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  4. The common molecular formula for disaccharide is

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Q. The common molecular formula for disaccharide is

AIIMSAIIMS 1999Biomolecules

Solution:

Molecular formula for monosaccharide (e.g. glucose, fructose) is given by : $C_6H_{12}O_6$. Therefore, molecular formula for the disaccharides is $C_{12}H_{22}O_{11}$.
$2C_6H_{12}O_6 \to C_{12}H_{22}O_{11} + H_{2O}$