Identify the incorrect statement from the given below.

Options

A. Lithopone is cheap and possess good covering power
B. Lithopone is yellow pigment
C. Lithopone is prepared by mixing barium sulphide and zinc sulphate
D. Lithopone is used in medicine as radiocontrast agent.

Answer

To solve the question of identifying the incorrect statement about Lithopone, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Option 1: Lithopone is cheap and possesses good covering power.**
- Lithopone is known for its good covering power, which makes it an effective white pigment. Additionally, it is relatively inexpensive compared to other pigments.
- **Conclusion:** This statement is **true**.

2. **Option 2: Lithopone is a yellow pigment.**
- Lithopone is actually a white pigment, not yellow. It is commonly used in the paint industry for its excellent covering properties.
- **Conclusion:** This statement is **false**.

3. **Option 3: Lithopone is prepared by mixing barium sulphide and zinc sulphate.**
- Lithopone is formed from the reaction of barium sulphide and zinc sulphate, but the statement incorrectly states that it is prepared by mixing these two directly. The correct process involves a reaction rather than a simple mixing.
- **Conclusion:** This statement is **false**.

4. **Option 4: Lithopone is used in medicine as a radio contrast agent.**
- Lithopone has applications in medicine, including its use as a radiocontrast agent. This is a true statement.
- **Conclusion:** This statement is **true**.

### Final Answer:
The incorrect statements are **Option 2** (Lithopone is a yellow pigment) and **Option 3** (Lithopone is prepared by mixing barium sulphide and zinc sulphate).