Which one of the alkali metals, forms only, the normal oxide, M_2O on heating in air?

JEE Main Chemistry question

Not in JEE Main or NEET syllabus

Which one of the alkali metals, forms only, the normal oxide, on heating in air?

Answer: (A)

Among the alkali metals, only lithium forms exclusively the normal oxide on burning in air, while sodium forms the peroxide and

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Question ID VK-137777