Identify the incorrect statement among the following:

Options

A. water cools the combustible material
B. water vapours surround the combustible material
C. water lowers the temperature of the combustible material
D. water acts as an electrolyte

Answer

To solve the question of identifying the incorrect statement among the provided options, let's analyze each statement step by step.

### Step 1: Understand the Question
The question asks us to identify the incorrect statement regarding the properties and behavior of water in relation to combustible materials.

### Step 2: Analyze Each Statement
1. **Statement 1: Water cools the combustible material.**
- **Explanation:** Water does indeed cool combustible materials by lowering their temperature below the ignition temperature, which is the minimum temperature required for combustion to occur.
- **Conclusion:** This statement is **correct**.

2. **Statement 2: Water vapor surrounds the combustible material.**
- **Explanation:** Water vapor can surround combustible materials, and when it does, it can cut off the supply of oxygen necessary for combustion. This is a correct description of how water vapor can help extinguish fire.
- **Conclusion:** This statement is **correct**.

3. **Statement 3: Water lowers the temperature of the combustible material.**
- **Explanation:** This statement is similar to the first one. Water lowers the temperature of combustible materials, helping to prevent ignition by bringing the temperature below the ignition point.
- **Conclusion:** This statement is **correct**.

4. **Statement 4: Water acts as an electrolyte.**
- **Explanation:** This statement is incorrect. Pure water does not have enough ions to conduct electricity effectively, and therefore it does not act as an electrolyte. An electrolyte is a substance that produces ions in solution, allowing it to conduct electricity. Water alone does not meet this criterion.
- **Conclusion:** This statement is **incorrect**.

### Step 3: Identify the Incorrect Statement
Based on the analysis above, the incorrect statement is:
**4. Water acts as an electrolyte.**

### Final Answer
The incorrect statement among the options is: **Water acts as an electrolyte.**

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