Question

Which one of the following oxide is neutral in nature?

• A. $CO$
• B. $SnO$
• C. $PbO$
• D. $GeO$

Answer 1

The correct option is A $CO$

Any compound whether acidic or basic, is called so as reacts with water and releases $H^{+}$ or OH-.
However , CO doesn't react with water at all and doesn't ionise either(since its covalent.)
$SnO$ and $PbO$ are amphoteric while GeO is acidic in nature.