Preparation of salt from sea water involves

Options

A. evaporation
B. filtration
C. sedimentation and decantation
D. sublimation

Explanation

**Step-by-Step Solution for the Preparation of Salt from Sea Water:**

1. **Understanding Sea Water Composition:**
- Sea water contains various dissolved salts, primarily sodium chloride (NaCl), along with other minerals.

2. **Creating Salt Solution:**
- When sea water is collected, it is essentially a solution where NaCl is dissolved in water.

3. **Evaporation Process:**
- To extract salt from sea water, the process of evaporation is used. This involves heating the sea water to convert the liquid water into water vapor.
- As the water evaporates, it leaves behind the dissolved salts.

4. **Formation of Salt Crystals:**
- Once the water has evaporated completely, the remaining substance is solid salt (NaCl) in crystal form.

5. **Filtration (if necessary):**
- If there are any insoluble impurities in the sea water, filtration can be used to separate these impurities from the salt solution before evaporation.

6. **Final Collection:**
- The salt crystals can then be collected and stored for use.

**Summary of the Process:**
- Collect sea water → Evaporate water → Collect salt crystals.

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