Which of the statements are correct about the following reactions ?
`MeCHO+[Ag(NH_(3))_(2)]^(o+)+overset(Θ)(OH)+ rarr MeCOO^(Θ)+Ag`

Options

A. The equivalent weight of `MeCHO` is 22.
B. Three moles of `overset(Θ)(OH)` are required in the above reaction.
C. `MeCHO` is an oxidising agent.
D. Reduction of `[Ag(NH_(3))_(2)]^(o+)` occurs.

Explanation

To analyze the given reaction and determine which statements are correct, we can break down the process step by step.

### Step 1: Identify the Reaction
The reaction provided is:
\[ \text{MeCHO} + [\text{Ag(NH}_3)_2]^+ + \text{OH}^- \rightarrow \text{MeCOO}^- + \text{Ag} \]

Here, MeCHO represents an aldehyde (specifically, methyl aldehyde or formaldehyde), and [Ag(NH3)2]+ is a complex of silver that acts as an oxidizing agent.

### Step 2: Determine Oxidation and Reduction
- **Oxidation**: The aldehyde (MeCHO) is oxidized to a carboxylate ion (MeCOO^-).
- **Reduction**: The silver ion (Ag^+) is reduced to metallic silver (Ag).

### Step 3: Balance the Reaction
1. **Balancing Oxygen**:
- The aldehyde has one oxygen, and the carboxylate has two oxygens. To balance the oxygen, we can add one water molecule (H2O) on the reactant side:
\[ \text{MeCHO} + [\text{Ag(NH}_3)_2]^+ + \text{OH}^- + \text{H}_2O \rightarrow \text{MeCOO}^- + \text{Ag} \]

2. **Balancing Hydrogen**:
- In basic medium, we need to add hydroxide ions (OH^-) to balance the hydrogen atoms. For every water molecule added, we add the same number of hydroxide ions to the opposite side.

3. **Balancing Charge**:
- The charges must also be balanced. The left side has a total charge of +1 (from [Ag(NH3)2]+) and the right side has -1 (from MeCOO^-). We can add two electrons (2e^-) to the right side to balance the charges.

### Step 4: Identify the Reducing and Oxidizing Agents
- The substance that gets oxidized (MeCHO) acts as a **reducing agent**.
- The substance that gets reduced ([Ag(NH3)2]+) acts as an **oxidizing agent**.

### Step 5: Evaluate the Statements
1. **Statement A**: The equivalent weight of ethanol is 22.
- This is correct as the equivalent weight is calculated based on the molecular weight divided by the number of electrons transferred.

2. **Statement B**: The oxidation of MeCHO occurs.
- This is correct as MeCHO is oxidized to MeCOO^-.

3. **Statement C**: Ethanol acts as an oxidizing agent.
- This is incorrect because ethanol (MeCHO) is being oxidized, thus it acts as a reducing agent.

4. **Statement D**: The reduction of the silver complex occurs.
- This is correct as silver is reduced from Ag^+ to Ag.

### Conclusion
The correct statements are A, B, and D.