Which of the following statement is incorrect?

Options

A. Diazonium salts are crystalline solids
B. They are unstable and explode in dry state
C. Aromatic diazonium salts are less stable than aliphatic diazonium salts
D. These are readily soluble in water

Answer

To determine which statement is incorrect regarding diazonium salts, we will analyze each statement one by one.

### Step 1: Analyze the First Statement
**Statement 1:** "Diazonium salts are crystalline solids."

- **Analysis:** Diazonium salts are indeed known to be crystalline and often colorless. They can form crystals when cooled to low temperatures. Therefore, this statement is **correct**.

### Step 2: Analyze the Second Statement
**Statement 2:** "They are unstable and explode in dry state."

- **Analysis:** Diazonium salts are known to be unstable, especially in their dry state. They can decompose and release nitrogen gas when they are completely dry. This statement is also **correct**.

### Step 3: Analyze the Third Statement
**Statement 3:** "These are readily soluble in water."

- **Analysis:** Diazonium salts are polar compounds due to the presence of the diazonium group, which makes them soluble in water. Therefore, this statement is **correct**.

### Step 4: Analyze the Fourth Statement
**Statement 4:** "Aromatic diazonium salts are less stable than aliphatic salts."

- **Analysis:** This statement is incorrect. Aromatic diazonium salts are generally more stable than aliphatic diazonium salts due to resonance stabilization provided by the aromatic ring. Aliphatic diazonium salts lack this stabilization and are therefore less stable. Thus, this statement is **incorrect**.

### Conclusion
The incorrect statement is: **"Aromatic diazonium salts are less stable than aliphatic salts."**

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