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Q. No.Mn2+ compounds are more stable than Fe2+ compounds towards oxidation in their +3 state because :
| 1. | 3d5 configuration is more stable than 3d6 configuration. |
| 2. | 3d6 configuration is more stable than 3d5 configuration. |
| 3. | 3p5 configuration is less stable than 3p6 configuration. |
| 4. | 3p6 configuration is less stable than 3p5 configuration. |
Subtopic: d-Block Elements- Properties & Uses |
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Transition metals show paramagnetic behaviour due to:
| 1. | Paired electrons in the (n-1) d-orbitals | 2. | Unpaired electrons in the (n-1) d-orbitals |
| 3. | Due to \(d^{10},\) and \(d^{0}\) configuration | 4. | None of the above |
Subtopic: d-Block Elements- Properties & Uses |
93%
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The correct statement(s) about interstitial compounds is/are:
| 1. | Transition elements are large in size and contain multiple interstitial sites. |
| 2. | Transition elements can trap atoms of other elements. |
| 3. | Interstitial compounds are chemically inert. |
| 4. | All of the above. |
Subtopic: d-Block Elements- Properties & Uses |
91%
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An element among the following that exhibits the maximum oxidation state is:
1. Cr
2. Mn
3. Fe
4. V
Subtopic: d-Block Elements- Properties & Uses |
91%
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AIPMT - 2000
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The correct statement(s) regarding the oxidation state of transition elements is/are:
| 1. | The oxidation state can vary from +1 to +7 | 2. | Variable oxidation states are possible. |
| 3. | Both (1) and (2) | 4. | None of the above |
Subtopic: d-Block Elements- Properties & Uses |
91%
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Match the catalysts given in Column I with the processes given in Column II.
| 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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Subtopic: d-Block Elements- Properties & Uses |
90%
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The enthalpy of atomization of transition metals is high due to :
1. High effective nuclear charge
2. A large number of valence electrons
3. Very strong metallic bonds
4. All of the above
Subtopic: d-Block Elements- Properties & Uses |
88%
From NCERT
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Subtopic: d-Block Elements- Properties & Uses |
84%
From NCERT
AIPMT - 2000
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The correct statement(s) about transition elements are:
| 1. | +2, and +3 oxidation states are more common for elements in the first transition series, while higher oxidation states are more common for the heavier elements. |
| 2. | The heavier transition elements form low-spin complexes only. |
| 3. | The atomic sizes of the elements of the first transition series are smaller than those of the heavier elements (elements of 2nd and 3r transition series). |
| 4. | All of the above. |
Subtopic: d-Block Elements- Properties & Uses |
87%
From NCERT
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