How do you show that glucose contains a linear chain of six carbon atoms.

Explanation

Glucose on prolonged heating with HI in presence of Red phosphorous, it gives n-hexane.
This shows that all the six carbon atoms are linked in a straight chain.
`underset("Glucose")({:(CHO),(|),((CHOH)_(4)),(|),(CH_(2)OH):}) underset(Delta)overset(HI//P)toCH_(3)-underset("n-hexane")(CH_(2)-CH_(2)-CH_(2))-CH_(2)-CH_(3)`