Which of the following group of hydrocarbons follows the general formula of C_n H_2n?

Correct option is D

The correct answer is option (d) Alkenes .

• Alkenes are unsaturated hydrocarbons that contain at least one carbon-carbon double bond.
• The general formula for alkenes is CₙH₂ₙ, where "n" represents the number of carbon atoms.

Overview of Other Options:

• Alkyne: Alkyne hydrocarbons follow the general formula CₙH₂ₙ₋₂. They contain at least one carbon-carbon triple bond.
• Alkyl: Alkyl groups are derived from alkanes by removing one hydrogen atom. They do not have a specific general formula like alkenes or alkynes.
  
• Alkane: Alkanes follow the general formula CₙH₂ₙ₊₂. They are saturated hydrocarbons with only single bonds between carbon atoms.