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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. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe +2 oxidation state becomes more stable in the first half of the first-row transition elements with increasing atomic number because:
| 1. | s-Orbital is becoming more and more half-filled. |
| 2. | f-Orbital is becoming more and more half-filled. |
| 3. | d-Orbital is becoming more and more half-filled. |
| 4. | p-Orbital is becoming more and more half-filled. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe 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 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe consequence(s) of lanthanoid contraction is/are :
| 1. | Similarity in the properties of second and third transition series. |
| 2. | Separation of lanthanoids is difficult. |
| 3. | Variation in the basic strength of lanthanide hydroxides. |
| 4. | All of the above. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich d-block elements are not considered transition elements, and why?
| 1. | Mn, Fe, and Ni because these have partially filled d-subshell. |
| 2. | Mn, Fe, and Ni because these have completely filled d-subshell. |
| 3. | Zn, Cd, and Hg because these have completely filled d-subshell. |
| 4. | Zn, Cd, and Hg because these have partially filled d-subshell. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology| 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. | \(n d^2~ n p^{1-6}\) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe different oxidation states exhibited by the lanthanoids are:
| 1. | +2, -3, +4 | 2. | -2, -3, -4 |
| 3. | +2, +3, -4 | 4. | +2, +3, +4 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe "Disproportionation" reaction means that :
| 1. | A relatively less stable oxidation state undergoes an oxidation−reduction reaction. |
| 2. | A relatively more stable oxidation state undergoes an oxidation−reduction reaction. |
| 3. | A relatively less stable oxidation state undergoes a hydrogenation reaction. |
| 4. | A relatively more stable oxidation state undergoes a hydrogenation reaction. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn the 3d series, a metal with a +1 oxidation state is:
| 1. | Mn | 2. | Cu |
| 3. | Fe | 4. | Zn |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe number of unpaired electrons in the gaseous ions are, respectively:
| 1. | 3, 2, 3, and 1 | 2. | 2, 2, 3, and 1 |
| 3. | 4, 3, 2, and 1 | 4. | 1, 2, 3, and 4 |
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