The drying agent which absorbs carbon dioxide and reacts violently with water is

Options

A. Sodium carbonate
B. Alcohol
C. Conc `H_(2)SO_(4)`
D. Calcium oxide

Explanation

To solve the question about the drying agent that absorbs carbon dioxide and reacts violently with water, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Properties of Drying Agents**:
- Drying agents, or dehydrating agents, are substances that absorb moisture from the environment. Common examples include concentrated sulfuric acid and calcium oxide.

2. **Identify the Function of Each Agent**:
- Concentrated sulfuric acid is a strong dehydrating agent but is also a strong oxidizing agent. It does not absorb carbon dioxide.
- Calcium oxide (CaO), on the other hand, can absorb carbon dioxide (CO₂) and react with it to form calcium carbonate (CaCO₃).

3. **Analyze the Reaction with Water**:
- When calcium oxide comes into contact with water, it reacts violently to form calcium hydroxide (Ca(OH)₂), which is an exothermic reaction. This indicates that it can react vigorously with water.

4. **Conclusion**:
- Based on the properties analyzed, the drying agent that absorbs carbon dioxide and reacts violently with water is **Calcium Oxide (CaO)**.

### Final Answer:
The drying agent which absorbs carbon dioxide and reacts violently with water is **Calcium Oxide (CaO)**.

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