Wednesday, January 23, 2008

IIT JEE Revision Glucose and Sucrose

Glucose (C6H12O6) is a monosaccharide and it forms a six membered ring of five carbon atoms and one oxygen atom.

It is also known as dextrose, grape sugar and blood sugar.

Commercially pure glucose is manufactured by the hydrolysis of starch with dilute H2SO4 under a pressure of 4-5 atmospheres


Sucrose (common name: table sugar, also called saccharose) is a disaccharide (glucose + fructose) with the molecular formula C12H22O11.

Its systematic name is α-D-glucopyranosyl-(1↔2)-β-D-fructofuranose.

The glucose and fructose units are joined by an acetal oxygen bridge in the alpha orientation. The structure is easy to recognize because it contains the six member ring of glucose and the five member ring of fructose.

Pure sucrose is most often prepared as a fine, white, odorless crystalline powder with a pleasing, sweet taste; the common table sugar.

sucrose is a non-reducing sugar.

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