$C_{6}H_{12}O_{6}$ is the formula of:

Question

Accepted Answer

The correct option is (3):
Carbohydrates. The chemical formula $C\_{6}H\_{12}O\_{6}$ represents a hexose monosaccharide, which is the foundational and simplest unit of all carbohydrates. Specifically, this formula is shared by key simple sugars such as glucose, fructose, and galactose, which are the body's immediate sources of energy. A characteristic feature of the basic carbohydrate structure is the ratio of hydrogen to oxygen atoms being 2:1, which is identical to water ($H\_{2}O$) and is evident in the $H\_{12}O\_{6}$ portion of the formula. These single-sugar units serve as the building blocks that link together to form more complex carbohydrates like disaccharides (e.g., sucrose) and polysaccharides (e.g., starch and glycogen).

The incorrect option is (1):
Protein. Proteins are macromolecules constructed from long, folded chains of amino acids, which are much more complex than a simple six-carbon sugar. Their chemical formulas are immense and highly diverse, representing hundreds or thousands of atoms within the molecule. Unlike the simple $C\_{6}H\_{12}O\_{6}$ formula, proteins always contain nitrogen (N), which is an essential element in the amino acid structure. They often also contain sulfur (S), in addition to carbon, hydrogen, and oxygen. Therefore, a protein's chemical composition is far too vast and chemically distinct to be represented by the simple formula provided.

The incorrect option is (2):
Fat. Fats, which belong to the lipid group, are typically found as triglycerides, molecules formed from a glycerol backbone and three long fatty acid chains. The chemical structure of fats is characterized by a significantly higher proportion of carbon and hydrogen atoms relative to oxygen. Their primary purpose is long-term energy storage, which is achieved through these carbon-heavy, energy-rich chains. Consequently, the molecular formulas for fats are much larger than $C\_{6}H\_{12}O\_{6}$ and lack the defining 2:1 hydrogen-to-oxygen ratio seen in carbohydrates.

The incorrect option is (4):
Vitamin C. Vitamin C, which is chemically known as Ascorbic Acid, is a water-soluble vitamin and has a specific chemical formula of $C\_{6}H\_{8}O\_{6}$. While it shares the same number of carbon and oxygen atoms as the formula for glucose, the crucial difference lies in the hydrogen count: $H\_{8}$ instead of $H\_{12}$. This difference of four hydrogen atoms means Vitamin C is chemically classified as an entirely different compound. Therefore, the formula $C\_{6}H\_{12}O\_{6}$ correctly identifies a sugar, which is a carbohydrate, and not Vitamin C.