Substance having low ignition temperature is

Options

A. combustible
B. inflammable
C. non-combustible
D. none of these

Answer

To determine the substance with a low ignition temperature, we need to analyze the options provided in the question. Let's break down the solution step by step:

### Step 1: Understand Ignition Temperature
- **Definition**: Ignition temperature is the minimum temperature at which a substance starts to burn in the presence of air.

### Step 2: Analyze the Options
1. **Combustible**:
- **Definition**: A combustible substance is one that can burn in air and produce heat and light.
- **Analysis**: Combustible substances can have varying ignition temperatures; they are not necessarily low. Therefore, this option is not correct.

2. **Inflammable**:
- **Definition**: Inflammable substances are those that catch fire easily and have a low ignition temperature.
- **Analysis**: This option fits the criteria of having a low ignition temperature. Examples include petrol and alcohol. Therefore, this option is correct.

3. **Non-combustible**:
- **Definition**: Non-combustible substances do not burn in the presence of air.
- **Analysis**: Since these substances do not burn, we cannot assign a low ignition temperature to them. Their ignition temperature is very high. Therefore, this option is incorrect.

### Step 3: Conclusion
- Based on the analysis, the substance with a low ignition temperature is **Inflammable**.

### Final Answer
- The correct answer is **Inflammable**.

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