The general formula of cycloalkene is __________________?
Correct answer: D. CnH2n-2
- A. CnH2n
- B. CnH2n+2
- C. CnH2n-1
- D. CnH2n-2
Explanation
A cycloalkene has one ring and one double bond, giving two degrees of unsaturation. Starting from the alkane formula CnH2n, the ring removes two hydrogen atoms and the double bond removes two more, so the formula is CnH2n-2. The likely mistake is CnH2n, which is the formula for a cycloalkane with only one ring.
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About Alkenes
Alkenes are unsaturated hydrocarbons containing a carbon-carbon double bond with sigma and pi components and restricted rotation. Their reactions include electrophilic addition of hydrogen, halogens, hydrogen halides and water, with Markovnikov orientation, oxidation, combustion and polymerisation, while their preparation commonly involves elimination from alkyl halides or alcohols.
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