JEE Main 2019 — d and f Block Elements Question with Solution
JEE Main 2019 (10 Jan Shift 1)
Question
The effect of lanthanoid contraction in the lanthanoid series of elements by and large means
Choose an option
Show full solutionCorrect option: D
Correct answer
Ddecrease in both atomic and ionic radii.
Step-by-step explanation
In lanthanide series, the presence of additional electrons and protons increases the effective nuclear charge. Hence, both atomic and ionic radii decrease.
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This is a previous-year question from JEE Main 2019, 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.