Identify the correct statement:

$CrO$ is basic, $Cr_2O_3$ is amphoteric, $CrO_3$ is acidic

The correct statement is: (3) $CrO$ is basic, $Cr_2O_3$ is amphoteric, $CrO_3$ is acidic

Here is an explanation for each compound:
$CrO$ (Chromium(II) oxide) is a basic oxide because it contains chromium in the +2 oxidation state, and oxides of metals in lower oxidation states tend to be basic.
$Cr_2O_3$ (Chromium(III) oxide) is amphoteric because it can exhibit both acidic and basic behavior. It can react with both acids and bases, making it amphoteric.
$CrO_3$ (Chromium(VI) oxide) is acidic because it contains chromium in the +6 oxidation state, and oxides of metals in higher oxidation states tend to be acidic.

So, option (3) correctly describes the acidity/basicity properties of these chromium compounds.