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Q. No.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 |
56%
Level 3: 35%-60%
NEET - 2025
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Please attempt this question first.
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 |
73%
Level 2: 60%+
NEET - 2024
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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 |
72%
Level 2: 60%+
NEET - 2024
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Which of the following statements is incorrect?
Choose the correct answer from the options given below:
| A. | All the transition metals except scandium form MO oxides which are ionic. |
| B. | The highest oxidation number corresponds to the group number in transition metal oxides is attained in Sc2O3 to Mn2O7. |
| C. | Basic character increases from V2O3 to V2O4 to V2O5. |
| D. | V2O4 dissolves in acids to give VO43-. |
| E. | CrO is basic, but Cr2O3 is amphoteric. |
| 1. | B and C only | 2. | A and E only |
| 3. | B and D only | 4. | C and D only |
Subtopic: d-Block Elements- Properties & Uses |
54%
Level 3: 35%-60%
NEET - 2023
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Given below are two statements:
In light of the above statements, choose the most appropriate answer from the options given below:
| Statement I: | Cr2+ is oxidising agent and Mn3+ is a reducing agent in nature. |
| Statement II: | Sc3+ compounds are repelled by the applied magnetic field. |
| 1. | Both I and II are correct. |
| 2. | Both I and II are incorrect. |
| 3. | I is correct but II is incorrect. |
| 4. | I is incorrect but II is correct. |
Subtopic: d-Block Elements- Properties & Uses |
55%
Level 3: 35%-60%
NEET - 2022
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In the neutral or faintly alkaline medium, \(KMnO_4 \) oxidises iodide into iodate. The change in oxidation state of manganese in this reaction is from:
| 1. | +6 to +5 | 2. | +7 to +4 |
| 3. | +6 to +4 | 4. | +7 to +3 |
Subtopic: d-Block Elements- Properties & Uses |
74%
Level 2: 60%+
NEET - 2022
Hints
Identify the incorrect statement.
| 1. | The transition metals and their compounds are known for their catalytic activity due to their ability to adopt multiple oxidation states and to form complexes. |
| 2. | Interstitial compounds are those that are formed when small atoms like H, C or N are trapped inside the crystal lattices of metals. |
| 3. | The oxidation states of chromium in CrO42– and Cr2O72– are not the same. |
| 4. | Cr2+(d4) is a stronger reducing agent than Fe2+(d6) in water. |
Subtopic: d-Block Elements- Properties & Uses |
78%
Level 2: 60%+
NEET - 2020
Hints
Match the catalyst with the process:
| Catalyst | Process | ||
| (i) | \(V_2O_5\) | (a) | The oxidation of ethylene to ethanal |
| (ii) | \(TiCl_4 + Al(CH_3)_3\) | (b) | Polymerisation of alkynes |
| (iii) | \(PdCl_2\) | (c) | Oxidation of \(SO_2\) in the manufacture of \(H_2SO_4\) |
| (iv) | Nickel complexes | (d) | Polymerisation of ethylene |
Which of the following is the correct matching of Catalyst & Process?
| Options: | (i) | (ii) | (iii) | (iv) |
| 1. | c | d | a | b |
| 2. | a | b | c | d |
| 3. | a | c | b | d |
| 4. | c | a | d | b |
1. (i)-(c), (ii)-(d), (iii)-(a), (iv)-(b)
2. (i)-(a), (ii)-(b), (iii)-(c), (iv)-(d)
3. (i)-(a), (ii)-(n), (iii)-(b), (iv)-(d)
4. (i)-(c), (ii)-(a), (iii)-(d), (iv)-(b)
Subtopic: d-Block Elements- Properties & Uses |
74%
Level 2: 60%+
NEET - 2019
Hints
Which of the following ions displays the d-d transition and paramagnetism?
| 1. | \(\mathrm{CrO}_4^{2-} \) | 2. | \(\mathrm{Cr}_2 \mathrm{O}_7^{2-} \) |
| 3. | \(\mathrm{MnO}_4^{-} \) | 4. | \(\mathrm{MnO}_4^{2-}\) |
Subtopic: d-Block Elements- Properties & Uses |
64%
Level 2: 60%+
NEET - 2018
Hints
Match Column-I with Column-II and mark the most appropriate option:
| Column-I (Metal ion) |
Column-II (Spin magnetic moment) |
||
| A. | Co3+ | i. | √8 B.M. |
| B. | Cr3+ | ii. | √35 B.M. |
| C. | Fe3+ | iii. | √15 B.M. |
| D. | Ni2+ | iv. | √24 B.M. |
| A | B | C | D | |
| 1. | iv | iii | ii | i |
| 2. | i | ii | iii | iv |
| 3. | iv | i | ii | iii |
| 4. | iii | iv | i | ii |
Subtopic: d-Block Elements- Properties & Uses |
77%
Level 2: 60%+
NEET - 2018
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