JEE Main 2016Chemistrys Block ElementsMediumMCQ

JEE Main 2016s Block Elements Question with Solution

JEE Main 2016 (03 Apr)

Question

The main oxides formed on combustion of Li, Na and K in excess of air are respectively:

Choose an option

Show full solutionCorrect option: B
Correct answer
BLi2O, Na2O2 and KO2

Step-by-step explanation

In 1A group

Li on reaction with excess air

4Li+O22Li2O

Na on reaction with excess air

2Na+O2Na2O2

K on reaction with excess air

K+O2KO2

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About this question

This is a previous-year question from JEE Main 2016, 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.