A compound has the molecular formula C6H12O6. Which class of organic compounds does it belong to?

C6H12O6 is the formula of simple sugar, glucose. The primary elements in the glucose are carbon, hydrogen and oxygen. Thus, glucose belongs to the group of carbohydrate.

Carbohydrates are group of bio molecules that comprises of carbon, hydrogen and oxygen as its constituents elements. Thus all the substances that contain all three element primarily C, H and O are considered as carbohydrates.