Read the following statements and select the incorrect option w.r.t. kieselguhr (diatomaceous earth). [(a) It is a whitish non porous powder obtained on mining hard shells of diatomite., (b) It is rough and gritty., (c) It is used in filters in brewing industries and sugarcane refineries.,(d) It is used for making the sound proof houses., (e) It is added in paint to decrease night visibility.]

Options

A. (b),(c) & (d)
B. (a),(b),(c) & (d)
C. (a) & (e) only
D. (e) only.

Answer

To solve the question regarding the incorrect statements about kieselguhr (diatomaceous earth), we will analyze each statement one by one.

### Step-by-step Solution:

1. **Statement (a):** "It is a whitish non-porous powder obtained on mining hard shells of diatomite."
- **Analysis:** Kieselguhr is indeed a whitish powder, but it is not non-porous; it is highly porous. Therefore, this statement is incorrect.

2. **Statement (b):** "It is rough and gritty."
- **Analysis:** This statement is true. Kieselguhr has a rough and gritty texture.

3. **Statement (c):** "It is used in filters in brewing industries and sugarcane refineries."
- **Analysis:** This statement is also true. Kieselguhr is commonly used as a filtering agent in these industries.

4. **Statement (d):** "It is used for making soundproof houses."
- **Analysis:** This statement is true. Due to its properties, kieselguhr can be used in soundproofing applications.

5. **Statement (e):** "It is added in paint to decrease night visibility."
- **Analysis:** This statement is misleading. Kieselguhr is added to paint, but not to decrease night visibility; it is used as a filler or to improve texture. Therefore, this statement is incorrect.

### Conclusion:
The incorrect options regarding kieselguhr are **(a)** and **(e)**.

### Final Answer:
The incorrect statements are **(a)** and **(e)**.

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