Question

Which form of glucose is obtained by crystallization from hot and saturated aqueous solution at 371K?

(a) D-form

(b) L-form

(c) α-form

(d) β-form

I had been asked this question in an internship interview.

I want to ask this question from Biomolecules Carbohydrates topic in section Biomolecules of Chemistry – Class 12

Answer 1

The correct choice is (d) β-form

The explanation is: When a saturated aqueous solution is heated to about 100°C and then crystallized, the β-form of glucose is obtained. On the other hand, a concentrated solution at room temperature on crystallization gives α-form.