The salt used in soda acid type extinguisher is

Options

A. potassium carbonate
B. sodium nitrate
C. sodium bicarbonate
D. potassium nitrate.

Explanation

**Step-by-Step Text Solution:**

1. **Identify the Type of Extinguisher**: The question asks about the salt used in a soda-acid type extinguisher. This type of extinguisher typically uses a reaction between a bicarbonate (soda) and an acid.

2. **Identify the Reactants**: In a soda-acid type extinguisher, sodium bicarbonate (NaHCO3) is the bicarbonate used. The acid commonly used is sulfuric acid (H2SO4).

3. **Chemical Reaction**: When sodium bicarbonate reacts with sulfuric acid, the following reaction occurs:
\[ \text{NaHCO}_3 + \text{H}_2\text{SO}_4 \rightarrow \text{Na}_2\text{SO}_4 + 2\text{H}_2\text{O} + 2\text{CO}_2 \]
This reaction produces sodium sulfate, water, and carbon dioxide.

4. **Identify the Salt**: The salt produced in this reaction is sodium sulfate (Na2SO4). However, the question specifically asks about the salt used in the extinguisher, which is sodium bicarbonate (NaHCO3).

5. **Choose the Correct Option**: Among the options provided:
- Potassium carbonate (wrong)
- Sodium nitrate (wrong)
- Sodium bicarbonate (correct)
- Potassium nitrate (wrong)

The correct answer is sodium bicarbonate.

**Final Answer**: The salt used in a soda-acid type extinguisher is sodium bicarbonate (NaHCO3).

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