Question
Alkenes and Alkynes.

Answer

  Alkenes   Alkynes
$(i)$ The hydrocarbons which contains carbon to carbon double bonds $(C=C)$ are called alkenes. $(i)$ The hydrocarbons which contain carbon to carbon triple bonds $(C=C)$ are called alkynes.
$(ii)$ Their general formula is $C_nH_{2n}$ $(ii)$ Their general formula is $C_nH_{2n-2}.$

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