Ethyl alcohol is obtained when ethyl chloride is boiled with :

Options

A. alcoholic KOH
B. aqueous KOH
C. water
D. aqueous `KMnO_4`

Explanation

To determine how ethyl alcohol is obtained from ethyl chloride, we will analyze the given options step by step.

### Step-by-Step Solution:

1. **Identify the Reactant**: The reactant we are starting with is ethyl chloride (C2H5Cl), also known as chloroethane.

2. **Examine the Options**:
- **Option 1: Alcoholic KOH**: When ethyl chloride reacts with alcoholic KOH, an elimination reaction occurs (beta-dehydrohalogenation), leading to the formation of ethylene (C2H4) and not ethyl alcohol. Therefore, this option does not yield ethyl alcohol.

- **Option 2: Aqueous KOH**: When ethyl chloride reacts with aqueous KOH, a nucleophilic substitution reaction takes place. The hydroxide ion (OH-) acts as a nucleophile and attacks the carbon atom bonded to the chlorine atom. The chlorine atom leaves as a chloride ion (Cl-), resulting in the formation of ethyl alcohol (C2H5OH). This is the desired result.

- **Option 3: Water**: When ethyl chloride reacts with water, it undergoes hydrolysis, which is similar to the reaction with aqueous KOH. However, the reaction is less efficient, and while it may produce some alcohol, it is not the preferred method for obtaining ethyl alcohol from ethyl chloride.

- **Option 4: Aqueous KMnO4**: When ethyl chloride reacts with KMnO4, it undergoes oxidation, which can lead to the formation of acids or aldehydes, but not alcohol. Thus, this option is also incorrect.

3. **Conclusion**: The best method to obtain ethyl alcohol from ethyl chloride is through the reaction with aqueous KOH, which results in a nucleophilic substitution reaction yielding ethyl alcohol.

### Final Answer:
**Ethyl alcohol is obtained when ethyl chloride is boiled with aqueous KOH.**

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