The compound which is not formed during the dry distillation of mixture of calcium formate and calcium acetate is

Options

A. Propanal
B. Propanone
C. Ethanal
D. Methanal

Explanation

To solve the problem of identifying the compound that is not formed during the dry distillation of a mixture of calcium formate and calcium acetate, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Dry Distillation**:
- Dry distillation involves heating a substance without the presence of water, leading to the decomposition of the substance and the formation of various products.

2. **Identifying the Reactants**:
- The reactants in this case are calcium formate (Ca(HCOO)₂) and calcium acetate (Ca(CH₃COO)₂).

3. **Products of Calcium Formate**:
- When calcium formate undergoes dry distillation, it decomposes to produce formaldehyde (HCHO) and calcium oxide (CaO):
\[ \text{Ca(HCOO)}_2 \rightarrow \text{HCHO} + \text{CaO} \]

4. **Products of Calcium Acetate**:
- Calcium acetate decomposes during dry distillation to produce acetone (CH₃COCH₃) and calcium oxide (CaO):
\[ \text{Ca(CH}_3\text{COO)}_2 \rightarrow \text{CH}_3\text{COCH}_3 + \text{CaO} \]

5. **Combining the Products**:
- From the dry distillation of both calcium formate and calcium acetate, we can expect the formation of:
- Formaldehyde (from calcium formate)
- Acetone (from calcium acetate)

6. **Identifying the Compounds**:
- The question asks for a compound that is NOT formed. The possible products from the dry distillation include:
- Formaldehyde (HCHO)
- Acetone (CH₃COCH₃)
- Ethanol (C₂H₅OH)
- Propenal (C₃H₄O)

7. **Determining the Incorrect Compound**:
- Among the listed compounds, propenal (C₃H₄O) is not formed during the dry distillation of calcium formate and calcium acetate. Therefore, the answer to the question is propenal.

### Final Answer:
The compound which is not formed during the dry distillation of a mixture of calcium formate and calcium acetate is **Propenal (C₃H₄O)**.