Which of the following diagrams shows correct change in the polarity of bond ?

Options

A.
B.
C.
D.

Answer

To determine which of the diagrams shows the correct change in the polarity of the bond, we need to analyze the electronegativity of the elements involved in each bond. The polarity of a bond is influenced by the difference in electronegativity between the two atoms forming the bond.

### Step-by-Step Solution:

1. **Understand Electronegativity**:
- Electronegativity is the ability of an atom to attract electrons in a bond. The greater the difference in electronegativity between two bonded atoms, the more polar the bond will be.

2. **List the Elements and Their Electronegativity**:
- The elements in question are:
- Oxygen (O)
- Chlorine (Cl)
- Sulfur (S)
- Fluorine (F)
- The general order of electronegativity for these elements is:
- Fluorine (F) > Oxygen (O) > Chlorine (Cl) > Sulfur (S)

3. **Identify the Bonds**:
- The bonds we need to evaluate are:
- O-H (Oxygen-Hydrogen)
- Cl-H (Chlorine-Hydrogen)
- S-H (Sulfur-Hydrogen)
- F-H (Fluorine-Hydrogen)

4. **Determine the Change in Electronegativity**:
- The change in electronegativity for each bond can be summarized as follows:
- F-H bond has the highest polarity due to the highest difference in electronegativity.
- O-H bond follows next.
- Cl-H bond comes after that.
- S-H bond has the lowest polarity.

5. **Arrange the Bonds by Polarity**:
- Based on the electronegativity differences, the order of polarity from highest to lowest is:
- F-H > O-H > Cl-H > S-H

6. **Evaluate the Options**:
- Now, we need to check the provided options against this order:
- **Option 1**: O-H decreases to Cl-H (correct), Cl-H increases to F-H (correct), H decreases to S-H (incorrect), S-H decreases to O-H (incorrect).
- **Option 2**: O-H decreases to Cl-H (correct), Cl-H decreases to F-H (incorrect).
- **Option 3**: O-H increases to Cl-H (incorrect), Cl-H decreases to S-H (correct).
- **Option 4**: O-H decreases to Cl-H (correct), Cl-H increases to F-H (correct), Cl-H decreases to S-H (correct), S-H increases to O-H (incorrect).

7. **Select the Correct Option**:
- After analyzing all options, the correct order of polarity is best represented by **Option 1** and **Option 4**; however, Option 4 is the most consistent with the overall trend in electronegativity.

### Conclusion:
The correct answer is **Option 4**, as it best represents the changes in bond polarity based on electronegativity differences.