which of the following has smallest heat of hydrogenation per mole
A) 1-Butene B)trans-2-butene
C)cis-2-butene D)1,3-butadiene
Ans) D)1,3-butadiene because more stable the alkene,lesser the heat of hydrogenation per mole of double bond, 1,3-Butadiene has the most stable double bond due to conjugation.