JEE Main 2022 · 26 Jul · Shift 1 · Chemistry Q79

ChemistrySingle correct+4 / -1Question 79 of 90

Which one of the following is a reducing sugar ?

Cyclic hemiacetal (pyranose) with a free anomeric OH

Methyl furanoside (anomeric OCH3)

Two furanose units joined anomeric to anomeric through O

Open-chain sugar with C1 as an acetal (OCH3, OCH3)

Answer and worked solution

Official answer: A

Free hemiacetal OH at the anomeric carbon (A) makes a reducing sugar; the glycosides and acetals do not reduce.

(A)

Topics:Carbohydrates

JEE Main 2022 · 26 Jul · Shift 1, Chemistry question 79