JEE Main 2020 — S Block Elements Question with Solution
From: JEE Main 2020 (Online) 4th September Morning Slot
Question
On combustion of Li, Na and K in excess of air,
the major oxides formed, respectively, are :
Choose an option
Show full solutionCorrect option: C
Correct answer
CLi2O, Na2O2 and KO2
Step-by-step explanation
4Li + O2 2Li2O
2Na + O2 Na2O2
K + O2 KO2
2Na + O2 Na2O2
K + O2 KO2
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This is a previous-year question from JEE Main 2020, 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.