Distinction between pairs of compounds
Phenyl acetaldehyde `(C_(6)H_(5)CH_(2)CHO)` and acetophenone `(C_(6)H_(5)COCH_(3))`
(a) By the use of Tollens' reagent and Fehling solution.
Iodoform Test.

Explanation

To distinguish between phenyl acetaldehyde `(C_(6)H_(5)CH_(2)CHO)` and acetophenone `(C_(6)H_(5)COCH_(3))`, we can use the following tests: Tollens' reagent, Fehling's solution, and the Iodoform test. Here’s a step-by-step explanation of how each test can differentiate these two compounds:

### Step 1: Tollens' Reagent Test
1. **Phenyl Acetaldehyde (C6H5CH2CHO)**: This compound is an aldehyde. When it reacts with Tollens' reagent (Ag(NH3)2+), it gets oxidized to a carboxylate ion (C6H5CH2COO−), and silver ions are reduced to metallic silver, forming a silver mirror on the test tube.

**Reaction**:
\[
C6H5CH2CHO + 2[Ag(NH3)2]^+ \rightarrow C6H5CH2COO^- + 2Ag + 2NH3 + H2O
...