Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Reason of lanthanoid contraction is
A
negligible screening effect of 
’‐orbitals
’‐orbitals
B
increasing nuclear charge
C
decreasing nuclear charge
D
decreasing screening effect.
Text Solution
Verified by ExpertsThe correct answer is:
A
Due to poor shielding effect of 
‐ orbitals, nucleus will exert a strong attraction and size of atom or ion goes on decreasing as move in the series with increase in atomic number.
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
The manganate and permanganate ions are tetrahedral, due to
Match the catalyst with the process:
Catalyst Process(i) (p) The oxidation of ethyne to ethanal(ii)…
When neutral or faintly alkaline is treated with potassium iodide, iodide ion is converted into ‘ …
Which one of the following ions exhibits d ‐ d transition and paramagnetism as well?
Match the metal ions given in Column ‐ I with the spin magnetic moments of the ions given in Column…
Name the gas that can readily decolourise acidified solution.