Question

The molecular formula for glucose is $C_6{H}_{12}{O}_6$. What would be the formula for a polymer made by linking ten glucose molecules together by dehydration reactions?

• A. $C_{20}{H}_{120}{O}_{60}$
• B. $C_{60}{H}_{100}{O}_{50}$
• C. $C_{60}{H}_{102}{O}_{51}$
• D. $C_{60}{H}_{111}{O}_{51}$

Answer 1

The correct option is C $C_{60}{H}_{102}{O}_{51}$

by multiplying the molecular no of single glucose molecule with 10 we get 60 carbon and 120 hydrogen and 60 oxygen molecule. while formation of polysaccharide through dehydration reaction 9 water molecules are formed consist of 18 hydrogen and 9 oxygen molecules. as they are eliminated as water the polysaccharide consist only (120-18=102) hydrogen and (60-9=51) oxygen and carbon no remains constant.

So, the correct option is 'C'