Question

What will be the molecular formula of a disccharide rutinose formed from rhamnose $\left(C_6{H}_{12}{O}_5\right)$ and glucose $\left(C_6{H}_{12}{O}_6\right)$?

• A. $\left(C_{12}{H}_{24}{O}_{11}\right)$
• B. $\left(C_{12}{H}_{24}{O}_{12}\right)$
• C. $\left(C_{12}{H}_{22}{O}_{10}\right)$
• D. $\left(C_{11}{H}_{22}{O}_{10}\right)$

Answer 1

The correct option is C $\left(C_{12}{H}_{22}{O}_{10}\right)$

One molecule of water $\left(H_{2}O\right)$ is removed during formation of disaccharide from 2 monosaccharides. So molecular formula will be addition of molecular formulas of 2 monosaccharides minus $H_{2}O$ which is $\left(C_{12}{H}_{22}{O}_{10}\right)$.