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 hcain.
`overset("CHO ")overset("| ")underset("Glucose")underset(CH_(2)OH)underset("| ")(" "(CHOH)_(4)) overset(" HI/P ")underset(Delta)rarr underset("n - hexane")(CH_(3)-CH_(2)-CH_(2)-CH_(2)-CH_(2)-CH_(3))`