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Which one of the following is known as cetane?

June 1, 2025 by rawan239

Which one of the following is known as cetane?

Hexadecane

Heptadecane

Octadecane

Nonadecane

This question was previously asked in

UPSC CDS-1 – 2024

Download PDF Attempt Online

Cetane is a term used in the context of diesel fuel quality.

Cetane is the common name for the alkane molecule hexadecane (C₁₆H₃₄). It is used as a reference standard with a high cetane number (defined as 100) to evaluate the ignition quality of diesel fuel.

The cetane number is a measure of a diesel fuel’s autoignition delay time. Fuels with higher cetane numbers ignite more readily under compression, leading to smoother engine operation.

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