Question

Which among the given options form an acidic oxide?

• A. $Na$
• B. $K$
• C. $P$
• D. $Mg$

Answer 1

The correct option is C $P$

The nature of oxides can be determined by the type of element involved.
Non Metals form acidic oxides.
Among the options given, $Na$ and $K$ are metals. So, they form basic oxides and silicon is a metalloid. $P$ is a non-metal. Hence, it can form acidic oxide.