Question

Sugar ‘X’:
A. is found in honey.
B. is a keto sugar.
C. exists in $\alpha$ and $\beta$ anomeric forms.
D. is laevorotatory.
‘X’ is:

• A. D-Fructose
• B. Sucrose
• C. Maltose
• D. D-Glucose

Hint:

Fructose is the only sugar among common monosaccharides that is a keto sugar and exhibits laevorotation. It is found in honey and has \(\alpha\) and \(\beta\) anomeric forms.

Answer 1

The Correct Option is A

Let’s analyze each statement:
- A. Fructose is commonly found in honey, making it a suitable candidate.
- B. Fructose is classified as a keto sugar due to its ketone functional group, contrasting with glucose which is an aldose.
- C. Fructose exhibits \(\alpha\) and \(\beta\) anomeric forms upon cyclization into a furanose ring.
- D. Fructose is laevorotatory, indicated by its ability to rotate plane-polarized light counter-clockwise (to the left).
Therefore, X represents D-Fructose.