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Q. No.The 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 & BiologyThe d-block elements that may not be regarded as transition elements are
| 1. | Mn, Fe, Ni because these have partially filled d-subshell. |
| 2. | Mn, Fe, 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 & BiologyWhat is the electronic configuration of transition elements?
1. (n − 1)d1-10 ns0-2
2. (n − 1)d1-10 ns2
3. nf2 np1-6
4. nd2 np1-6
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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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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAlloy that contains lanthanoid metals is-
1. Mischmetal
2. Permalloy
3. Supermalloy
4. Brass
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyGive below are some atomic numbers:
29, 59, 74, 95, 102, 104
The atomic numbers of the inner transition elements among the above are :
1. 29, 59, 74
2. 59, 95, 102
3. 95, 102, 104
4. 59, 74, 95
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe electronic configuration of the last element of actinoids is
1. Thorium, Th:
2. Lawrencium, Lr:
3. Neptunium, Np:
4. Protactinium, Pa:
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