14. BIOMOLECULES (HM)
Explanation:
Each of these two forms can be synthesized and isolated as pure compounds.
\((1)\).The alpha \((\alpha)\) anomer of \(D\)-glucose has a specific rotation of \(+112\) degrees in water.
\((2)\).The beta ( \(\beta\) ) anomer of \(D\)-glucose has a specific rotation of \(+19\) degrees. \((18.7\) actually, but rounding up to \(19)\).
And when either anomer is dissolved in water, the value of the specific rotation changes over time eventually reaching the same value of \(+52^{\circ}\).
The specific rotation of \(\alpha\)-D-glucopyranose decreases from \(+112^{\circ}\) to
\(+52^{\circ}\).
The specific rotation of \(\beta\)-D-glucopyranose increases from \(+19^{\circ}\) to
\(+52^{\circ}\).This behaviour is called mutarotation