Question:
Which of the following alkanes is used for road surfacing?
Which of the following alkanes is used for road surfacing?
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Alkanes with a carbon chain length of 20-30 atoms are ideal for applications requiring durability, such as road surfacing.
Updated On: Jun 30, 2026
- Alkanes with less than 10 C atoms
- Alkanes having 20 C to 25 C atoms
- Alkanes having 25 C to 30 C atoms
- Alkanes having more than 35 C atoms
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The Correct Option is C
Solution and Explanation
Step 1: Understand the usage of alkanes in road surfacing.
Alkanes are typically used for road surfacing in the form of bitumen, which is derived from petroleum. The ideal alkanes for this purpose are those with relatively high molecular weights, as they provide better durability and resistance to wear.
Step 2: Identify the relevant properties of alkanes.
Alkanes with a carbon chain length of 20 to 30 atoms are typically used for applications such as road surfacing, as they provide the necessary viscosity and hardness. These alkanes are long enough to provide strong, durable bonds but not too long to make the compound overly stiff.
Step 3: Evaluate the other options.
- Alkanes with less than 10 carbon atoms are typically gaseous or liquid at room temperature and are not suitable for road surfacing.
- Alkanes with 35 or more carbon atoms tend to be more viscous and are used in other industrial applications but are not ideal for surfacing because of their hardness.
Step 4: Final conclusion.
Therefore, the correct answer is:
\[ \boxed{(3)\ \text{Alkanes having 25 C to 30 C atoms}} \]
Alkanes are typically used for road surfacing in the form of bitumen, which is derived from petroleum. The ideal alkanes for this purpose are those with relatively high molecular weights, as they provide better durability and resistance to wear.
Step 2: Identify the relevant properties of alkanes.
Alkanes with a carbon chain length of 20 to 30 atoms are typically used for applications such as road surfacing, as they provide the necessary viscosity and hardness. These alkanes are long enough to provide strong, durable bonds but not too long to make the compound overly stiff.
Step 3: Evaluate the other options.
- Alkanes with less than 10 carbon atoms are typically gaseous or liquid at room temperature and are not suitable for road surfacing.
- Alkanes with 35 or more carbon atoms tend to be more viscous and are used in other industrial applications but are not ideal for surfacing because of their hardness.
Step 4: Final conclusion.
Therefore, the correct answer is:
\[ \boxed{(3)\ \text{Alkanes having 25 C to 30 C atoms}} \]
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