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Question
Which of the alkali metals form only the normal oxide, M2O on heating in the air?
Options
Rb
K
Li
Na
MCQ
Solution
Li
Explanation:
Li is the alkali metal which forms only normal oxide. i.e., Li2O when heated in air.
\[\ce{2Li + 1/2 O2 -> Li2O}\]
While super-oxide is the main product formed by heavier alkali metal. Peroxide is created when sodium is heated in the air.
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General Characteristics of the Compounds of the Alkali Metals
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