Acetone `(CH_(3)COCH_(3))` and propanal `(CH_(3)CH_(2)CHO)` are

Options

A. functional isomers
B. position isomers
C. geometrical isomers
D. optical isomers

Explanation

To solve the question regarding the relationship between acetone `(CH₃COCH₃)` and propanal `(CH₃CH₂CHO)`, we can follow these steps:

### Step 1: Identify the Molecular Formula
First, we need to determine the molecular formula for both compounds.

- **Acetone**: The molecular formula is `(CH₃)₂CO`, which can be simplified to `C₃H₆O`.
- **Propanal**: The molecular formula is `C₃H₆O`.

### Step 2: Compare the Molecular Formulas
Next, we compare the molecular formulas of acetone and propanal.

- Both acetone and propanal have the same molecular formula: `C₃H₆O`.

### Step 3: Identify the Functional Groups
Now, we need to identify the functional groups present in each compound.

- **Acetone**: It is a ketone, characterized by the carbonyl group (C=O) located between two carbon atoms.
- **Propanal**: It is an aldehyde, characterized by the carbonyl group (C=O) located at the end of the carbon chain.

### Step 4: Determine the Type of Isomerism
Since both compounds have the same molecular formula but different functional groups, we can conclude the type of isomerism.

- The relationship between acetone and propanal is that they exhibit **functional isomerism**. This means they are isomers that differ in the functional group.

### Final Conclusion
Acetone `(CH₃COCH₃)` and propanal `(CH₃CH₂CHO)` are functional isomers of each other, as they have the same molecular formula `C₃H₆O` but different functional groups (ketone vs. aldehyde).

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