Assertion: 1-Iodopropane and 2-Iodopropane are chain isomers
Reason: These differ in the position of Iodine in the carbon chains

Options

A. Assertion is false but reason is true
B. Assertion is true but reason is false
C. Both assertion and reason are true, but reason is not a true explanation for assertion
D. Both assertion and reason are true and reason is the correct explanation for assertion

Explanation

To solve the question, we need to analyze the assertion and the reason provided.

### Step 1: Understand the Assertion
The assertion states that 1-Iodopropane and 2-Iodopropane are chain isomers.

- **1-Iodopropane (C3H7I)** has the structure: CH3-CH2-CH2I
- **2-Iodopropane (C3H7I)** has the structure: CH3-CH(I)-CH3

### Step 2: Identify the Type of Isomerism
Next, we need to determine if they are chain isomers or position isomers.

- **Chain Isomers**: These occur when there is a difference in the arrangement of the carbon skeleton (i.e., different carbon chain structures).
- **Position Isomers**: These occur when the functional group (in this case, iodine) is attached to different carbon atoms in the same carbon skeleton.

### Step 3: Analyze the Structures
Both compounds have the same carbon skeleton (3 carbon atoms), but the position of the iodine differs:

- In 1-Iodopropane, iodine is attached to the terminal carbon (first carbon).
- In 2-Iodopropane, iodine is attached to the second carbon.

Since the only difference is the position of the iodine atom and not the arrangement of the carbon skeleton, these compounds are not chain isomers.

### Step 4: Evaluate the Reason
The reason states that these compounds differ in the position of iodine in the carbon chains. This statement is true because the iodine atom is indeed in different positions in the two compounds.

### Conclusion
- The assertion is **false** because 1-Iodopropane and 2-Iodopropane are not chain isomers; they are position isomers.
- The reason is **true** because they differ in the position of iodine.

Thus, the correct answer is that the assertion is false, but the reason is true.

### Final Answer
Assertion: False
Reason: True