1, 1- Dichloropropane on hydrolysis gives :

Options

A. propanone
B. propanal
C. ethanal
D. 1, 1- Propanediol

Answer

To solve the question regarding the hydrolysis of 1,1-Dichloropropane, we will follow these steps:

### Step 1: Identify the Structure of 1,1-Dichloropropane
1,1-Dichloropropane has the following structure:
- The molecular formula is C3H6Cl2.
- The structure can be represented as CH3-CHCl-CH2Cl.

### Step 2: Understand Hydrolysis
Hydrolysis is a reaction involving water (H2O) that leads to the breakdown of a compound. In this case, we are hydrolyzing 1,1-Dichloropropane, which will involve the substitution of chlorine atoms with hydroxyl groups (OH).

### Step 3: First Hydrolysis Step
When 1,1-Dichloropropane undergoes hydrolysis:
- The hydroxide ion (OH-) from water attacks one of the carbon atoms bonded to chlorine.
- This leads to the removal of one Cl atom and the formation of an intermediate product:
- CH3-CH(OH)-CH2Cl + HCl (Hydrochloric acid is released).

### Step 4: Second Hydrolysis Step
The intermediate product (CH3-CH(OH)-CH2Cl) can undergo further hydrolysis:
- Another hydroxide ion (OH-) attacks the carbon atom bonded to the remaining Cl atom.
- This results in the removal of the second Cl atom and the formation of another intermediate:
- CH3-CH(OH)-CH2(OH) + HCl.

### Step 5: Elimination of Water
The presence of two hydroxyl groups (OH) on adjacent carbon atoms can lead to instability due to repulsion between lone pairs. Therefore, one molecule of water is eliminated:
- CH3-CH(OH)-CH2(OH) → CH3-CH2-CHO + H2O.

### Step 6: Final Product
The final product after the elimination of water is:
- Propanal (CH3-CH2-CHO).

### Conclusion
Thus, the hydrolysis of 1,1-Dichloropropane yields propanal as the final product.

### Final Answer
The correct answer is propanal.

---