\mathrm{Na^+ , Mg^{2+} , O^- , F^-}\)
4. \(\mathrm{Ca^{2+} , Ar, K^+, Cl^-}\)
Subtopic: Ionization Energy (IE) |
76%
Level 2: 60%+
NEET - 2023
Hints
Select Chapter Topics:
© 2025 GoodEd Technologies Pvt. Ltd.