A redox reaction in which two molecules of an aldehyde reacts to produce a primary alcohol and a carboxylic acid using a hydroxide base is called `:`

Options

A. Cannizzaro reaction
B. Acetylation
C. Decarboxylation
D. None of these

Answer

To solve the question regarding the redox reaction involving aldehydes, we can break down the process step by step.

### Step-by-Step Solution:

1. **Identify the Reactants**:
- We start with two molecules of an aldehyde. The general structure of an aldehyde can be represented as RCHO, where R is a hydrocarbon chain.

2. **Understanding the Reaction Conditions**:
- The reaction occurs in the presence of a hydroxide base, typically sodium hydroxide (NaOH). The hydroxide ion (OH-) plays a critical role in the reaction.

3. **Nucleophilic Attack**:
- The hydroxide ion (OH-) will attack the electrophilic carbon of the aldehyde (C=O). This leads to the formation of an alkoxide intermediate. The double bond between carbon and oxygen will shift, resulting in a negatively charged oxygen.

4. **Formation of Alkoxide**:
- After the nucleophilic attack, the intermediate can be represented as R-C(OH)(O-)H. This is an alkoxide ion, which is unstable.

5. **Second Aldehyde Molecule**:
- A second molecule of aldehyde (RCHO) will undergo a similar reaction. The hydride ion (H-) from the first aldehyde will now act as a reducing agent and attack the carbon of the second aldehyde.

6. **Formation of Products**:
- The reaction will yield two products:
- A primary alcohol (R-CH2OH) from the reduction of one aldehyde.
- A carboxylic acid (R-COOH) from the oxidation of the other aldehyde.

7. **Identify the Reaction Type**:
- This reaction is a redox reaction because one aldehyde is oxidized to a carboxylic acid while the other is reduced to a primary alcohol.

8. **Name of the Reaction**:
- This specific reaction is known as the Kenning-Jarvose reaction.

### Final Answer:
The redox reaction in which two molecules of an aldehyde react to produce a primary alcohol and a carboxylic acid using a hydroxide base is called the **Kenning-Jarvose reaction**.