The ozonolysis product of an alkyne is 2-oxopentanal. Then the alkyne is___________

Explanation

2-oxopentanal is
`CH_(3)-CH_(2)-CH_(2)-underset(O)underset(||)(C)-underset(O)underset(||)(CH)`
Hence the triple bond should be present between `C_(1) and C_(2)`, so that the alkyne is 1-pentyne.
`CH_(3)-CH_(2)-CH_(2)-C-=CH`