Which one of the following is the most acidic?

a)cycloprop-2-ene b)cyclopent-2,4-diene c)cyclohept-2,4,6-triene

d)propene? plz explain also!

'x' gm of a compound A3B2C5 contains 'y' gm of A atoms

 

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Plz answer this query.....................................................................................................

how to represent the possible fischer projections for 2-bromohexane