(I) Stability order and (II) heat of hydrogenation orders.

The correct heat of hydrogenation order of

Alkenes on catalytic hydrogenation give alkanes. The reactions are exothermic. The heat of hydrogenation is a measure of stability of alkene. Lesser the heat of hydrogenation more stable the alkene. The correct order of heat of hydrogenation is

Write increasing order of heat of hydrogenation:

Write increasing order of heat of hydrogenation :

Write increasing order of heat of hydrogenation :

Write increasing order of heat of hydrogenation :

Write increasing order of heat of hydrogenation :

Write increasing order of heat of hydrogenation :

Write increasing order of heat of hydrogenation :

Compare heat of hydrogenation (Decreasing order)