A primary nitroalkane is treated with nitrous acid,which of the following will be the main product?

Options

A. Pseudonitrol
B. Nitrolic acid
C. A primary amine
D. Primary alcohol

Explanation

To solve the question regarding the reaction of a primary nitroalkane with nitrous acid, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**:
- We have a primary nitroalkane, which can be represented as R-CH2-CH(NO2)- where R is an alkyl group.
- The other reactant is nitrous acid (HNO2).

2. **Understand the Reaction**:
- When a primary nitroalkane is treated with nitrous acid, a dehydration reaction occurs. This means that water (H2O) is eliminated from the reactants.

3. **Write the Reaction**:
- The primary nitroalkane can be represented as R-CH2-NO2.
- Upon treatment with nitrous acid, the reaction can be depicted as:
\[ R-CH2-NO2 + HNO2 \rightarrow R-CH=NOH + H2O + NO2 \]
- Here, H2O is eliminated, resulting in the formation of a compound with a double bond between carbon and nitrogen.

4. **Identify the Product**:
- The product formed from this reaction is known as nitrolic acid, which has the structure R-CH=NOH and retains the nitro group (NO2) on the molecule.

5. **Conclusion**:
- Therefore, the main product of the reaction between a primary nitroalkane and nitrous acid is nitrolic acid.

### Final Answer:
The main product is **nitrolic acid**.