Which of the following statements is correct?

Options

A. Bacteria do not survive in salted pickles because they get plasmolysed in hypertonic medium.
B. Osmotic potential is numerically equal ot the osmotic pressure but is negative in sigh.
C. Kneading of wheat flour is accompanied by release of heat which is due to imbibition
D. all of these.

Answer

To determine which of the statements is correct, we will analyze each statement one by one.

### Step-by-Step Solution:

**Step 1: Analyze Statement 1**
- **Statement:** "Bacteria do not survive in salted pickles because they get plasmalized in hypertonic medium."
- **Explanation:** In a hypertonic medium, the concentration of solutes outside the bacterial cell is higher than inside. This causes water to move out of the cell, leading to plasmolysis (the shrinking of the cell membrane away from the cell wall). As a result, bacteria cannot survive in such conditions.
- **Conclusion:** This statement is correct.

**Step 2: Analyze Statement 2**
- **Statement:** "Osmotic potential is numerically equal to osmotic pressure but is negative in sign."
- **Explanation:** Osmotic potential (also known as osmotic pressure) is indeed a measure of the tendency of water to move into a solution. It is typically expressed as a negative value because it represents the potential energy of water in a solution compared to pure water. Thus, osmotic potential is negative when solutes are present.
- **Conclusion:** This statement is correct.

**Step 3: Analyze Statement 3**
- **Statement:** "Kneading of wheat flour is accompanied by release of heat which is due to imbibation."
- **Explanation:** Imbibation is the process by which substances absorb water and swell. When kneading wheat flour, water is absorbed, causing the flour to swell and release heat due to the energy changes during the process.
- **Conclusion:** This statement is correct.

**Step 4: Conclusion**
- Since all three statements (1, 2, and 3) are correct, the correct answer to the question is **D: All of these.**

### Final Answer: D (All of these)

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