Which of the following hydrocarbons is not likely to be present in petrol? A.C14H30 B.C10H22 C.C9H20 D.C7H16 E.C5H12

To determine which hydrocarbon is not likely to be present in petrol, we should consider the typical composition of petrol. Petrol, also known as gasoline, primarily consists of alkanes, cycloalkanes, and aromatic hydrocarbons with a carbon chain length usually between C5 and C12.

Analysis of Each Option:

1. C14H30 (Tetradecane): This hydrocarbon has a chain length that is longer than typical petrol components. While it can be present in some diesel fuels, it is less likely to be in petrol.
2. C10H22 (Decane): This is a common hydrocarbon found in petrol.
3. C9H20 (Nonane): This hydrocarbon is also common in petrol.
4. C7H16 (Heptane): A typical component of petrol, known for its good combustion properties.
5. C5H12 (Pentane): This hydrocarbon can also be found in petrol.

Conclusion:

From the analysis, it is clear that A. C14H30 (Tetradecane) is the hydrocarbon not likely to be present in petrol due to its longer carbon chain length.

Final Answer

A. C14H30 is the hydrocarbon that is not likely to be present in petrol.