Alkanes with how many carbons are solids at rooms temperature

Options

A. above `C_(17)`
B. above `C_(10)`
C. above `C_(8)`
D. above `C_(4)`

Answer

To determine how many carbon atoms are present in alkanes that are solid at room temperature, we can follow these steps:

### Step 1: Understand the state of alkanes based on carbon count
Alkanes are categorized based on the number of carbon atoms they contain, and their physical state (solid, liquid, or gas) varies with this count.

### Step 2: Identify the states of alkanes
- **C1 to C4 (1 to 4 carbon atoms)**: These alkanes are gaseous at room temperature.
- **C5 to C17 (5 to 17 carbon atoms)**: These alkanes are liquid at room temperature.
- **C18 and above (18 or more carbon atoms)**: These alkanes are solid at room temperature.

### Step 3: Conclusion
From the information above, we can conclude that alkanes with **18 or more carbon atoms** are solid at room temperature.

### Final Answer
Alkanes with **18 or more carbon atoms** are solid at room temperature.

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