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Q. No.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) |
76%
Level 2: 60%+
NEET - 2024
Hints
Which of the following arrangements is correct for increasing order of electronegativity?
| 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: Nature of Compound |
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 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. | \(\mathrm{Ca^{2+} , Ar, K^+, Cl^-}\) |
Subtopic: Ionization Energy (IE) |
77%
Level 2: 60%+
NEET - 2023
Hints
Which of the following pair is correctly matched?
1. Basic oxides - \(\mathrm{In_2O_3 , K_2O , SnO_2}\)
2. Neutral oxides - \(\mathrm{CO, NO_2, N_2O}\)
3. Acidic oxides - \(\mathrm{Mn_2O_7, SO_2, TeO_3}\)
4. Amphoteric oxides -\(\mathrm{BeO , Ga_2O_3 , GeO }\)
1. Basic oxides - \(\mathrm{In_2O_3 , K_2O , SnO_2}\)
2. Neutral oxides - \(\mathrm{CO, NO_2, N_2O}\)
3. Acidic oxides - \(\mathrm{Mn_2O_7, SO_2, TeO_3}\)
4. Amphoteric oxides -\(\mathrm{BeO , Ga_2O_3 , GeO }\)
Subtopic: Nature of Compound |
Level 3: 35%-60%
NEET - 2023
Hints
The correct sequence given below contains neutral, acidic, basic, and amphoteric oxide each, respectively is:
| 1. | NO, ZnO, CO2, CaO | 2. | ZnO, NO, CaO, CO2 |
| 3. | NO, CO2, ZnO, CaO | 4. | NO, CO2, CaO, ZnO |
Subtopic: Nature of Compound |
79%
Level 2: 60%+
NEET - 2023
Hints
The IUPAC name of an element with atomic number 119 is:
1. Ununoctium
2. Ununennium
3. Unnilennium
4. Unununnium
1. Ununoctium
2. Ununennium
3. Unnilennium
4. Unununnium
Subtopic: Modern Periodic Table & Periodicity |
83%
Level 1: 80%+
NEET - 2022
Hints
Match List-I (Elements) with List-II (Atomic radii (pm)):
| List-I Elements |
List-II
Atomic radii (pm)
|
||
| (a) | Oxygen (\(O\)) | (i) | 88 |
| (b) | Carbon (\(C\)) | (ii) | 74 |
| (c) | Boron (\(B\)) | (iii) | 66 |
| (d) | Nitrogen (\(N\)) | (iv) | 77 |
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (i) | (iv) | (iii) |
| 2. | (iv) | (iii) | (ii) | (i) |
| 3. | (i) | (iv) | (iii) | (ii) |
| 4. | (iii) | (iv) | (i) | (ii) |
Subtopic: Atomic Size |
74%
Level 2: 60%+
NEET - 2022
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