Which of the following alkanes is used for road surfacing?
- Alkanes with less then 10 Carbon atoms
- Alkanes having 20 C to 25 C atoms
- Alkanes having 25 C to 30 Catoms
- Alkanes having more than 35 C atoms
Solution
Alkane Properties and Uses by Carbon Chain Length
Gaseous alkanes (C1–C4) serve primarily as fuels, including methane in natural gas and propane/butane in liquefied petroleum gas (LPG).
Liquid alkanes (C5–C17) are key components of gasoline, kerosene, and diesel fuels.
Waxy solid alkanes (C18–C35) appear in paraffin wax, lubricating oils, and greases.
Higher molecular weight alkanes (over C35) are viscous liquids or solids used chiefly in bitumen for road surfacing and roofing applications.
Thus, alkanes with more than 35 carbon atoms are employed for road surfacing.
The correct option is D.
Asked in: MHT CET 2025 (21 April Shift 2)