A : Primary alcohol is prepared by the reaction of primary amine with `HNO_(2)` .
R : Dimethyl amine is a primary amine but does not form methyl alcohol with `HNO_(2)` .

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
C. If Assertion is true statement but Reason is false , then mark (3)
D. If both Assertion and Reason are false statements , then mark (4)

Answer

To solve the given question, we need to analyze both the assertion (A) and the reason (R) statements provided.

### Step 1: Analyze the Assertion (A)
The assertion states that "Primary alcohol is prepared by the reaction of primary amine with HNO₂ (nitrous acid)."

- **Explanation**: When a primary amine reacts with nitrous acid, it forms an unstable alkyl diazonium salt, which can then decompose to form a primary alcohol. The general reaction can be represented as:

\[ RNH_2 + HNO_2 \rightarrow R-OH + N_2 + HCl \]

- **Conclusion**: The assertion is true because primary amines do indeed react with nitrous acid to produce primary alcohols.

### Step 2: Analyze the Reason (R)
The reason states that "Dimethyl amine is a primary amine but does not form methyl alcohol with HNO₂."

- **Explanation**: Dimethylamine (CH₃)₂NH is actually a secondary amine, not a primary amine. Secondary amines do not react with nitrous acid to form alcohols in the same way primary amines do. Therefore, the statement that dimethyl amine is a primary amine is incorrect.

- **Conclusion**: The reason is false because dimethylamine is a secondary amine, not a primary amine.

### Step 3: Final Evaluation
- The assertion is true, while the reason is false. Therefore, the correct answer to the question is that the assertion is true, but the reason is false.

### Final Answer
The correct option is: **Assertion is true, but Reason is false.**

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