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Question

The molecular formula for glucose is C6H12O6. What would be the formula for a polymer made by linking ten glucose molecules together by dehydration reactions?

A
C20H120O60
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B
C60H100O50
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C
C60H102O51
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D
C60H111O51
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Solution

The correct option is C C60H102O51
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'

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