A mixture of formaldehyde and benzaldehyde on heating with aqueous NaOH solution gives :

Options

A. Benzyl alcohol and sodium formate
B. Sodium benzoate and methyl alcohol
C. Sodium benzoate and sodium formate
D. Benzyl alcohol and methyl alcohol.

Explanation

To solve the question regarding the reaction of a mixture of formaldehyde and benzaldehyde when heated with aqueous NaOH, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The reactants in this case are formaldehyde (HCHO) and benzaldehyde (C6H5CHO).

2. **Understand the Reaction Type**:
- The reaction that occurs between these two aldehydes in the presence of a strong base like NaOH is known as the Cross Cannizzaro Reaction. This reaction typically occurs with aldehydes that do not have alpha-hydrogens.

3. **Write the Reaction**:
- In the Cross Cannizzaro Reaction, one aldehyde is oxidized while the other is reduced. For our case:
- Benzaldehyde (C6H5CHO) will be reduced to benzyl alcohol (C6H5CH2OH).
- Formaldehyde (HCHO) will be oxidized to sodium formate (HCOONa).

4. **Products of the Reaction**:
- The products formed from this reaction are:
- Benzyl alcohol (C6H5CH2OH)
- Sodium formate (HCOONa)

5. **Conclusion**:
- Therefore, when a mixture of formaldehyde and benzaldehyde is heated with aqueous NaOH, the resulting products are benzyl alcohol and sodium formate.

### Final Answer:
The mixture of formaldehyde and benzaldehyde on heating with aqueous NaOH gives benzyl alcohol and sodium formate.

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