Arrange the given in increasing order of acidic character :
`CrO_(3) ,CrO , Cr_(3) O_(4)`

Explanation

To arrange the compounds CrO₃, CrO, and Cr₃O₄ in increasing order of acidic character, we need to analyze the oxidation states of chromium in each compound and understand how oxidation state affects acidity.

### Step 1: Determine the oxidation state of chromium in each compound.

1. **For CrO₃:**
- Let the oxidation state of Cr be \( x \).
- The oxidation state of oxygen is -2.
- The equation is:
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