The order of bond strength among C-F, C-Cl, C-Br, C-1 is

Options

A. `C-F gt C-CL gt C-Br gt C-I`
B. `C-F lt C-Cl lt C-Br lt C-I`
C. `C-F gt C-Cl lt C-Br lt C-I`
D. `C-F gt C-I lt C-Br ltC-I`

Explanation

To determine the order of bond strength among C-F, C-Cl, C-Br, and C-I bonds, we can analyze the electronegativity of the atoms involved and how it affects bond strength. Here’s a step-by-step solution:

### Step 1: Understand Electronegativity
Electronegativity is a measure of an atom's ability to attract and hold onto electrons. The greater the difference in electronegativity between two bonded atoms, the stronger the bond tends to be due to increased ionic character.

### Step 2: Identify Electronegativity Values
We need to know the electronegativity values of carbon and the halogens:
- Carbon (C): 2.55
- Fluorine (F): 3.98
- Chlorine (Cl): 3.16
- Bromine (Br): 2.96
- Iodine (I): 2.66

### Step 3: Calculate the Electronegativity Differences
Now, we will calculate the difference in electronegativity for each bond:
1. **C-F**: 3.98 - 2.55 = 1.43
2. **C-Cl**: 3.16 - 2.55 = 0.61
3. **C-Br**: 2.96 - 2.55 = 0.41
4. **C-I**: 2.66 - 2.55 = 0.11

### Step 4: Analyze the Differences
The order of electronegativity differences is:
- C-F: 1.43
- C-Cl: 0.61
- C-Br: 0.41
- C-I: 0.11

### Step 5: Determine the Order of Bond Strength
Since a greater electronegativity difference corresponds to a stronger bond, we can conclude the order of bond strength is:
**C-F > C-Cl > C-Br > C-I**

### Final Answer
The order of bond strength among C-F, C-Cl, C-Br, and C-I is:
**C-F > C-Cl > C-Br > C-I**