1 - Chloroprapane and 2 - chloropropane are

Options

A. Position isomers
B. Chain isomers
C. Functional isomers
D. Optical isomers

Explanation

To differentiate between 1-chloropropane and 2-chloropropane, we can follow these steps:

### Step 1: Understand the Structure of Propane
Propane is a three-carbon alkane with the formula C3H8. The structure of propane can be represented as:
```
H H H
| | |
H--C--C--C--H
| | |
H H H
```

### Step 2: Identify the Position of Chlorine in 1-Chloropropane
1-chloropropane has the chlorine atom attached to the first carbon of the propane chain. The structure can be drawn as:
```
Cl H H
| | |
H--C--C--C--H
| | |
H H H
```
This means that the chlorine atom is on the terminal carbon of the propane chain.

### Step 3: Identify the Position of Chlorine in 2-Chloropropane
2-chloropropane has the chlorine atom attached to the second carbon of the propane chain. The structure can be represented as:
```
H Cl H
| | |
H--C--C--C--H
| | |
H H H
```
In this case, the chlorine atom is attached to the middle carbon of the propane chain.

### Step 4: Analyze Chirality
Chirality refers to the property of a molecule having non-superimposable mirror images, which occurs when a carbon atom is bonded to four different groups.
- In 1-chloropropane, the first carbon is bonded to three hydrogens and one chlorine, which does not create chirality.
- In 2-chloropropane, the second carbon is also not chiral because it has two identical hydrogen atoms attached.

### Step 5: Conclusion
Both 1-chloropropane and 2-chloropropane are not chiral and do not exhibit optical isomerism. They are structural isomers of each other, differing in the position of the chlorine atom on the propane chain.