Question

Which one among the following is an acidic oxide?

• A.
  $N{a}_{2}O$
• B.
  CO
• C.
  $C{O}_2$
  
• D.
  $A{I}_2{O}_3$
  

Answer 1

The correct option is C

$C{O}_2$

Carbon dioxide is an acidic oxide, it dissolves in water to form carbonic acid which is acid. carbon dioxide has no hydrogen so it is not an acid itself. but like any non metal oxides Co2 dissolves in water to give an acidic solution.