NEET Chemistry
Lanthanoid Actinoids Contraction
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Consistency: 20%
Weightage: 4 / 20 Yrs
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2020 1
2010 1
2007 Questions 4 MCQs
01
PYQ 2007
easy
chemistry ID: neet-200
Identify the incorrect statement among the following:
| 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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02
PYQ 2010
easy
chemistry ID: neet-201
Which of the following ions will exhibit colour in aqueous solutions?
1. La3+ (Z=57)
2. Ti3+ (Z=22)
3. Lu3+ (Z=71)
4. Sc3+ (Z=21)
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03
PYQ 2020
easy
chemistry ID: neet-202
Identify the incorrect statement from the following:
| 1. | Zirconium and Hafnium have identical radii of 160 pm and 159 pm, respectively as a consequence of lanthanoid contraction. |
| 2. | Lanthanoids reveal only +3 oxidation state. |
| 3. | The lanthanoid ions other than the f0 type and the f14 type are all paramagnetic. |
| 4. | The overall decrease in atomic and ionic radii from lanthanum to lutetium is called lanthanoid contraction. |
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04
PYQ 2021
easy
chemistry ID: neet-202
Zr (Z = 40) and Hf (Z = 72) have similar atomic and ionic radii because of:
| 1. | Lanthanoid contraction |
| 2. | Having similar chemical properties |
| 3. | Belonging to the same group |
| 4. | Diagonal relationship |
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