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Q. No.Subtopic: d-Block Elements- Properties & Uses |
67%
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Among the following, which are amphoteric oxides?
1. V2O5, Cr2O3
2. Mn2O7, CrO3
3. CrO, V2O5
4. V2O5, V2O4
Subtopic: d-Block Elements- Properties & Uses |
76%
From NCERT
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The correct value of the spin-only magnetic moment of ion is equal to:
| 1. | 2.87 BM | 2. | 3.87 BM |
| 3. | 3.47 BM | 4. | 3.57 BM |
Subtopic: d-Block Elements- Properties & Uses |
79%
From NCERT
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Which of the following statements is false?
| 1. | Copper liberates hydrogen from acids. |
| 2. | In its higher oxidation states, manganese forms stable compounds with oxygen and fluorine. |
| 3. | Mn3+, and Co3+ are oxidizing agents in an aqueous solution. |
| 4. | Ti2+, and Cr2+ are reducing agents in an aqueous solution. |
Subtopic: d-Block Elements- Properties & Uses |
70%
From NCERT
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Highest oxidation state of manganese in fluoride is +4 (Mn) but the highest oxidation state in oxides is +7 (Mn2O7). The reason is :
| 1. | Fluorine is more electronegative than oxygen. |
| 2. | Fluorine does not possess d orbitals. |
| 3. | Fluorine stabilizes lower oxidation state of Mn. |
| 4. | In covalent compounds, fluorine can only form a single bond while oxygen forms a double bond. |
Subtopic: Chemistry of Mn and Cr Compounds |
71%
From NCERT
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Which of the following compounds cannot act as an oxidising agent?
| 1. | \(\mathrm{CrO}_3 \) | 2. | \(\mathrm{CrO}_4^{2-} \) |
| 3. | \(\mathrm{WO}_3\) | 4. | Both 1 and 2 |
Subtopic: d-Block Elements- Properties & Uses | f-Block Elements- Properties & Uses |
63%
From NCERT
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Match the properties given in Column I with the metals given in Column II:
| Column I - (Property) | Column II - (Metal) | ||
| A. | Element with highest second ionisation enthalpy | 1. | V |
| B. | Element with highest third ionisation enthalpy | 2. | Cr |
| C. | M in M(CO)6 is | 3. | Cu |
| D. | Element with the highest heat of atomisation | 4. | Zn |
| A | B | C | D | |
| 1. | 3 | 4 | 1 | 2 |
| 2. | 3 | 4 | 2 | 1 |
| 3. | 1 | 2 | 4 | 3 |
| 4. | 3 | 2 | 4 | 1 |
Subtopic: d-Block Elements- Properties & Uses |
58%
From NCERT
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Which of the following statements is true?
| 1. | Cu(II)aq is more stable. |
| 2. | Cu(II)aq is less stable. |
| 3. | Cu(I) and Cu(II) are equally stable. |
| 4. | Stability of Cu(I) and Cu(II) depends on nature of copper salts. |
Subtopic: d-Block Elements- Properties & Uses |
74%
From NCERT
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Based on the metallic radii provided, which transition element exhibits the highest density?
| Element | Fe | Co | Ti | Cu |
| Metallic radii/pm | 126 | 125 | 147 | 128 |
1. Fe
2. Ti
3. Co
4. Cu
Subtopic: d-Block Elements- Properties & Uses |
66%
From NCERT
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Electronic configuration of a transition element X in +3 oxidation state is [Ar]3d5: Atomic number for the element X is :
1. 25
2. 26
3. 27
4. 24
Subtopic: d-Block Elements- Properties & Uses |
82%
From NCERT
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