Question

The element that does NOT form acidic oxide is :

• A. carbon
• B. phosphorus
• C. chlorine
• D. barium

Answer 1

The correct option is D barium

The element that does NOT form acidic oxide is $Barium$.
$Barium$ is an alkaline earth metal. It forms basic oxide $BaO$.
$Carbon$ forms $C{O}_2$ which is acidic oxide.

$Phosphorus$ forms $P_2{O}_3$ and $P_2{O}_5$ which are acidic oxides.
$Chlorine$ forms $C{l}_2{O}_7$ and other oxides which are acidic oxides.