JEE Main 2023 — S Block Elements Question with Solution
From: JEE Main 2023 (Online) 11th April Evening Shift
Question
Alkali metal from the following with least melting point is :
Choose an option
Show full solutionCorrect option: D
Step-by-step explanation
The alkali metals are the elements in Group 1 of the periodic table. They are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), and cesium (Cs).
The melting point of these metals decreases down the group as the size of the atoms increases. This is because the metallic bonding weakens as the atomic size increases, resulting in a lower melting point.
Therefore, the alkali metal with the lowest melting point is cesium (Cs).
So, the correct option is Option D, Cs.
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This is a previous-year question from JEE Main 2023, covering the S 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.