`CH_(3)-overset(CH_(3))overset(|)(CH)-NO_(2) underset(at 0^(@)C)overset(NaNO_(2)+H_(2)SO_(4))(rarr)(A)`. `(A)` is:

Options

A. a.`(CH_(3))_(2)-CH-OH`
B. b.`(CH_(3))_(2)CH-N=N-Br`
C. c.`(CH_(3))_(2)underset(NO_(2))underset(|)(C)-N=O`
D. d.`(CH_(3))_(2)underset(NO_(2))underset(|)(C )-NHOH`

Explanation

To solve the given question, we need to analyze the reaction of the compound CH₃-CH(CH₃)-NO₂ with the reagents NaNO₂ and H₂SO₄ at 0°C. Here’s a step-by-step breakdown of the reaction:

### Step 1: Identify the Reactants
The reactant is CH₃-CH(CH₃)-NO₂, which is a nitroalkane. The reagents are sodium nitrite (NaNO₂) and sulfuric acid (H₂SO₄).

### Step 2: Understand the Reaction Conditions
The reaction takes place at 0°C, which is important for controlling the reaction pathway. The combination of NaNO₂ and H₂SO₄ will generate nitrous acid (HNO₂).

### Step 3: Generate HNO₂
When NaNO₂ reacts with H₂SO₄, it produces nitrous acid:
\[ \text{NaNO}_2 + \text{H}_2\text{SO}_4 \rightarrow \text{HNO}_2 + \text{NaHSO}_4 \]

### Step 4: Reaction of Nitroalkane with HNO₂
The nitro group (NO₂) in the compound will react with nitrous acid (HNO₂). This reaction typically leads to the formation of a diazonium compound. However, since we have a secondary amine structure here, the nitro group will be converted to a hydroxylamine structure.

### Step 5: Elimination of Water
The hydroxylamine structure can undergo dehydration (loss of water) to form a double bond with nitrogen:
\[ \text{R-NO}_2 \rightarrow \text{R-N=O} + \text{H}_2\text{O} \]

### Step 6: Identify the Final Product
The final product formed is a compound known as pseudonitrol or nitroso compound. The structure can be represented as:
\[ \text{CH}_3-CH(CH_3)-N=O \]

### Step 7: Confirm the Product
The product can be confirmed by its structure, which is consistent with the expected outcome of the reaction. The final product is:
\[ \text{Pseudonitrol} \]

### Conclusion
The final product (A) formed from the reaction is:
\[ \text{A} = \text{CH}_3-CH(CH_3)-N=O \]

### Answer
The answer is option C, which corresponds to the structure of the product formed.

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