Yellow dye can be prepared by a coupling reaction of benzene diazonium chloride in acid medium with x. Identify X from the following

Options

A. Aniline
B. Phenol
C. Cumene
D. Benzene

Answer

To solve the question of identifying the compound X that can react with benzene diazonium chloride in an acidic medium to form a yellow dye, we can follow these steps:

### Step 1: Understand the Reaction
Benzene diazonium chloride (C6H5N2Cl) is a diazonium salt that can undergo a coupling reaction with various nucleophiles. In an acidic medium, it typically reacts with compounds that have an electron-donating group, such as an amino group (-NH2) or a hydroxyl group (-OH).

**Hint:** Look for compounds that can act as nucleophiles in the reaction.

### Step 2: Identify Potential Candidates for X
The common candidates for X in coupling reactions with diazonium salts are:
1. Aniline (C6H5NH2)
2. Phenol (C6H5OH)
3. Other aromatic compounds with electron-donating groups.

**Hint:** Focus on compounds that have a strong nucleophilic character.

### Step 3: Analyze the Options
Now, we need to analyze the given options to see which one can effectively couple with benzene diazonium chloride to produce a yellow dye.

- **Option 1: Aniline (C6H5NH2)** - This compound has an amino group that can easily couple with the diazonium salt.
- **Option 2: Phenol (C6H5OH)** - This compound has a hydroxyl group that can also couple with the diazonium salt.
- **Option 3 and 4:** (Assuming these are other compounds not specified in the question)

**Hint:** Consider the reactivity of each compound with the diazonium salt.

### Step 4: Determine the Product
When benzene diazonium chloride reacts with aniline or phenol in an acidic medium, it forms a colored azo compound, which is typically yellow.

- **With Aniline:** The product will be an azo compound that is yellow.
- **With Phenol:** The product will also be a yellow azo compound.

**Hint:** The color of the product can help confirm the identity of the coupling partner.

### Conclusion
Based on the analysis, the most likely candidates for X that can react with benzene diazonium chloride to produce a yellow dye are aniline and phenol. However, since the question asks for a specific compound X, the best answer here is:

**X = Aniline (C6H5NH2)**

### Summary of Steps:
1. Understand the reaction type (coupling reaction).
2. Identify potential candidates for X (nucleophiles).
3. Analyze the options provided.
4. Determine the product formed from the reaction.