Which of the following is incorrectly matched?

Options

A. `SCI_(4)` - unstable liquid
B. `SeCI_(4)` - Sublimative solid
C. `TeC1_(4)` - hygroscopic solid
D. `SCI_(2)` - yellow oily liquid

Answer

To determine which of the given options is incorrectly matched, we will analyze each of the compounds mentioned in the question.

### Step 1: Analyze SCl4
- **Structure**: SCl4 (sulfur tetrachloride) has a seesaw molecular geometry due to the presence of one lone pair on the sulfur atom.
- **Physical State**: SCl4 is a pale yellow solid at room temperature, not a liquid.
- **Conclusion**: This option is incorrectly matched as it is stated to be a liquid.

### Step 2: Analyze SCl2
- **Structure**: SCl2 (sulfur dichloride) has a bent or angular structure.
- **Physical State**: SCl2 is a yellow oily liquid.
- **Conclusion**: This option is correctly matched.

### Step 3: Analyze TeCl4
- **Structure**: TeCl4 (tellurium tetrachloride) also has a seesaw molecular geometry.
- **Physical State**: TeCl4 is a highly hygroscopic solid.
- **Conclusion**: This option is correctly matched.

### Step 4: Analyze SCl4 (again for clarity)
- **Structure**: SCl4 has a similar structure to TeCl4.
- **Physical State**: As previously mentioned, SCl4 is a solid, not a liquid.
- **Conclusion**: This option is incorrectly matched.

### Final Conclusion
The incorrectly matched compound is **SCl4**, which is stated to be a liquid but is actually a pale yellow solid.

### Summary of Answers
- **Incorrectly Matched**: SCl4 (should be a solid, not a liquid).