Arrange the following in increasing order of acid strength :
(i) `CH_(3)CH_(2)CH(Br)COOH` , (ii) `CH_(3)CH(Br)CH_(2)COOH` , (iii) `CH_(3)COOH`

Explanation

To arrange the given compounds in increasing order of acid strength, we need to analyze the influence of substituents on the carboxylic acid group. The compounds we have are:

1. \( CH_3CH_2CH(Br)COOH \) (Compound 1)
2. \( CH_3CH(Br)CH_2COOH \) (Compound 2)
3. \( CH_3COOH \) (Compound 3)

### Step 1: Identify the nature of substituents
- **Compound 1** has a bromine atom (Br) attached to the alpha carbon (the carbon next to the carboxylic acid).
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