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 a keto sugar because it contains a ketone functional group (unlike glucose, which is an aldose).
- C. Fructose exists in \(\alpha\) and \(\beta\) anomeric forms when it cyclizes to form a furanose ring.
- D. Fructose is laevorotatory, meaning it rotates plane-polarized light to the left.

Therefore, X is D-Fructose.