Question

Which of the following statements are false?

• A. Glucose is the only aldose that mutarotates
• B. Ketose also mutarotates
• C. Glycosides mutarotates
• D. There is a relationship between the ability of a sugar to mutarotate and to reduce Tollens or Fehling's reagents

Answer 1

Answer: (A), (C)

The correct options are
A Glucose is the only aldose that mutarotates
C Glycosides mutarotates

(a) False, sugars containing hemiacetal show mutarotation.
(b) True, ketoses exist in hemiketals and posses anomers,
(c) False; the anomeric $OH$ is etherified and the equilibrium with the free carbonyl is destroyed.
(d) True, the statement is self explanatory

Hence, options A and C are correct.