JEE Main 2026 · 5 Apr · Shift 1 · Chemistry Q69

ChemistrySingle correct+4 / -1Question 69 of 75

Identify the correct statements.

A. Glucose exists in two anomeric forms.

B. Anomers of glucose differ in configuration at C−1 in cyclic hemiacetal structure.

C. Melting point of α-anomer of glucose is greater than β-anomer.

D. Specific rotation of α-anomer is +19° while for β-anomer is +112°

E. α and β-anomers of glucose are prepared by crystallization of saturated glucose solution at 303 K and 371 K respectively.

Choose the correct answer from the options given below:

A and B Only

B and C Only

A, B and D Only

A, B and E Only

Answer and worked solution

Official answer: D

Each statement.

A: Glucose has two anomers, α and β. True.
B: The anomers differ only in configuration at C-1. True.
C: α-Glucose melts at 419 K and β at 423 K, so α is lower. False.
D: The rotations are swapped: α is $+112^\circ$ and β is $+19^\circ$ . False.
E: α-Glucose crystallises from a concentrated solution at 303 K, and β from a hot saturated solution at 371 K. True.

Correct: A, B and E.

(D)

Topics:Carbohydrates

JEE Main 2026 · 5 Apr · Shift 1, Chemistry question 69