What is the major product obtained when 2-bromobutane is heated with alcoholic KOH? Write only the major product expected to be obtained.

Explanation

To determine the major product obtained when 2-bromobutane is heated with alcoholic KOH, we can follow these steps:

### Step 1: Identify the Reactants
The reactant is 2-bromobutane, which has the following structure:
- **2-bromobutane**: CH₃-CH(CH₃)-CH₂-Br

### Step 2: Understand the Reaction Type
When 2-bromobutane is heated with alcoholic KOH, a dehydrohalogenation reaction occurs. This reaction involves the elimination of a hydrogen halide (HBr in this case) from the alkyl halide.
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