Octyne has the same number of hydrogen atoms as that of __________.
As shown above, octyne has 14 hydrogen atoms.
The above given options are of alkenes and the general formula is Cn H2n.
Since the number of hydrogen atoms in the alkene is 14, using the general formula we get ⇒2n=14 (where 'n' is the number of carbon atoms).
∴n=7
So, the alkene should have 7 carbon atoms and 14 hydrogen atoms.
Comparing the options, butene has 4 carbon atoms, pentene has 5 carbon atoms and hexene has 6 carbon atoms.
The alkene with 14 hydrogen atoms(same as octyne) is heptene.