Causticizing process is used for the preparation of

Options

A. (a) Caustic soda
B. (b) Caustic potash
C. (c) Slaked lime
D. (d) Sodium carbonate

Answer

To solve the question regarding the causticizing process and what it is used for, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Causticizing Process**:
The causticizing process involves a chemical reaction where sodium carbonate (Na2CO3) reacts with calcium hydroxide (Ca(OH)2), commonly referred to as milk of lime.

2. **Write the Reaction**:
The reaction can be represented as:
\[ \text{Na}_2\text{CO}_3 + \text{Ca(OH)}_2 \rightarrow \text{CaCO}_3 \downarrow + 2 \text{NaOH} \]
In this reaction, sodium carbonate reacts with calcium hydroxide to produce calcium carbonate (CaCO3) as a precipitate and sodium hydroxide (NaOH).

3. **Identify the Products**:
From the reaction, we can see that the main products formed are calcium carbonate, which precipitates out, and sodium hydroxide (NaOH), which is also known as caustic soda.

4. **Determine the Purpose of the Process**:
The primary purpose of the causticizing process is to convert sodium carbonate into sodium hydroxide (caustic soda). This is significant in various industrial applications, especially in the production of soaps, detergents, and other chemicals.

5. **Select the Correct Answer**:
Given the options:
- A) Caustic soda
- B) Caustic potash
- C) Slaked lime
- D) Sodium carbonate

The correct answer is **A) Caustic soda**, as it is the product formed from the causticizing process.

### Final Answer:
The causticizing process is used for the preparation of **caustic soda (NaOH)**.

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