Question

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

पर्याय

• Rb

• K

• Li

• Na

Answer 1

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.