Arrange the following in increasing order of acidic character:
`CrO,Cr_(2)O_3 and CrO_3`.

Explanation

To arrange the oxides of chromium (CrO, Cr₂O₃, and CrO₃) in increasing order of acidic character, we need to consider the oxidation states of chromium in each oxide. The acidic character of metal oxides generally increases with an increase in the oxidation state of the metal.

### Step-by-Step Solution:

1. **Identify the Oxidation States:**
- For **CrO**: Let the oxidation state of Cr be \( x \).
\[
x + (-2) = 0 \implies x = +2
...