Q. No.Match List-I with List-II:
Choose the correct answer from the options given below :
1. A-III, B-IV, C-I, D-II
2. A-II, B-I, C-IV, D-III
3. A-IV, B-I, C-III, D-II
4. A-III, B-I, C-IV, D-II
| List-I (Transition metal/compound/complex) |
List-II (Catalytic Role) |
||
| (a) | \(V_2O_5\) | (i) | Preparation of ammonia from \(N_2/H_2\) mixture |
| (b) | \(Fe\) | (ii) | Polymerisation of alkynes |
| (c) | \(PdCl_2\) | (iii) | Preparation of \(H_2SO_4\) from \(SO_2\) |
| (d) | \(Ni \) complex | (iv) | Oxidation of ethyne to ethanal |
Choose the correct answer from the options given below :
1. A-III, B-IV, C-I, D-II
2. A-II, B-I, C-IV, D-III
3. A-IV, B-I, C-III, D-II
4. A-III, B-I, C-IV, D-II
Subtopic: d-Block Elements- Properties & Uses |
60%
Level 2: 60%+
NEET - 2026
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The calculated 'spin-only' magnetic moment of \(\text{Ti}^{2+}(3d^2) \) is :
1. 2.84 BM
2. 5.92 BM
3. 4.90 BM
4. 3.87 BM
1. 2.84 BM
2. 5.92 BM
3. 4.90 BM
4. 3.87 BM
Subtopic: d-Block Elements- Properties & Uses |
75%
Level 2: 60%+
NEET - 2026
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Although +3 oxidation state is most common in lanthanoids, cerium still shows +4 oxidation state because :
| 1. | Its nearest inert gas is Radon. |
| 2. | After losing one more electron, it acquires \(4f^{14}\) electronic configuration. |
| 3. | Its atomic number is 61. |
| 4. | After losing one more electron, it acquires \(4f^0\) electronic configuration. |
Subtopic: d-Block Elements- Properties & Uses | f-Block Elements- Properties & Uses |
64%
Level 2: 60%+
NEET - 2026
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Given below are two statements :
In the light of the above statements, choose the correct answer from the options given below:
| Statement I: | Ferromagnetism is considered as an extreme form of paramagnetism. |
| Statement II: | The number of unpaired electrons in a \(Cr^{2+}\)ion (Z = 24) is the same as that of a \(Nd^{3+}\) ion (Z = 60). |
| 1. | Statement I is True but Statement II is False. |
| 2. | Statement I is False but Statement II is True. |
| 3. | Both Statement I and Statement II are True. |
| 4. | Both Statement I and Statement II are False. |
Subtopic: d-Block Elements- Properties & Uses | f-Block Elements- Properties & Uses |
55%
Level 3: 35%-60%
NEET - 2025
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The E° value for the Mn3+/Mn2+ couple is more positive than that of Cr3+/Cr2+ or Fe3+/Fe2+ due to change of:
| 1. | d5 to d2 configuration | 2. | d4 to d5 configuration |
| 3. | d3 to d5 configuration | 4. | d5 to d4 configuration |
Subtopic: d-Block Elements- Properties & Uses |
71%
Level 2: 60%+
NEET - 2024
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Which of the following ions have the same 'spin-only' magnetic moment?
| A. | Ti+3 | B. | Cr2+ |
| C. | Mn2+ | D. | Fe2+ |
| E. | Sc3+ | ||
Choose the most appropriate answer from the options given below:
| 1. | A and E only | 2. | B and C only |
| 3. | A and D only | 4. | B and D only |
Subtopic: d-Block Elements- Properties & Uses |
65%
Level 2: 60%+
NEET - 2024
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Match List-I with List-II
Choose the correct answer from the options given below:
| List-I (Element) |
List-II (Most Common oxidation state/s) |
||
| A. | \(\mathrm{Fe}\) | I. | +2, +7 |
| B. | V | II. | +3, +2 |
| C. | \(\mathrm{Mn}\) | III. | +4 |
| D. | \(\mathrm{Ti}\) | IV. | +5 |
| 1. | A-II, B-IV, C-I, D-III | 2. | A-IV, B-II, C-I, D-III |
| 3. | A-II, B-I, C-IV, D-III | 4. | A-I, B-IV, C-II, D-III |
Subtopic: d-Block Elements- Properties & Uses |
82%
Level 1: 80%+
NEET - 2024
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Which of the following pairs of ions will have the same spin only magnetic moment values within the pair?
A. \(\mathrm{Zn ^{2+}, Ti ^{2+}}\)
B. \(\mathrm{Cr ^{2+}, Fe ^{2+}}\)
C. \(\mathrm{Ti ^{3+}, Cu ^{2+}}\)
D. \(\mathrm{V ^{2+}, Cu ^{+}}\)
Choose the correct answer from the options given below:
A. \(\mathrm{Zn ^{2+}, Ti ^{2+}}\)
B. \(\mathrm{Cr ^{2+}, Fe ^{2+}}\)
C. \(\mathrm{Ti ^{3+}, Cu ^{2+}}\)
D. \(\mathrm{V ^{2+}, Cu ^{+}}\)
Choose the correct answer from the options given below:
| 1. | C and D only | 2. | A and D only |
| 3. | A and B only | 4. | B and C only |
Subtopic: d-Block Elements- Properties & Uses |
72%
Level 2: 60%+
NEET - 2024
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Which of the following set of ions act as oxidizing agents?
| 1. | \(\mathrm{Ce}^{4+} \) and \(\mathrm{Tb}^{4+}\) | 2. | \(\mathrm{La}^{3+} \) and \(\mathrm{Lu}^{3+}\) |
| 3. | \(\mathrm{Eu}^{2+} \) and \(\mathrm{Yb}^{2+}\) | 4. | \(\mathrm{Eu}^{2+} \) and \(\mathrm{Tb}^{4+}\) |
Subtopic: d-Block Elements- Properties & Uses |
70%
Level 2: 60%+
NEET - 2024
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The stability of Cu2+ is greater than that of Cu+ salts in an aqueous solution due to:
1. Second ionisation enthalpy
2. First ionisation enthalpy
3. Enthalpy of atomization
4. Hydration energy
1. Second ionisation enthalpy
2. First ionisation enthalpy
3. Enthalpy of atomization
4. Hydration energy
Subtopic: d-Block Elements- Properties & Uses |
73%
Level 2: 60%+
NEET - 2023
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