Name the organic compound prepared by each of the following reaction:
`C_2 H_5 Br underset("(alc and hot)")overset(KOH)to `

Explanation

To solve the question, we need to identify the organic compound formed when ethyl bromide reacts with alcoholic and hot potassium hydroxide (KOH). Let's break down the steps:

### Step-by-Step Solution:

1. **Identify the Reactant**:
The reactant given is ethyl bromide, which has the chemical formula \( C_2H_5Br \). The structure of ethyl bromide can be represented as:
\[
CH_3-CH_2-Br
...