Is sugar a carbohydrate? Why?

Mar 8, 2018

A sugar like glucose has the general formula $C \times {H}_{2} O$
A carbohydrate is a polyalcohol that usually either has an aldehyde or ketone functional group. Glucose is a polyalcohol with an aldehyde group (C6H12O6), but its formula is $6 \left(C \times {H}_{2} O\right)$, so we call them carbohydrates.