Hydrolysis of 1,1, 1-trichloro derivative (A) of alkane gives a molecule (B) on alkaline hydrolysis which produces red coloration with aqueous `FeCl_(3)`. The compound (A) is -

Options

A. `CH_(3)CH_(2)C Cl_(3)`
B. `CH_(3)C Cl_(3)`
C. `CHCl_(3)`
D. None

Answer

To solve the problem, we need to identify the compound (A) that is a 1,1,1-trichloro derivative of an alkane. The hydrolysis of this compound in an alkaline solution produces another compound (B) that gives a red coloration with aqueous FeCl3.

### Step-by-Step Solution:

1. **Understanding the Problem**:
- We are looking for a 1,1,1-trichloro derivative of an alkane (compound A).
- Upon hydrolysis in an alkaline solution, it produces a compound (B) that reacts with FeCl3 to give a red color.

2. **Identifying Compound B**:
- The red coloration with FeCl3 suggests that compound B is likely a carboxylic acid, specifically acetic acid (CH3COOH), because acetic acid forms a red complex with FeCl3.

3. **Finding Compound A**:
- To produce acetic acid from a 1,1,1-trichloro derivative, we need to consider the hydrolysis of various trichloro compounds.
- The general structure of a 1,1,1-trichloro derivative can be represented as R-CCl3, where R is a hydrocarbon chain.

4. **Testing Possible Compounds**:
- Let's evaluate the possible candidates for compound A:
1. **Trichloroethane (CCl3CH3)**: Hydrolysis would yield propanoic acid, not acetic acid.
2. **Trichloromethane (CHCl3)**: Hydrolysis would yield formic acid (not acetic acid).
3. **1,1,1-Trichloroethane (CCl3CH3)**: Hydrolysis gives acetic acid.
4. **1,1,1-Trichloropropane (CCl3CH2CH3)**: Hydrolysis gives propanoic acid.

5. **Conclusion**:
- The only compound that produces acetic acid upon hydrolysis is **1,1,1-trichloroethane (CCl3CH3)**.
- Therefore, compound A is **1,1,1-trichloroethane**.

### Final Answer:
The compound (A) is **1,1,1-trichloroethane (CCl3CH3)**.