JEE Main 2005 — d and f Block Elements Question with Solution
JEE Main 2005
Question
Which of the following factors may be regarded as the main cause of lanthanide contraction?
Choose an option
Show full solutionCorrect option: A
Correct answer
APoor shielding of one of 4f electron by another in the subshell
Step-by-step explanation
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This is a previous-year question from JEE Main 2005, covering the d and f Block Elements chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.