Q72 / 240 · KCET 2026 · Chemistry
The compound with molecular formula $\text{C}_{20}\text{H}_{42}$ is
- ADecane
- BDodecane
- Correct answerCEicosane
- DHicosane
Solution
The given molecular formula is $\text{C}_{20}\text{H}_{42}$.
This matches the general formula for alkanes, $\text{C}_n\text{H}_{2n+2}$, where $n = 20$.
The IUPAC root word for a 20-carbon chain is 'eicos'.
Therefore, the alkane with 20 carbon atoms is named eicosane.
Answer: Eicosane
This matches the general formula for alkanes, $\text{C}_n\text{H}_{2n+2}$, where $n = 20$.
The IUPAC root word for a 20-carbon chain is 'eicos'.
Therefore, the alkane with 20 carbon atoms is named eicosane.
Answer: Eicosane
Hence, the correct answer is option: 'C'.