AIPMT PRELIMS2007Chemistry-Inorganic Chemistry
AIPMT PRELIMS 2007 Chemistry Lanthanoid Contraction MCQ Question
Type: MCQ-conceptual-Medium-Class 11
Identify the incorrect statement among the following:
A
Lanthanoid contraction is the accumulation of successive shrinkages.
B
As a result of lanthanoid contraction, the properties of 4d series of the transition elements have no similarities with the 5d series of elements.
C
Shielding power of 4f electrons is quite weak.
D
There is a decrease in the radii of the atoms or ions as one proceeds from La to Lu.
Correct Answer
Option B
Detailed Explanation
Lanthanoid contraction causes the 4d and 5d series to have similar properties, contrary to statement (b). The contraction affects atomic and ionic sizes, but not the similarity in properties.
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