Which one of the following carbon compounds will not give a sooty flame ?

Options

A. Benzene
B. Hexane
C. Naphthalene
D. Anthracene

Explanation

To determine which carbon compound will not give a sooty flame, we need to understand the concepts of saturated and unsaturated hydrocarbons, as well as the characteristics of the flames they produce.

### Step-by-Step Solution:

1. **Understanding Sooty Flames:**
- A sooty flame is produced during the incomplete combustion of hydrocarbons, particularly unsaturated hydrocarbons. These flames are typically yellow in color due to the presence of carbon particles (soot).

2. **Identifying Unsaturated Hydrocarbons:**
- Unsaturated hydrocarbons contain double or triple bonds. Examples include alkenes (which have at least one double bond) and alkynes (which have at least one triple bond). Aromatic compounds, like benzene, also fall into this category and will produce a sooty flame.

3. **Understanding Non-Sooty Flames:**
- Non-sooty flames are produced by saturated hydrocarbons, which have only single bonds between carbon atoms. These flames are blue in color and indicate complete combustion, meaning that all the carbon is converted to carbon dioxide.

4. **Analyzing the Given Options:**
- Let's consider the options provided:
- **Option 1: Benzene (C6H6)** - This is an unsaturated hydrocarbon and will produce a sooty flame.
- **Option 2: Hexane (C6H14)** - This is a saturated hydrocarbon and will not produce a sooty flame.
- **Option 3: Naphthalene (C10H8)** - This is also an unsaturated hydrocarbon and will produce a sooty flame.
- **Option 4: Ethylene (C2H4)** - This is another unsaturated hydrocarbon and will produce a sooty flame.

5. **Conclusion:**
- Among the options, Hexane (C6H14) is the only compound that is saturated and will not give a sooty flame. Therefore, the answer is **Option 2: Hexane**.