Read the given passage and answer the following
questions.
Sanjana while preparing cake used baking soda in small amounts. It helps to make the cake soft land spongy. An aqueous solution of baking soda also turns red litmus blue. It is also used in soda acid extinguisher.
Name the gas produced by the reaction of baking soda and acid which helps as fire extinguisher.

Options

A. Carbon monoxide
B. Carbon dioxide
C. Hydrogen
D. Oxygen

Explanation

To solve the question, we need to identify the gas produced by the reaction of baking soda (sodium bicarbonate) with an acid, which is used as a fire extinguisher.

### Step-by-Step Solution:

1. **Identify the Reactants**: The question mentions baking soda, which is chemically known as sodium bicarbonate (NaHCO₃). It is important to note that baking soda reacts with acids.

2. **Write the Reaction**: When baking soda reacts with an acid (for example, sulfuric acid, H₂SO₄), the following reaction occurs:
\[ 2 \text{NaHCO}_3 + \text{H}_2\text{SO}_4 \rightarrow \text{Na}_2\text{SO}_4 + 2 \text{H}_2\text{O} + \text{CO}_2 \]
In this reaction, sodium sulfate (Na₂SO₄), water (H₂O), and carbon dioxide (CO₂) are produced.

3. **Identify the Gas**: From the reaction, we see that carbon dioxide (CO₂) is one of the products formed when baking soda reacts with an acid.

4. **Relate to Fire Extinguisher**: The question specifically asks for the gas that helps as a fire extinguisher. Carbon dioxide is commonly used in fire extinguishers because it displaces oxygen, thus suffocating the fire.

5. **Final Answer**: Therefore, the gas produced by the reaction of baking soda and acid, which is used in fire extinguishers, is **carbon dioxide (CO₂)**.