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Q. No.
From the following, which is the most basic hydroxide?
1. Ce(OH)3
2. Lu(OH)3
3. Yb(OH)3
4. Tb(OH)3
Subtopic: f-Block Elements- Properties & Uses |
62%
Level 2: 60%+
Hints
The reason for lanthanoid contraction is:
1. Negligible screening effect of 'f' orbitals
2. Increasing nuclear charge
3. Decreasing nuclear charge
4. Decreasing screening effect
Subtopic: Lanthanoid & Actinoids Contraction |
74%
Level 2: 60%+
NEET - 2014
Hints
Links
Find the main reason responsible for actinide contraction.
1. Poor shielding by the 5f subshell
2. Extraordinary decrement in Zeff
3. Both (1) and (2)
4. Strong shielding by the 5f subshell
Subtopic: Lanthanoid & Actinoids Contraction |
60%
Level 2: 60%+
Hints
The ionization potential values of d-block elements as compared to the ionization potential values of f-block elements are:
| 1. | Higher | 2. | Equal |
| 3. | Lower | 4. | Can't compare. |
Subtopic: d-Block Elements- Properties & Uses |
69%
Level 2: 60%+
Hints
Subtopic: d-Block Elements- Properties & Uses | Chemistry of Mn and Cr Compounds |
73%
Level 2: 60%+
NEET - 2017
Hints
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
Hints
Which of the following statements is false?
| 1. | On passing H2S through acidified K2Cr2O7 solution, a milky colour is observed. |
| 2. | Na2Cr2O7 is preferred over K2Cr2O7 in volumetric analysis. |
| 3. | K2Cr2O7 solution in an acidic medium is orange. |
| 4. | K2Cr2O7 solution becomes yellow in increasing the pH beyond 7 |
Subtopic: d-Block Elements- Properties & Uses |
71%
Level 2: 60%+
AIPMT - 2012
Hints
Subtopic: f-Block Elements- Properties & Uses |
88%
Level 1: 80%+
Hints
Which of the following statements is false?
| 1. | V2+ < Cr2+ < Mn2+ < Fe2+ : Paramagnetic behaviour |
| 2. | Ni2+ < Co2+ < Fe2+ < Mn2+ : Ionic size |
| 3. | Co3+ < Fe3+ < Cr3+ < Sc3+ : Stability in aqueous solution |
| 4. | Sc < Ti < Cr < Mn : Number of oxidation states |
Subtopic: d-Block Elements- Properties & Uses |
68%
Level 2: 60%+
Hints
Subtopic: d-Block Elements- Properties & Uses |
90%
Level 1: 80%+
Hints
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