Which of the following is highly inflammable ?

Options

A. alkane
B. alkene
C. alkyne
D. Can not be predicted

Explanation

To determine which of the following compounds is highly inflammable among alkane, alkene, and alkyne, we can analyze their structures and reactivity.

### Step-by-Step Solution:

1. **Understanding Hydrocarbons**:
- Hydrocarbons are organic compounds consisting entirely of hydrogen and carbon. They can be classified into three main categories: alkanes, alkenes, and alkynes.
- **Alkanes** are saturated hydrocarbons with single bonds (C-C).
- **Alkenes** are unsaturated hydrocarbons with at least one double bond (C=C).
- **Alkynes** are also unsaturated hydrocarbons but contain at least one triple bond (C≡C).

2. **Reactivity of Hydrocarbons**:
- Saturated hydrocarbons (alkanes) are generally more stable and less reactive than unsaturated hydrocarbons (alkenes and alkynes).
- Unsaturated hydrocarbons (alkenes and alkynes) have multiple bonds, which makes them more reactive due to the presence of double or triple bonds.

3. **Inflammability**:
- The term "inflammable" refers to the ability of a substance to catch fire easily.
- Alkanes, being saturated, can ignite and burn readily because they do not require breaking of multiple bonds to react with oxygen.
- Alkenes and alkynes, while still flammable, are less likely to ignite as easily as alkanes because they require the breaking of double or triple bonds before combustion can occur.

4. **Conclusion**:
- Based on the reactivity and structure of these hydrocarbons, alkanes are the most highly inflammable among the three types of hydrocarbons.
- Therefore, the correct answer is **option A: Alkane**.