Q108 / 200 · MHT CET - Medical 2026 (24 April Shift 1) · Chemistry
What is the general molecular formula for alkenes?
- A$\text{C}_n\text{H}_{2n+2}$
- Correct answerB$\text{C}_n\text{H}_{2n}$
- C$\text{C}_n\text{H}_{2n-2}$
- D$\text{C}_n\text{H}_n$
Solution
Alkenes are unsaturated hydrocarbons that contain at least one carbon-carbon double bond.
For an aliphatic, non-cyclic alkene with one double bond, the general molecular formula is $\text{C}_n\text{H}_{2n}$, where $n$ is the number of carbon atoms.
$\text{C}_n\text{H}_{2n+2}$ is the general formula for alkanes.
$\text{C}_n\text{H}_{2n-2}$ is the general formula for alkynes.
Answer: $\text{C}_n\text{H}_{2n}$
For an aliphatic, non-cyclic alkene with one double bond, the general molecular formula is $\text{C}_n\text{H}_{2n}$, where $n$ is the number of carbon atoms.
$\text{C}_n\text{H}_{2n+2}$ is the general formula for alkanes.
$\text{C}_n\text{H}_{2n-2}$ is the general formula for alkynes.
Answer: $\text{C}_n\text{H}_{2n}$
Hence, the correct answer is option: 'B'.