In acidic radical conc. `H_(2)SO_(4)` group which radical give's chromyl chloride test.

Explanation

To determine which radical in the acidic radical group of concentrated `H2SO4` gives the chromyl chloride test, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Chromyl Chloride Test**:
The chromyl chloride test is specifically used to identify the presence of chloride ions (Cl⁻) in a sample. This test involves the reaction of chloride ions with potassium dichromate (K2Cr2O7) in the presence of concentrated sulfuric acid (H2SO4).

2. **Setting Up the Reaction**:
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