When formaldehyde reacts with a NaOH it gives

Options

A. brown ressinous mass
B. black charred mass
C. sodium formate and methyl alcohol
D. formic acid

Explanation

To solve the question, "When formaldehyde reacts with NaOH, it gives?", we can break down the reaction step-by-step.

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The reactant is formaldehyde (HCHO) and sodium hydroxide (NaOH).

2. **Understand the Reaction**:
- When formaldehyde reacts with NaOH, it undergoes a reaction known as the Cannizzaro reaction. This reaction occurs in the presence of a strong base (like NaOH) and involves the disproportionation of aldehydes that do not have alpha-hydrogens.

3. **Mechanism of the Reaction**:
- The hydroxide ion (OH-) from NaOH attacks the carbonyl carbon of formaldehyde. This results in the formation of a tetrahedral intermediate.
- The intermediate then collapses, leading to the formation of two products: one molecule of sodium formate (HCOONa) and one molecule of methyl alcohol (CH3OH).

4. **Products Formation**:
- The reaction can be summarized as:
\[ 2 \text{HCHO} + \text{NaOH} \rightarrow \text{HCOONa} + \text{CH3OH} \]
- Here, sodium formate (HCOONa) is formed as a salt, and methyl alcohol (CH3OH) is formed as an alcohol.

5. **Conclusion**:
- Therefore, when formaldehyde reacts with NaOH, the products are sodium formate and methyl alcohol.

### Final Answer:
The correct answer is **C. Sodium Formate and Methyl Alcohol**.

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