Diatomaceous earth is used in

Options

A. Polishing
B. Filtration of liquids
C. Purification of uranium
D. 1 and 2

Answer

**Step-by-Step Solution:**

1. **Understanding Diatomaceous Earth:**
- Diatomaceous earth is a naturally occurring, soft, siliceous sedimentary rock that is easily crumbled into a fine white to off-white powder. It is made from the fossilized remains of tiny, aquatic organisms called diatoms.

2. **Identifying Uses:**
- Diatomaceous earth has several industrial uses due to its unique properties. It is known for its high porosity and ability to absorb liquids.

3. **Filtration of Liquids:**
- One of the primary uses of diatomaceous earth is in the filtration of liquids. It is used to filter water and other liquids, effectively removing unwanted materials and impurities. This makes it suitable for applications in drinking water purification.

4. **Polishing:**
- Diatomaceous earth is also used for polishing purposes. Its fine texture allows it to be used as a mild abrasive in various products, including cleaning agents, cosmetics, and other polishing compounds.

5. **Conclusion:**
- Based on the uses identified, diatomaceous earth is used for both polishing and filtration of liquids. Therefore, the correct answer to the question is option D, which states that both option 1 (polishing) and option 2 (filtration of liquids) are correct.

**Final Answer:**
- The correct answer is D: 1 and 2 (polishing and filtration of liquids).

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