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  • 1(current)
Q. No.
Given below are two statements :
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).
In the light of the above statements, choose the correct answer from the options given below:
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
Please attempt this question first.
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Please attempt this question first.
The common oxidation state shown by actinoids is +3 with the other oxidation states being +4, +3, +6, and +7. Rank the following elements in decreasing order of the number of oxidation states they display:
A. \(Np(Z-93)\) B. \(Am(Z-95)\)
C. \(Ac(Z-89)\) D. \(Pa(Z-91)\)

Choose the correct answer from the options given below:
1. A > B > D > C 2. A > B > C > D
3. B > A > D > C 4. D > B > A > C
Subtopic:  f-Block Elements- Properties & Uses |
 54%
Level 3: 35%-60%
NEET - 2024
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The pair of lanthanoid ions, consisting of elements which are diamagnetic, is:
1. Ce3+ and Eu2+ 2. Gd3+ and Eu3+
3. Pm3+ and Sm3+ 4. Ce4+ and Yb2+
Subtopic:  f-Block Elements- Properties & Uses |
 66%
Level 2: 60%+
NEET - 2024
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Given below are two statements: 
Assertion (A): Ionisation enthalpies of early actinoids are lower than early lanthanoids.
Reason (R): Electrons entering 5f orbitals in actinoids experience greater shielding from the nuclear charge.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. (A) is False but (R) is True.
Subtopic:  f-Block Elements- Properties & Uses |
Level 3: 35%-60%
NEET - 2023
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The incorrect statement among the following is:

1. Lanthanoids are good conductors of heat and electricity.
2. Actinoids are highly reactive metals, especially when finely divided.
3. Actinoid contraction is greater for element to element than Lanthanoid contraction.
4. Most of the trivalent Lanthanoid ions are colourless in the solid-state.
Subtopic:  f-Block Elements- Properties & Uses | Lanthanoid & Actinoids Contraction |
 62%
Level 2: 60%+
NEET - 2021
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The electronic configurations of Eu (Atomic no. 63), Gd (Atomic no. 64), and Tb (Atomic no. 65) are, respectively:
1. [Xe] 4f6 5d1 6s2, [Xe]4f7 5d1 6s2, and [Xe] 4f9 6s2
2. [Xe] 4f6 5d1 6s2, [Xe] 4f75d1 6s2, and [Xe]4f8 5d1 6s2
3. [Xe] 4f7 6s2, [Xe]4f7 5d1 6s2, and [Xe] 4f9 6s2
4. [Xe] 4f7 6s2, (Xe]4f8 6s2, and [Xe]4f8 5d1 6s2
Subtopic:  f-Block Elements- Properties & Uses |
 70%
Level 2: 60%+
NEET - 2016
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Diamagnetic lanthanoid ion among the following is:
(At nos. Ce = 58, Sm = 62, Eu = 63, Yb = 70)
1. Sm2+
2. Eu2+
3. Yb2+
4. Ce2+
Subtopic:  f-Block Elements- Properties & Uses |
 67%
Level 2: 60%+
AIPMT - 2013
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