Fresh grapes shall shrink when they are placed in

Options

A. Hot water
B. Cold water
C. Starch water
D. Concentrated salt solution

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks what happens to fresh grapes when they are placed in a specific solution. We need to determine the effect of different solutions on the grapes.

2. **Identifying the Solutions**: The options provided are:
- a. Water
- b. Cold water
- c. Starch water
- d. Concentrated salt solution

3. **Analyzing the Effects of Each Solution**:
- **Water**: When grapes are placed in pure water, they will absorb water due to osmosis, causing them to swell rather than shrink.
- **Cold Water**: Similar to pure water, cold water will also lead to the absorption of water, resulting in swelling.
- **Starch Water**: Starch water is not a hypertonic solution; it may not have a significant effect on the grapes.
- **Concentrated Salt Solution**: This is a hypertonic solution. When grapes are placed in it, the concentration of solute (salt) outside the grapes is higher than that inside the grapes.

4. **Understanding Osmosis**: Osmosis is the movement of water across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration. In this case, water will move out of the grapes into the concentrated salt solution.

5. **Conclusion**: Since water moves out of the grapes, they will lose water and shrink. Therefore, the correct answer is option **D: Concentrated salt solution**.

### Final Answer:
Fresh grapes shall shrink when they are placed in **D. Concentrated salt solution**.

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