The lanthanide contraction is responsible for the fact that:
1. Zr and Y have about the same radius .
2. Zr and Zn have the same oxidation state.
3. Zr and Hf have about the same atomic radius .
4. Zr and Nb have a similar oxidation state.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe incorrect statement among the following is:
1. | There is a decrease in the radii of the atoms or ions as one proceeds from La to Lu. |
2. | Lanthanoid contraction is the accumulation of successive shrinkages. |
3. | As a result of lanthanoid contraction, the properties of the 4d series of the transition elements have no similarities with the 5d series of elements. |
4. | The shielding power of 4f electrons is quite weak. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe reason for lanthanoid contraction is:
1. Negligible screening effect of 'f' orbitals
2. Increasing nuclear charge
3. Decreasing nuclear charge
4. Decreasing screening effect
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyActinide contraction is
mainly related to:
1. Poor shielding by 5f subshell
2. Extraordinary decrement in Zeff
3. Both (1) and (2)
4. Strong shielding by 5f subshel
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology