Incorrect order about bond angle is `:`

Options

A. `H_(2)O gt H_(2)S gt H_(2)Se gt H_(2)Te`
B. `C_(2)H_(2) gt C_(2)H_(4) gt CH_(4) gt NH_(3)`
C. `SF_(6) lt NH_(3) lt H_(2)O lt OF_(2)`
D. `ClO_(2) gt H_(2)O gt H_(2)S gt SF_(6)`

Explanation

To solve the question regarding the incorrect order of bond angles, we will analyze the provided sets of bond angles step by step.

### Step 1: Analyze the first set of bond angles
The first set is:
\[ \text{H}_2\text{O} > \text{H}_2\text{S} > \text{H}_2\text{Se} > \text{H}_2\text{Te} \]

- **Explanation**: In group 16, as we move down from oxygen to tellurium, the electronegativity decreases. This leads to a decrease in the bond angle due to less repulsion between bond pairs. Therefore, the order is correct.

### Step 2: Analyze the second set of bond angles
The second set is:
\[ \text{C}_2\text{H}_2 > \text{C}_2\text{H}_6 > \text{CH}_4 > \text{NH}_3 \]

- **Explanation**:
- \(\text{C}_2\text{H}_2\) (acetylene) has a bond angle of 180° (linear).
- \(\text{C}_2\text{H}_6\) (ethane) has bond angles of approximately 109.5° (tetrahedral).
- \(\text{CH}_4\) (methane) also has bond angles of 109.5°.
- \(\text{NH}_3\) (ammonia) has a bond angle of approximately 107° due to lone pair-bond pair repulsion.

Thus, the order is correct.

### Step 3: Analyze the third set of bond angles
The third set is:
\[ \text{SF}_6 > \text{NH}_3 > \text{H}_2\text{O} > \text{OF}_2 \]

- **Explanation**:
- \(\text{SF}_6\) has bond angles of 90° (octahedral).
- \(\text{NH}_3\) has a bond angle of approximately 107°.
- \(\text{H}_2\text{O}\) has a bond angle of approximately 104.5°.
- \(\text{OF}_2\) has a bond angle less than that of \(\text{H}_2\text{O}\) due to the higher electronegativity of fluorine, which pulls the bond pairs closer to it, leading to a smaller angle.

Therefore, this order is incorrect because \(\text{H}_2\text{O}\) should have a larger angle than \(\text{OF}_2\).

### Step 4: Analyze the fourth set of bond angles
The fourth set is:
\[ \text{ClO}_2 > \text{H}_2\text{O} > \text{H}_2\text{S} > \text{SF}_6 \]

- **Explanation**:
- \(\text{ClO}_2\) has a bond angle of approximately 118°.
- \(\text{H}_2\text{O}\) has a bond angle of approximately 104.5°.
- \(\text{H}_2\text{S}\) has a bond angle of approximately 92°.
- \(\text{SF}_6\) has bond angles of 90°.

This order is correct.

### Conclusion
The incorrect order about bond angles is:
\[ \text{SF}_6 > \text{NH}_3 > \text{H}_2\text{O} > \text{OF}_2 \]