Question

amongst c6h4 and C2H6 which is more reactive and why

Answer 1

it is quite obvious to see the chemical property of alkanes and alkenes, 
alkanes exhibit addition reactions while alkenes exhibit substitution reactions i.e ethane won't be able to react as enhancely as ethene due to stable structure but in other hand ethene in presence of double bond has an option to act as a nucleophile or convert to a cationic charge i.e -(C+)-C-.. 
Hence higher the order of reaction of a compund,higher becomes the reactivity 

So, reactivity is in order of C2H4>C2H6

HOPE IT HELPS
PLEAEE MARK AS BRAINLIEST

Answer 2

Ethene (C6H4) is more reactive than Ethane (C2H6) as ethene has a double one of them is a Pi bond which is weak and easily broken during chemical reactions while ethane has a single bond which is a strong sigma bond.