JEE Main 20265 AprilMorning Shift
- Exam
- JEE Main
- Year
- 2026
- Date
- 5 April
- Shift
- Morning Shift
- Subject
- Chemistry
- Chapter
- Biomolecules
JEE Main 2026 · 5 April · Morning Shift · Chemistry · Biomolecules
Identify the correct statements. A. Glucose exists in two anomeric...
Identify the correct statements.
A. Glucose exists in two anomeric forms.
B. Anomers of glucose differ in configuration at C in cyclic hemiacetal structure.
C. Melting point of -anomer of glucose is greater than -anomer.
D. Specific rotation of -anomer is while for -anomer is
E. and -anomers of glucose are prepared by crystallization of saturated glucose solution at K and K respectively.
Choose the correct answer from the options given below:
A. Glucose exists in two anomeric forms.
B. Anomers of glucose differ in configuration at C in cyclic hemiacetal structure.
C. Melting point of -anomer of glucose is greater than -anomer.
D. Specific rotation of -anomer is while for -anomer is
E. and -anomers of glucose are prepared by crystallization of saturated glucose solution at K and K respectively.
Choose the correct answer from the options given below:
Options
- AA and B Only
- BB and C Only
- CA, B and D Only
- DA, B and E Only
Correct answer
D. A, B and E Only
Step-by-step solution
Statement A is correct because glucose exists in two anomeric forms, -D-glucose and -D-glucose.
Statement B is correct because the two anomers differ only in the configuration of the hydroxyl group at C, which is the anomeric carbon in the cyclic hemiacetal structure.
Statement C is incorrect because the melting point of the -anomer is K, which is less than the melting point of the -anomer ( K).
Statement D is incorrect because the specific rotation of the -anomer is and that of the -anomer is .
Statement E is correct because the -form is obtained by crystallization from a concentrated solution of glucose at K, while the -form is obtained by crystallization from a hot and saturated aqueous solution at K.
Thus, statements A, B, and E are correct.
Answer: A, B and E Only
Statement B is correct because the two anomers differ only in the configuration of the hydroxyl group at C, which is the anomeric carbon in the cyclic hemiacetal structure.
Statement C is incorrect because the melting point of the -anomer is K, which is less than the melting point of the -anomer ( K).
Statement D is incorrect because the specific rotation of the -anomer is and that of the -anomer is .
Statement E is correct because the -form is obtained by crystallization from a concentrated solution of glucose at K, while the -form is obtained by crystallization from a hot and saturated aqueous solution at K.
Thus, statements A, B, and E are correct.
Answer: A, B and E Only