can be joined (to form saccharose) using dehydration synthesis. The new molecule, consisting of two monosaccharides, is called a disaccharide.

Dehydration reactions in organic chemistry resulting in unsaturated bonds

Nitrile formation

Nitriles are often prepared by dehydration of primary amides.
:RC(O)NH₂ -> RCN + H₂O

Ketene formation

Ketene is produced by heating