Select the compound in each of the following pairs that can be converted to corresponding alkyl bromide more rapidly on being treated with hydrogen bromide :
l(i) 1-butanol or 2-butanol (ii) 2-methyl-1-butanol or 2-butanol
(iii) 2-methyl-2-butanol or 2-butanol

Explanation

To determine which compound in each pair can be converted to the corresponding alkyl bromide more rapidly when treated with hydrogen bromide (HBr), we need to analyze the stability of the carbocations formed during the reaction. The stability of carbocations follows the order: tertiary > secondary > primary. The more stable the carbocation, the faster the reaction will occur.

### Step-by-Step Solution:

**(i) 1-butanol vs. 2-butanol**

1. **Identify the carbocations formed:**
- 1-butanol (C4H9OH) will form a primary carbocation (C4H9^+).
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