f-Block Elements- Properties & Uses Past Year (2006 - 2015) MCQs The d and f Block Elements Chemistry NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

Gadolinium belongs to 4f series. It’s atomic number is 64. Which of the following is the correct electronic configuration of gadolinium?

1. $[X e] 4 f^{8} 6 d^{2}$

2. $[X e] 4 f^{9} 5 s^{1}$

3. $[X e] 4 f^{7} 5 d^{1} 6 s^{2}$

4. $[X e] 4 f^{6} 5 d^{2} 6 s^{2}$

Subtopic: f-Block Elements- Properties & Uses |

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A pair among the following have nearly the same atomic radii:

(Numbers in the parenthesis are atomic numbers).

1. Ti (22) and Zr (40)
2. Zr (40) and Nb (41)
3. Zr (40) and Hf (72)
4. Zr (40) and Ta (73)

Subtopic: f-Block Elements- Properties & Uses | Lanthanoid & Actinoids Contraction |

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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 |

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The outer electronic configuration of Gd:
( At. No. 64)

1. 4f⁵ 5d⁴ 6s¹
2. 4f⁷5d¹ 6s²
3. 4f³ 5d⁵ 6s²
4. 4f⁴ 5d⁵ 6s¹

Subtopic: f-Block Elements- Properties & Uses |

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Actinoids exhibit more number of oxidation states than lanthanoids. It is because of:

1.	The greater metallic character of the lanthanoids than that of the corresponding actinoids.
2.	More energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals.
3.	The lesser energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals.
4.	More active nature of the actinoids.

Subtopic: d-Block Elements- Properties & Uses | f-Block Elements- Properties & Uses | Lanthanoid & Actinoids Contraction |

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Lanthanoid's most common oxidation state is:
1. 2
2. 5
3. 3
4. 4

Subtopic: f-Block Elements- Properties & Uses |

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Actinoids exhibit more oxidation states than lanthanoids. The main reason for this is:

1.	More energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals
2.	Greater metallic character of the lanthanoids than that of the corresponding actinoids
3.	The lesser energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals
4.	More active nature of the actinoids

Subtopic: f-Block Elements- Properties & Uses |

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