Distinction between pairs of compounds
Ethyl cyanide `(CH_(3)CH_(2)CN)` and ethyl isocyanide `(CH_(3)CH_(2)Noverset(=)rarrC)`

Explanation

To distinguish between ethyl cyanide `(CH₃CH₂CN)` and ethyl isocyanide `(CH₃CH₂NC)`, we can use hydrolysis tests and the Tollens test. Here’s a step-by-step breakdown of the distinction:

### Step 1: Understand the Structures
- **Ethyl Cyanide (CH₃CH₂CN)**: This compound has a cyano group (-C≡N) attached to the ethyl group.
- **Ethyl Isocyanide (CH₃CH₂NC)**: This compound has an isocyanide group (-N≡C) attached to the ethyl group.

### Step 2: Hydrolysis of Ethyl Isocyanide
- When ethyl isocyanide undergoes hydrolysis in the presence of hydrochloric acid (HCl), it produces:
...