Question

Which of the following has maximum laevorotatory nature ?

• A. $D$-Glucose
• B. $D$-Fructose
• C. Sucrose
• D. Invert sugar

Answer 1

Answer: (B)

$D$-Fructose

Answer 2

D - ( + ) - glucose has specific rotation of + 52.5$^{\circ}$
D-(-)-fructose has specific rotation of - 92.4$^{\circ}$
while that of invert sugar has laevorotation of - 92-4$^{\circ}$ + 52 5$^{\circ}$ = -39.9$^{\circ}$.