Question

Which one of the alkali metals, forms only, the normal oxide, $M_{2}O$ on heating in air ?

• A. K
• B. Li
• C. Na
• D. Rb

Answer 1

Answer: (B)

Lithium (Li) is the alkali metal which forms only normal oxide, $L{i}_{2}O$ when heated in air.
$2Li+1/2O_2\to L{i}_{2}O$