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Q. No.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
Urea reacts with water to form A which will decompose to form B. B when passed through \(\left(Cu\right)^{2 +}\) (aq), deep blue colour solution C is formed. What is the formula of C from the following?
| 1. | \(\left[Cu \left(NH_{3}\right)_{4}\right]^{2 +}\) | 2. | \(Cu \left(\right. OH \left.\right)_{2}\) |
| 3. | \(CuCO_{3} . Cu (OH)_{2}\) | 4. | \(CuSO_{4}\) |
Subtopic: d-Block Elements- Properties & Uses |
69%
Level 2: 60%+
NEET - 2020
Hints
Match the following aspects with the respective metal.
| Aspects | Metal | ||
| (a) | The metal which reveals the maximum number of oxidation states | (i) | Scandium |
| (b) | The metal although placed in a 3d block is not considered as a transition element | (ii) | Copper |
| (c) | The metal which does not exhibit variable oxidation states | (iii) | Manganese |
| (d) | The metal which in +1 oxidation state in aqueous solution undergoes disproportionation | (iv) | Zinc |
Select the correct option:
| Options: | (a) | (b) | (c) | (d) |
| 1. | (i) | (iv) | (ii) | (iii) |
| 2. | (iii) | (iv) | (i) | (ii) |
| 3. | (iii) | (i) | (iv) | (ii) |
| 4. | (ii) | (iv) | (i) | (iii) |
Subtopic: d-Block Elements- Properties & Uses |
85%
Level 1: 80%+
NEET - 2020
Hints
Zr (Z = 40) and Hf (Z = 72) have similar atomic and ionic radii because of:
| 1. | Lanthanoid contraction |
| 2. | Having similar chemical properties |
| 3. | Belonging to the same group |
| 4. | Diagonal relationship |
Subtopic: d-Block Elements- Properties & Uses | Lanthanoid & Actinoids Contraction |
89%
Level 1: 80%+
NEET - 2021
Hints
Match the statements given in List-I with the corresponding element given in List-II:
| List-I (Characteristics) |
List-II (Elements) |
||
| (a) | Element that exhibits +3 oxidation state only. | (i) | Mn |
| (b) | An element that exhibits more number of oxidation states. | (ii) | Zn |
| (c) | Element which is a reducing agent in its +2 oxidation state. | (iii) | Sc |
| (d) | An element that is not considered as a transition element. | (iv) | Cr |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (iii) | (iv) | (i) | (ii) |
| 2. | (iv) | (i) | (ii) | (iii) |
| 3. | (ii) | (iv) | (iii) | (i) |
| 4. | (iii) | (i) | (iv) | (ii) |
Subtopic: d-Block Elements- Properties & Uses |
84%
Level 1: 80%+
NEET - 2022
Hints
Identify the pair of Lanthanoides with one strong oxidant and one strong reductant:
| 1. | Ce(IV), Tb(IV) | 2. | Yb(II), Eu(II) |
| 3. | Eu(IV), Lu(III) | 4. | Ce(IV), Eu(II) |
Subtopic: d-Block Elements- Properties & Uses |
72%
Level 2: 60%+
NEET - 2022
Hints
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
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
Hints
The outer electronic configuration of Gd:
( At. No. 64)
1. 4f5 5d4 6s1
2. 4f7 5d1 6s2
3. 4f3 5d5 6s2
4. 4f4 5d5 6s1
( At. No. 64)
1. 4f5 5d4 6s1
2. 4f7 5d1 6s2
3. 4f3 5d5 6s2
4. 4f4 5d5 6s1
Subtopic: f-Block Elements- Properties & Uses |
90%
Level 1: 80%+
NEET - 2013
Hints
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)
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 |
91%
Level 1: 80%+
NEET - 2015
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