Question

Wat is the name and the general formula of a chain of hydrocarbons in which an addition reaction with hydrogen can take place.

Answer 1

Alkenes (CnH2n) and Alkynes(CnH2n-2)...Hope it helps.....

Answer 2

Addition reaction with hydrogen can take place in 
   
      ALKENES  [CnH2n].   &
      ALKYNES  [CnH2n-2].

Hope it helps...