Which of the following is a correct statement?:

Options

A. `C_(2)H_(5)`Br reacts with alco. KOH to give `C_(2)H_(5)`OH
B. Reaction of `C_(2)H_(5)` Br with metallic Na gives ethane
C. `C_(2)H_(5)` Br reacts with sodium ethoxide to give ether
D. `C_(2)H_(5)`Br reacts with AgCN to give ethyl cyanide

Answer

To solve the question, we need to analyze each statement regarding the reactions of C2H5-Br (bromoethane) and determine which one is correct.

### Step-by-Step Solution:

1. **Analyze the First Statement:**
- **Statement:** C2H5-Br reacts with alcoholic KOH to give C2H5-OH.
- **Analysis:** When bromoethane reacts with alcoholic KOH, the reaction favors elimination rather than substitution. Alcoholic KOH provides alkoxide ions (RO-) instead of hydroxide ions (OH-), leading to the formation of alkenes (in this case, ethene) rather than alcohols.
- **Conclusion:** This statement is **incorrect**.

2. **Analyze the Second Statement:**
- **Statement:** C2H5-Br reacts with metallic sodium to give ethane.
- **Analysis:** The reaction of bromoethane with sodium metal involves coupling two molecules of bromoethane. This reaction is known as the Wurtz reaction, which produces butane (C4H10) and sodium bromide (NaBr) as products.
- **Conclusion:** This statement is **incorrect**.

3. **Analyze the Third Statement:**
- **Statement:** C2H5-Br reacts with sodium ethoxide to give C2H5O- and C2H5O+.
- **Analysis:** Sodium ethoxide (NaOEt) acts as a nucleophile and can react with bromoethane through a nucleophilic substitution mechanism. The reaction produces diethyl ether (C2H5-O-C2H5) and sodium bromide (NaBr).
- **Conclusion:** This statement is **correct**.

4. **Analyze the Fourth Statement:**
- **Statement:** C2H5-Br reacts with AgCN to give ethyl cyanide.
- **Analysis:** The reaction of bromoethane with silver cyanide (AgCN) does not yield ethyl cyanide (C2H5-CN) due to the covalent character of AgCN. Instead, it produces ethyl isocyanide (C2H5-NC) because the reaction favors the formation of isocyanides due to the covalent nature of the reactants.
- **Conclusion:** This statement is **incorrect**.

### Final Conclusion:
The only correct statement is:
- **C2H5-Br reacts with sodium ethoxide to give ether.**

### Answer:
The correct answer is **C**: C2H5-Br reacts with sodium ethoxide to give ether.

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