Ethyl bromide and isopropyl chloride can be distinguished by -

Options

A. Alcoholic `AgNO_(3)`
B. Comparing their colours
C. Burning the compounds on spatula
D. Aqueous KOH solution

Answer

To distinguish between ethyl bromide (C2H5Br) and isopropyl chloride (C3H7Cl), we can perform a reaction with alcoholic silver nitrate (AgNO3). Here’s a step-by-step solution:

### Step 1: Identify the Structures
- **Ethyl Bromide**: The structure is CH3-CH2-Br.
- **Isopropyl Chloride**: The structure is CH3-CH(Cl)-CH3.

### Step 2: React with Alcoholic AgNO3
- When ethyl bromide is reacted with alcoholic AgNO3, it undergoes a nucleophilic substitution reaction. The bromide ion (Br-) is replaced by the nitrate ion (NO3-), leading to the formation of a light yellow precipitate of silver bromide (AgBr).

- For isopropyl chloride, when it is reacted with alcoholic AgNO3, the chloride ion (Cl-) is replaced by the nitrate ion (NO3-), leading to the formation of a white precipitate of silver chloride (AgCl).

### Step 3: Observe the Precipitate
- **Observation for Ethyl Bromide**: A light yellow precipitate (AgBr) is formed.
- **Observation for Isopropyl Chloride**: A white precipitate (AgCl) is formed.

### Conclusion
Based on the color of the precipitate formed when each compound is reacted with alcoholic AgNO3, we can distinguish between ethyl bromide and isopropyl chloride. Ethyl bromide gives a light yellow precipitate, while isopropyl chloride gives a white precipitate.

### Final Answer
Ethyl bromide and isopropyl chloride can be distinguished by their reaction with alcoholic AgNO3, which produces a light yellow precipitate for ethyl bromide and a white precipitate for isopropyl chloride.

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