Which of the following is not volatile substance ?

Options

A. Camphor
B. Petrol
C. Acetone
D. Acetanilide

Answer

To determine which of the following substances is not a volatile substance, we first need to understand what a volatile substance is.

### Step-by-Step Solution:

1. **Definition of Volatile Substance**:
A volatile substance is one that easily vaporizes at normal temperatures and pressures. This means that it can transition from a liquid or solid state to a gas state quickly.

2. **Examples of Volatile Substances**:
Common examples include:
- **Petrol**: It evaporates quickly and is used as fuel.
- **Acetone**: A solvent that also evaporates rapidly.
- **Ethanol**: Another common volatile liquid.

3. **Identifying Non-Volatile Substances**:
Non-volatile substances do not vaporize easily. They tend to have high boiling points and do not readily convert to gas at room temperature.

4. **Analyzing the Options**:
Without the specific options listed in the question, we would typically compare the known properties of each substance provided in the options. We would look for a substance that is known for its stability and low vapor pressure.

5. **Conclusion**:
After evaluating the options, the substance that does not easily vaporize or is stable at room temperature would be identified as the non-volatile substance.

### Final Answer:
The substance that is not volatile is the one that has a high boiling point and does not easily transition to a gas.

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