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प्रश्न
Which is a stronger reducing agent, Cr2+ or Fe2+ and why?
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उत्तर
Cr2+ is a stronger reducing agent than Fe2+. In the formation of Cr2+ to Cr3+, the change is d4 to d3, but in the formation of Fe2+ to Fe3+, the change is d6 to d5. In a medium like water, d3 is more stable than d5.
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संबंधित प्रश्न
Why +2 oxidation state of manganese is more stable?
Why do the transition elements have higher enthalpies of atomisation?
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Account for the following:
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What may be the stable oxidation state of the transition element with the following d electron configuration in the ground state of its atom?
3d3
Which one of the following ions is coloured?
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Match List - I with List - II.
| List - I | List - II | ||
| (A) | [Fe(CN)6]3− | (i) | 5.92 BM |
| (B) | [Fe(H2O)6]3+ | (ii) | 0 BM |
| (C) | [Fe(CN)6]4− | (iii) | 4.90 BM |
| (D) | [Fe(H2O)6]2+ | (iv) | 1.73 BM |
Choose the correct answer from the options given below.
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Transition metals and most of their compounds show paramagnetic behaviour.
Give reason for the following statement:
Physical and chemical properties of the 4d and 5d series of the transition elements are quite similar to expected.
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(Round off to the nearest integer).
[Given: `sqrt3 = 1.73, sqrt2 = 1.41`]
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Reason (R): The ability of oxygen to form multiple bonds to metals.
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‘Spin only’ magnetic moment is the same for which of the following ions?
- Ti3+
- Cr2+
- Mn2+
- Fe2+
- Sc3+
Choose the most appropriate answer from the options given below:
