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Q. No.Select the element with the highest second ionization enthalpy from the following options.
1. Mn
2. Fe
3. Cr
4. V
2. Fe
3. Cr
4. V
Subtopic: d-Block Elements- Properties & Uses |
73%
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Match Column I (Catalyst) with Column II (Process), and mark the appropriate option:
| Column I - (Catalyst) | Column II - (Process) | ||
| A. | Ni in the presence of hydrogen | 1. | Contact process |
| B. | Cu2Cl2 | 2. | Vegetable oil to ghee |
| C. | V2O5 | 3. | Sandmeyer reaction |
| D. | Finely divided iron | 4. | Haber's process |
| 5. | Decomposition of KClO3 |
Codes:
| A | B | C | D | |
| 1. | 3 | 4 | 2 | 5 |
| 2. | 2 | 3 | 1 | 4 |
| 3. | 5 | 4 | 3 | 2 |
| 4. | 4 | 5 | 3 | 2 |
Subtopic: d-Block Elements- Properties & Uses |
89%
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Match Compound/element in Column-I with uses in Column-II and select the best match from the codes given:
| Column-I (Compound/element) |
Column-II (Uses) |
||
| A. | Lanthanoid oxide | I. | Petroleum cracking |
| B. | Lanthanoid | II. | Television screen |
| C. | Mischmetal | III. | Lanthanoid metal + iron |
| D. | Mixed oxides of lanthanoids are employed | IV. | Production of iron alloy |
| Options: | A | B | C | D |
| 1. | II | I | IV | III |
| 2. | I | II | III | IV |
| 3. | II | IV | III | I |
| 4. | IV | I | III | II |
Subtopic: Lanthanoid & Actinoids Contraction |
57%
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A pair of ions have the same magnetic moment among the following :
1. \(Cu^{2+}, Ti^{3+}\)
2. \( Ti^{3+}, Ni^{2+}\)
3. \( Ti^{4+}, Cu^{2+}\)
4. \( Mn^{2+}, Cu^{2+}\)
Subtopic: d-Block Elements- Properties & Uses |
82%
From NCERT
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Subtopic: d-Block Elements- Properties & Uses |
89%
From NCERT
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Identify the incorrect statement from the following:
| 1. | Zirconium and Hafnium have identical radii of 160 pm and 159 pm, respectively as a consequence of lanthanoid contraction. |
| 2. | Lanthanoids reveal only +3 oxidation state. |
| 3. | The lanthanoid ions other than the f0 type and the f14 type are all paramagnetic. |
| 4. | The overall decrease in atomic and ionic radii from lanthanum to lutetium is called lanthanoid contraction. |
Subtopic: Lanthanoid & Actinoids Contraction |
70%
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NEET - 2020
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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%
From NCERT
NEET - 2020
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Subtopic: d-Block Elements- Properties & Uses |
86%
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AIPMT - 2000
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The oxo metal anions of the 3d series in which the metal exhibits an oxidation state equal to its group number is /are:
| 1. | 2. | ||
| 3. | 4. | All of these |
Subtopic: d-Block Elements- Properties & Uses |
87%
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What is the electronic configuration of transition elements?
| 1. | \((n-1) d^{1-10} n s^{0-2} \) | 2. | \((n-1) d^{1-10} n s^2 \) |
| 3. | \(n f^2~ n p^{1-6} \) | 4. | \(n d^2~ n p^{1-6}\) |
Subtopic: d-Block Elements- Properties & Uses |
80%
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