Propionic acid is subjected to reduction with hydroiodic acid in the presence of a little P, the product formed is
Propane
We know,
Alkanes can be prepared from reduction of acid and carbonyl compounds in presence of Red P + Ni
(b)CH3−CH2−COOH+6HlRedP−−−→
Propanoicacid
CH3−CH2−CH3+2H2O+32
Propane