NEET Chemistry The s-Block Elements Questions Solved

NEET - 2012

Which one of the alkali metals, forms only, the normal oxide, M2O on heating in air?

(a) Rb

(b) K

(c) Li

(d) Na

Li is the alkali metal which forms only normal oxide Li2O when heated in air.

    2Li+1/2 O2Li2O

Sodium, when heated in air, forms peroxide while heavier alkali metals form superoxide as the major product.

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