93) The heat of hydrogenation of benzene is 50 kcal⁄mol. The resonance energy of benzene is 36 kcal⁄mol. The heat of hydrogenation of cyclohexene is approximately:

94) Elimination of bromine from 2−bromobutane results in the formation of:

95) Electrolysis of cold concentrated aqueous solution of potassium succinate yields:

96) 1,2−dibromopropane on treatment with X moles of NaNH₂ followed by treatment with ethyl bromide gave pentyne. The value of X is:

97) When acetylene reacts with arsenic trichloride in the presence of anhydrous aluminium chloride, it produces: