Distinction between pairs of compounds
Cyclohexane and Cyclohexene
(a) `Br_(2)` test.
(b) Baeyer's reagent test.

Explanation

To distinguish between cyclohexane and cyclohexene using the Br2 test and Baeyer's reagent test, we can follow these steps:

### Step-by-Step Solution:

**(a) Br2 Test:**

1. **Cyclohexane Reaction with Br2:**
- Cyclohexane (C6H12) is a saturated hydrocarbon, meaning it does not have any double or triple bonds. When cyclohexane is treated with bromine (Br2) in a non-polar solvent like carbon tetrachloride (CCl4), no reaction occurs. Therefore, there is no color change observed.
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